{"id":83,"date":"2026-03-22T17:00:46","date_gmt":"2026-03-22T09:00:46","guid":{"rendered":"https:\/\/codergodv.xyz\/?p=83"},"modified":"2026-03-22T17:00:47","modified_gmt":"2026-03-22T09:00:47","slug":"c%e5%a4%9a%e6%80%81","status":"publish","type":"post","link":"https:\/\/codergodv.xyz\/index.php\/2026\/03\/22\/c%e5%a4%9a%e6%80%81\/","title":{"rendered":"C++\u591a\u6001"},"content":{"rendered":"\n

\u591a\u6001\u7684\u6982\u5ff5<\/h2>\n\n\n\n
\n

\u591a\u6001\u5c31\u662f\u51fd\u6570\u8c03\u7528\u7684\u591a\u79cd\u5f62\u6001\uff0c\u4f7f\u7528\u591a\u6001\u80fd\u591f\u4f7f\u5f97\u4e0d\u540c\u7684\u5bf9\u8c61\u53bb\u5b8c\u6210\u540c\u4e00\u4ef6\u4e8b\u65f6\uff0c\u4ea7\u751f\u4e0d\u540c\u7684\u52a8\u4f5c\u548c\u7ed3\u679c\u3002<\/p>\n<\/blockquote>\n\n\n\n

\u4f8b\u5982\uff0c\u5728\u73b0\u5b9e\u751f\u6d3b\u5f53\u4e2d\uff0c\u666e\u901a\u4eba\u4e70\u7968\u662f\u5168\u4ef7\uff0c\u5b66\u751f\u4e70\u7968\u662f\u534a\u4ef7\uff0c\u800c\u519b\u4eba\u5141\u8bb8\u4f18\u5148\u4e70\u7968\u3002\u4e0d\u540c\u8eab\u4efd\u7684\u4eba\u53bb\u4e70\u7968\uff0c\u6240\u4ea7\u751f\u7684\u884c\u4e3a\u662f\u4e0d\u540c\u7684\uff0c\u8fd9\u5c31\u662f\u6240\u8c13\u7684\u591a\u6001\u3002<\/p>\n\n\n\n

\u591a\u6001\u7684\u5b9a\u4e49\u53ca\u5b9e\u73b0<\/h2>\n\n\n\n

\u591a\u6001\u7684\u6784\u6210\u6761\u4ef6<\/h3>\n\n\n\n

\u591a\u6001\u662f\u6307\u4e0d\u540c\u7ee7\u627f\u5173\u7cfb\u7684\u7c7b\u5bf9\u8c61\uff0c\u53bb\u8c03\u7528\u540c\u4e00\u51fd\u6570\uff0c\u4ea7\u751f\u4e86\u4e0d\u540c\u7684\u884c\u4e3a\u3002\u5728\u7ee7\u627f\u4e2d\u8981\u60f3\u6784\u6210\u591a\u6001\u9700\u8981\u6ee1\u8db3\u4e24\u4e2a\u6761\u4ef6\uff1a<\/p>\n\n\n\n

    \n
  1. \u5fc5\u987b\u901a\u8fc7\u57fa\u7c7b\u7684\u6307\u9488\u6216\u8005\u5f15\u7528\u8c03\u7528\u865a\u51fd\u6570\u3002<\/li>\n\n\n\n
  2. \u88ab\u8c03\u7528\u7684\u51fd\u6570\u5fc5\u987b\u662f\u865a\u51fd\u6570\uff0c\u4e14\u6d3e\u751f\u7c7b\u5fc5\u987b\u5bf9\u57fa\u7c7b\u7684\u865a\u51fd\u6570\u8fdb\u884c\u91cd\u5199\u3002<\/li>\n<\/ol>\n\n\n\n

    \u865a\u51fd\u6570<\/h3>\n\n\n\n

    \u88abvirtual\u4fee\u9970\u7684\u7c7b\u6210\u5458\u51fd\u6570\u88ab\u79f0\u4e3a\u865a\u51fd\u6570\u3002<\/p>\n\n\n\n

    class Person\n{\npublic:\n    \/\/\u88abvirtual\u4fee\u9970\u7684\u7c7b\u6210\u5458\u51fd\u6570\n    virtual void BuyTicket()\n    {\n        cout << \"\u4e70\u7968-\u5168\u4ef7\" << endl;\n    }\n};<\/code><\/pre>\n\n\n\n
    \u9700\u8981\u6ce8\u610f\u7684\u662f\uff1a<\/strong><\/p>\n\n\n\n
      \n
    1. \u53ea\u6709\u7c7b\u7684\u975e\u9759\u6001\u6210\u5458\u51fd\u6570\u524d\u53ef\u4ee5\u52a0virtual\uff0c\u666e\u901a\u51fd\u6570\u524d\u4e0d\u80fd\u52a0virtual\u3002<\/li>\n\n\n\n
    2. \u865a\u51fd\u6570\u8fd9\u91cc\u7684virtual\u548c\u865a\u7ee7\u627f\u4e2d\u7684virtual\u662f\u540c\u4e00\u4e2a\u5173\u952e\u5b57\uff0c\u4f46\u662f\u5b83\u4eec\u4e4b\u95f4\u6ca1\u6709\u4efb\u4f55\u5173\u7cfb\u3002\u865a\u51fd\u6570\u8fd9\u91cc\u7684virtual\u662f\u4e3a\u4e86\u5b9e\u73b0\u591a\u6001\uff0c\u800c\u865a\u7ee7\u627f\u7684virtual\u662f\u4e3a\u4e86\u89e3\u51b3\u83f1\u5f62\u7ee7\u627f\u7684\u6570\u636e\u5197\u4f59\u548c\u4e8c\u4e49\u6027\u3002<\/li>\n<\/ol>\n\n\n\n
      \u865a\u51fd\u6570\u7684\u91cd\u5199<\/h3>\n\n\n\n
      \u865a\u51fd\u6570\u7684\u91cd\u5199\u4e5f\u53eb\u505a\u865a\u51fd\u6570\u7684\u8986\u76d6\uff0c\u82e5\u6d3e\u751f\u7c7b\u4e2d\u6709\u4e00\u4e2a\u548c\u57fa\u7c7b\u5b8c\u5168\u76f8\u540c\u7684\u865a\u51fd\u6570(\u8fd4\u56de\u503c\u7c7b\u578b\u76f8\u540c\u3001\u51fd\u6570\u540d\u76f8\u540c\u4ee5\u53ca\u53c2\u6570\u5217\u8868\u5b8c\u5168\u76f8\u540c)\uff0c\u6b64\u65f6\u6211\u4eec\u79f0\u8be5\u6d3e\u751f\u7c7b\u7684\u865a\u51fd\u6570\u91cd\u5199\u4e86\u57fa\u7c7b\u7684\u865a\u51fd\u6570\u3002<\/p>\n\n\n\n
      \u4f8b\u5982\uff0c\u6211\u4eec\u4ee5\u4e0bStudent\u548cSoldier\u4e24\u4e2a\u5b50\u7c7b\u91cd\u5199\u4e86\u7236\u7c7bPerson\u7684\u865a\u51fd\u6570\u3002<\/p>\n\n\n\n
      \/\/\u7236\u7c7b\nclass Person\n{\npublic:\n    \/\/\u7236\u7c7b\u7684\u865a\u51fd\u6570\n    virtual void BuyTicket()\n    {\n        cout << \"\u4e70\u7968-\u5168\u4ef7\" << endl;\n    }\n};\n\/\/\u5b50\u7c7b\nclass Student : public Person\n{\npublic:\n    \/\/\u5b50\u7c7b\u7684\u865a\u51fd\u6570\u91cd\u5199\u4e86\u7236\u7c7b\u7684\u865a\u51fd\u6570\n    virtual void BuyTicket()\n    {\n        cout << \"\u4e70\u7968-\u534a\u4ef7\" << endl;\n    }\n};\n\/\/\u5b50\u7c7b\nclass Soldier : public Person\n{\npublic:\n    \/\/\u5b50\u7c7b\u7684\u865a\u51fd\u6570\u91cd\u5199\u4e86\u7236\u7c7b\u7684\u865a\u51fd\u6570\n    virtual void BuyTicket()\n    {\n        cout << \"\u4f18\u5148-\u4e70\u7968\" << endl;\n    }\n};<\/code><\/pre>\n\n\n\n
      \u73b0\u5728\u6211\u4eec\u5c31\u53ef\u4ee5\u901a\u8fc7\u7236\u7c7bPerson\u7684\u6307\u9488\u6216\u8005\u5f15\u7528\u8c03\u7528\u865a\u51fd\u6570BuyTicket\uff0c\u6b64\u65f6\u4e0d\u540c\u7c7b\u578b\u7684\u5bf9\u8c61\uff0c\u8c03\u7528\u7684\u5c31\u662f\u4e0d\u540c\u7684\u51fd\u6570\uff0c\u4ea7\u751f\u7684\u4e5f\u662f\u4e0d\u540c\u7684\u7ed3\u679c\uff0c\u8fdb\u800c\u5b9e\u73b0\u4e86\u51fd\u6570\u8c03\u7528\u7684\u591a\u79cd\u5f62\u6001\u3002<\/p>\n\n\n\n
      void Func(Person& p)\n{\n    \/\/\u901a\u8fc7\u7236\u7c7b\u7684\u5f15\u7528\u8c03\u7528\u865a\u51fd\u6570\n    p.BuyTicket();\n}\nvoid Func(Person* p)\n{\n    \/\/\u901a\u8fc7\u7236\u7c7b\u7684\u6307\u9488\u8c03\u7528\u865a\u51fd\u6570\n    p->BuyTicket();\n}\nint main()\n{\n    Person p;   \/\/\u666e\u901a\u4eba\n    Student st; \/\/\u5b66\u751f\n    Soldier sd; \/\/\u519b\u4eba\n\n    Func(p);  \/\/\u4e70\u7968-\u5168\u4ef7\n    Func(st); \/\/\u4e70\u7968-\u534a\u4ef7\n    Func(sd); \/\/\u4f18\u5148\u4e70\u7968\n\n    Func(&p);  \/\/\u4e70\u7968-\u5168\u4ef7\n    Func(&st); \/\/\u4e70\u7968-\u534a\u4ef7\n    Func(&sd); \/\/\u4f18\u5148\u4e70\u7968\n    return 0;\n}<\/code><\/pre>\n\n\n\n
      \u6ce8\u610f\uff1a<\/strong> \u5728\u91cd\u5199\u57fa\u7c7b\u865a\u51fd\u6570\u65f6\uff0c\u6d3e\u751f\u7c7b\u7684\u865a\u51fd\u6570\u4e0d\u52a0virtual\u5173\u952e\u5b57\u4e5f\u53ef\u4ee5\u6784\u6210\u91cd\u5199\uff0c\u4e3b\u8981\u539f\u56e0\u662f\u56e0\u4e3a\u7ee7\u627f\u540e\u57fa\u7c7b\u7684\u865a\u51fd\u6570\u88ab\u7ee7\u627f\u4e0b\u6765\u4e86\uff0c\u5728\u6d3e\u751f\u7c7b\u4e2d\u4f9d\u65e7\u4fdd\u6301\u865a\u51fd\u6570\u5c5e\u6027\u3002\u4f46\u662f\u8fd9\u79cd\u5199\u6cd5\u4e0d\u662f\u5f88\u89c4\u8303\uff0c\u56e0\u6b64\u5efa\u8bae\u5728\u6d3e\u751f\u7c7b\u7684\u865a\u51fd\u6570\u524d\u4e5f\u52a0\u4e0avirtual\u5173\u952e\u5b57\u3002<\/p>\n\n\n\n
      \u865a\u51fd\u6570\u91cd\u5199\u7684\u4e24\u4e2a\u4f8b\u5916<\/h3>\n\n\n\n
      \n
      \u534f\u53d8\uff08\u57fa\u7c7b\u4e0e\u6d3e\u751f\u7c7b\u865a\u51fd\u6570\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u4e0d\u540c\uff09<\/p>\n<\/blockquote>\n\n\n\n
      \u6d3e\u751f\u7c7b\u91cd\u5199\u57fa\u7c7b\u865a\u51fd\u6570\u65f6\uff0c\u4e0e\u57fa\u7c7b\u865a\u51fd\u6570\u8fd4\u56de\u503c\u7c7b\u578b\u4e0d\u540c\u3002\u5373\u57fa\u7c7b\u865a\u51fd\u6570\u8fd4\u56de\u57fa\u7c7b\u5bf9\u8c61\u7684\u6307\u9488\u6216\u8005\u5f15\u7528\uff0c\u6d3e\u751f\u7c7b\u865a\u51fd\u6570\u8fd4\u56de\u6d3e\u751f\u7c7b\u5bf9\u8c61\u7684\u6307\u9488\u6216\u8005\u5f15\u7528\uff0c\u79f0\u4e3a\u534f\u53d8\u3002<\/p>\n\n\n\n
      \u4f8b\u5982\uff0c\u4e0b\u5217\u4ee3\u7801\u4e2d\u57fa\u7c7bPerson\u5f53\u4e2d\u7684\u865a\u51fd\u6570fun\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u662f\u57fa\u7c7bA\u5bf9\u8c61\u7684\u6307\u9488\uff0c\u6d3e\u751f\u7c7bStudent\u5f53\u4e2d\u7684\u865a\u51fd\u6570fun\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u662f\u6d3e\u751f\u7c7bB\u5bf9\u8c61\u7684\u6307\u9488\uff0c\u6b64\u65f6\u4e5f\u8ba4\u4e3a\u6d3e\u751f\u7c7bStudent\u7684\u865a\u51fd\u6570\u91cd\u5199\u4e86\u57fa\u7c7bPerson\u7684\u865a\u51fd\u6570\u3002<\/p>\n\n\n\n
      \/\/\u57fa\u7c7b\nclass A\n{};\n\/\/\u5b50\u7c7b\nclass B : public A\n{};\n\/\/\u57fa\u7c7b\nclass Person\n{\npublic:\n    \/\/\u8fd4\u56de\u57fa\u7c7bA\u7684\u6307\u9488\n    virtual A* fun()\n    {\n        cout << \"A* Person::f()\" << endl;\n        return new A;\n    }\n};\n\/\/\u5b50\u7c7b\nclass Student : public Person\n{\npublic:\n    \/\/\u8fd4\u56de\u5b50\u7c7bB\u7684\u6307\u9488\n    virtual B* fun()\n    {\n        cout << \"B* Student::f()\" << endl;\n        return new B;\n    }\n};<\/code><\/pre>\n\n\n\n
      \u6b64\u65f6\uff0c\u6211\u4eec\u901a\u8fc7\u7236\u7c7bPerson\u7684\u6307\u9488\u8c03\u7528\u865a\u51fd\u6570fun\uff0c\u7236\u7c7b\u6307\u9488\u82e5\u6307\u5411\u7684\u662f\u7236\u7c7b\u5bf9\u8c61\uff0c\u5219\u8c03\u7528\u7236\u7c7b\u7684\u865a\u51fd\u6570\uff0c\u7236\u7c7b\u6307\u9488\u82e5\u6307\u5411\u7684\u662f\u5b50\u7c7b\u5bf9\u8c61\uff0c\u5219\u8c03\u7528\u5b50\u7c7b\u7684\u865a\u51fd\u6570\u3002<\/p>\n\n\n\n
      int main()\n{\n    Person p;\n    Student st;\n    \/\/\u7236\u7c7b\u6307\u9488\u6307\u5411\u7236\u7c7b\u5bf9\u8c61\n    Person* ptr1 = &p;\n    \/\/\u7236\u7c7b\u6307\u9488\u6307\u5411\u5b50\u7c7b\u5bf9\u8c61\n    Person* ptr2 = &st;\n    \/\/\u7236\u7c7b\u6307\u9488ptr1\u6307\u5411\u7684p\u662f\u7236\u7c7b\u5bf9\u8c61\uff0c\u8c03\u7528\u7236\u7c7b\u7684\u865a\u51fd\u6570\n    ptr1->fun(); \/\/A* Person::f()\n    \/\/\u7236\u7c7b\u6307\u9488ptr2\u6307\u5411\u7684st\u662f\u5b50\u7c7b\u5bf9\u8c61\uff0c\u8c03\u7528\u5b50\u7c7b\u7684\u865a\u51fd\u6570\n    ptr2->fun(); \/\/B* Student::f()\n    return 0;\n}<\/code><\/pre>\n\n\n\n
      \n
      \u6790\u6784\u51fd\u6570\u7684\u91cd\u5199\uff08\u57fa\u7c7b\u4e0e\u6d3e\u751f\u7c7b\u6790\u6784\u51fd\u6570\u7684\u540d\u5b57\u4e0d\u540c\uff09<\/p>\n<\/blockquote>\n\n\n\n
      \u5982\u679c\u57fa\u7c7b\u7684\u6790\u6784\u51fd\u6570\u4e3a\u865a\u51fd\u6570\uff0c\u6b64\u65f6\u6d3e\u751f\u7c7b\u6790\u6784\u51fd\u6570\u53ea\u8981\u5b9a\u4e49\uff0c\u65e0\u8bba\u662f\u5426\u52a0virtual\u5173\u952e\u5b57\uff0c\u90fd\u4e0e\u57fa\u7c7b\u7684\u6790\u6784\u51fd\u6570\u6784\u6210\u91cd\u5199\uff0c\u867d\u7136\u57fa\u7c7b\u4e0e\u6d3e\u751f\u7c7b\u6790\u6784\u51fd\u6570\u540d\u5b57\u4e0d\u540c\u3002<\/p>\n\n\n\n
      \u4f8b\u5982\uff0c\u4e0b\u9762\u4ee3\u7801\u4e2d\u7236\u7c7bPerson\u548c\u5b50\u7c7bStudent\u7684\u6790\u6784\u51fd\u6570\u6784\u6210\u91cd\u5199\u3002<\/p>\n\n\n\n
      \/\/\u7236\u7c7b\nclass Person\n{\npublic:\n    virtual ~Person()\n    {\n        cout << \"~Person()\" << endl;\n    }\n};\n\/\/\u5b50\u7c7b\nclass Student : public Person\n{\npublic:\n    virtual ~Student()\n    {\n        cout << \"~Student()\" << endl;\n    }\n};<\/code><\/pre>\n\n\n\n
      \u90a3\u7236\u7c7b\u548c\u5b50\u7c7b\u7684\u6790\u6784\u51fd\u6570\u6784\u6210\u91cd\u5199\u7684\u610f\u4e49\u4f55\u5728\u5462\uff1f\u8bd5\u60f3\u4ee5\u4e0b\u573a\u666f\uff1a\u5206\u522bnew\u4e00\u4e2a\u7236\u7c7b\u5bf9\u8c61\u548c\u5b50\u7c7b\u5bf9\u8c61\uff0c\u5e76\u5747\u7528\u7236\u7c7b\u6307\u9488\u6307\u5411\u5b83\u4eec\uff0c\u7136\u540e\u5206\u522b\u7528delete\u8c03\u7528\u6790\u6784\u51fd\u6570\u5e76\u91ca\u653e\u5bf9\u8c61\u7a7a\u95f4\u3002<\/p>\n\n\n\n
      int main()\n{\n    \/\/\u5206\u522bnew\u4e00\u4e2a\u7236\u7c7b\u5bf9\u8c61\u548c\u5b50\u7c7b\u5bf9\u8c61\uff0c\u5e76\u5747\u7528\u7236\u7c7b\u6307\u9488\u6307\u5411\u5b83\u4eec\n    Person* p1 = new Person;\n    Person* p2 = new Student;\n\n    \/\/\u4f7f\u7528delete\u8c03\u7528\u6790\u6784\u51fd\u6570\u5e76\u91ca\u653e\u5bf9\u8c61\u7a7a\u95f4\n    delete p1;\n    delete p2;\n    return 0;\n}<\/code><\/pre>\n\n\n\n
      \u5728\u8fd9\u79cd\u573a\u666f\u4e0b\uff0c\u82e5\u662f\u7236\u7c7b\u548c\u5b50\u7c7b\u7684\u6790\u6784\u51fd\u6570\u6ca1\u6709\u6784\u6210\u91cd\u5199\u5c31\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\uff0c\u56e0\u4e3a\u6b64\u65f6delete p1\u548cdelete p2\u90fd\u662f\u8c03\u7528\u7684\u7236\u7c7b\u7684\u6790\u6784\u51fd\u6570\uff0c\u800c\u6211\u4eec\u6240\u671f\u671b\u7684\u662fp1\u8c03\u7528\u7236\u7c7b\u7684\u6790\u6784\u51fd\u6570\uff0cp2\u8c03\u7528\u5b50\u7c7b\u7684\u6790\u6784\u51fd\u6570\uff0c\u5373\u6211\u4eec\u671f\u671b\u7684\u662f\u4e00\u79cd\u591a\u6001\u884c\u4e3a\u3002
      \u6b64\u65f6\u53ea\u6709\u7236\u7c7b\u548c\u5b50\u7c7b\u7684\u6790\u6784\u51fd\u6570\u6784\u6210\u4e86\u91cd\u5199\uff0c\u624d\u80fd\u4f7f\u5f97delete\u6309\u7167\u6211\u4eec\u7684\u9884\u671f\u8fdb\u884c\u6790\u6784\u51fd\u6570\u7684\u8c03\u7528\uff0c\u624d\u80fd\u5b9e\u73b0\u591a\u6001\u3002\u56e0\u6b64\uff0c\u4e3a\u4e86\u907f\u514d\u51fa\u73b0\u8fd9\u79cd\u60c5\u51b5\uff0c\u6bd4\u8f83\u5efa\u8bae\u5c06\u7236\u7c7b\u7684\u6790\u6784\u51fd\u6570\u5b9a\u4e49\u4e3a\u865a\u51fd\u6570\u3002<\/p>\n\n\n\n
      \u77e5\u8bc6\u6269\u5c55\uff1a<\/strong><\/p>\n\n\n\n
      \u5728\u7ee7\u627f\u5f53\u4e2d\uff0c\u5b50\u7c7b\u548c\u7684\u6790\u6784\u51fd\u6570\u548c\u7236\u7c7b\u7684\u6790\u6784\u51fd\u6570\u6784\u6210\u9690\u85cf\u7684\u539f\u56e0\u5c31\u5728\u8fd9\u91cc\uff0c\u8fd9\u91cc\u8868\u9762\u4e0a\u770b\u5b50\u7c7b\u7684\u6790\u6784\u51fd\u6570\u548c\u7236\u7c7b\u7684\u6790\u6784\u51fd\u6570\u7684\u51fd\u6570\u540d\u4e0d\u540c\uff0c\u4f46\u662f\u4e3a\u4e86\u6784\u6210\u91cd\u5199\uff0c\u7f16\u8bd1\u540e\u6790\u6784\u51fd\u6570\u7684\u540d\u5b57\u4f1a\u88ab\u7edf\u4e00\u5904\u7406\u6210destructor();<\/code>\u3002<\/p>\n\n\n\n
      C++11 override\u548cfinal<\/h3>\n\n\n\n
      \u4ece\u4e0a\u9762\u53ef\u4ee5\u770b\u51fa\uff0cC++\u5bf9\u51fd\u6570\u91cd\u5199\u7684\u8981\u6c42\u6bd4\u8f83\u4e25\u683c\uff0c\u6709\u4e9b\u60c5\u51b5\u4e0b\u7531\u4e8e\u758f\u5ffd\u53ef\u80fd\u4f1a\u5bfc\u81f4\u51fd\u6570\u540d\u7684\u5b57\u6bcd\u6b21\u5e8f\u5199\u53cd\u800c\u65e0\u6cd5\u6784\u6210\u91cd\u5199\uff0c\u800c\u8fd9\u79cd\u9519\u8bef\u5728\u7f16\u8bd1\u671f\u95f4\u662f\u4e0d\u4f1a\u62a5\u9519\u7684\uff0c\u76f4\u5230\u5728\u7a0b\u5e8f\u8fd0\u884c\u65f6\u6ca1\u6709\u5f97\u5230\u9884\u671f\u7ed3\u679c\u518d\u6765\u8fdb\u884c\u8c03\u8bd5\u4f1a\u5f97\u4e0d\u507f\u5931\uff0c\u56e0\u6b64\uff0cC++11\u63d0\u4f9b\u4e86final\u548coverride\u4e24\u4e2a\u5173\u952e\u5b57\uff0c\u53ef\u4ee5\u5e2e\u52a9\u7528\u6237\u68c0\u6d4b\u662f\u5426\u91cd\u5199\u3002<\/p>\n\n\n\n
      \n
      final\uff1a\u4fee\u9970\u865a\u51fd\u6570\uff0c\u8868\u793a\u8be5\u865a\u51fd\u6570\u4e0d\u80fd\u518d\u88ab\u91cd\u5199<\/p>\n<\/blockquote>\n\n\n\n
      \u4f8b\u5982\uff0c\u7236\u7c7bPerson\u7684\u865a\u51fd\u6570BuyTicket\u88abfinal\u4fee\u9970\u540e\u5c31\u4e0d\u80fd\u518d\u88ab\u91cd\u5199\u4e86\uff0c\u5b50\u7c7b\u82e5\u662f\u91cd\u5199\u4e86\u7236\u7c7b\u7684BuyTicket\u51fd\u6570\u5219\u7f16\u8bd1\u62a5\u9519\u3002<\/p>\n\n\n\n
      \/\/\u7236\u7c7b\nclass Person\n{\npublic:\n    \/\/\u88abfinal\u4fee\u9970\uff0c\u8be5\u865a\u51fd\u6570\u4e0d\u80fd\u518d\u88ab\u91cd\u5199\n    virtual void BuyTicket() final\n    {\n        cout << \"\u4e70\u7968-\u5168\u4ef7\" << endl;\n    }\n};\n\/\/\u5b50\u7c7b\nclass Student : public Person\n{\npublic:\n    \/\/\u91cd\u5199\uff0c\u7f16\u8bd1\u62a5\u9519\n    virtual void BuyTicket()\n    {\n        cout << \"\u4e70\u7968-\u534a\u4ef7\" << endl;\n    }\n};\n\/\/\u5b50\u7c7b\nclass Soldier : public Person\n{\npublic:\n    \/\/\u91cd\u5199\uff0c\u7f16\u8bd1\u62a5\u9519\n    virtual void BuyTicket()\n    {\n        cout << \"\u4f18\u5148-\u4e70\u7968\" << endl;\n    }\n};<\/code><\/pre>\n\n\n\n
      \n
      override\uff1a\u68c0\u67e5\u6d3e\u751f\u7c7b\u865a\u51fd\u6570\u662f\u5426\u91cd\u5199\u4e86\u57fa\u7c7b\u7684\u67d0\u4e2a\u865a\u51fd\u6570\uff0c\u5982\u679c\u6ca1\u6709\u91cd\u5199\u5219\u7f16\u8bd1\u62a5\u9519\u3002<\/p>\n<\/blockquote>\n\n\n\n
      \u4f8b\u5982\uff0c\u5b50\u7c7bStudent\u548cSoldier\u7684\u865a\u51fd\u6570BuyTicket\u88aboverride\u4fee\u9970\uff0c\u7f16\u8bd1\u65f6\u5c31\u4f1a\u68c0\u67e5\u5b50\u7c7b\u7684\u8fd9\u4e24\u4e2aBuyTicket\u51fd\u6570\u662f\u5426\u91cd\u5199\u4e86\u7236\u7c7b\u7684\u865a\u51fd\u6570\uff0c\u5982\u679c\u6ca1\u6709\u5219\u4f1a\u7f16\u8bd1\u62a5\u9519\u3002<\/p>\n\n\n\n
      \/\/\u7236\u7c7b\nclass Person\n{\npublic:\n    virtual void BuyTicket()\n    {\n        cout << \"\u4e70\u7968-\u5168\u4ef7\" << endl;\n    }\n};\n\/\/\u5b50\u7c7b\nclass Student : public Person\n{\npublic:\n    \/\/\u5b50\u7c7b\u5b8c\u6210\u4e86\u7236\u7c7b\u865a\u51fd\u6570\u7684\u91cd\u5199\uff0c\u7f16\u8bd1\u901a\u8fc7\n    virtual void BuyTicket() override\n    {\n        cout << \"\u4e70\u7968-\u534a\u4ef7\" << endl;\n    }\n};\n\/\/\u5b50\u7c7b\nclass Soldier : public Person\n{\npublic:\n    \/\/\u5b50\u7c7b\u6ca1\u6709\u5b8c\u6210\u4e86\u7236\u7c7b\u865a\u51fd\u6570\u7684\u91cd\u5199\uff0c\u7f16\u8bd1\u62a5\u9519\n    virtual void BuyTicket(int i) override\n    {\n        cout << \"\u4f18\u5148-\u4e70\u7968\" << endl;\n    }\n};<\/code><\/pre>\n\n\n\n
      \u91cd\u8f7d\u3001\u8986\u76d6\uff08\u91cd\u5199\uff09\u3001\u9690\u85cf\uff08\u91cd\u5b9a\u4e49\uff09\u7684\u5bf9\u6bd4<\/h3>\n\n\n\n
      \"\"\/<\/div><\/figure>\n\n\n\n
      \u62bd\u8c61\u7c7b<\/h2>\n\n\n\n
      \u6982\u5ff5<\/h3>\n\n\n\n
      \u5728\u865a\u51fd\u6570\u7684\u540e\u9762\u5199\u4e0a=0\uff0c\u5219\u8fd9\u4e2a\u51fd\u6570\u4e3a\u7eaf\u865a\u51fd\u6570\u3002\u5305\u542b\u7eaf\u865a\u51fd\u6570\u7684\u7c7b\u53eb\u505a\u62bd\u8c61\u7c7b\uff08\u4e5f\u53eb\u63a5\u53e3\u7c7b\uff09\uff0c\u62bd\u8c61\u7c7b\u4e0d\u80fd\u5b9e\u4f8b\u5316\u51fa\u5bf9\u8c61\u3002<\/p>\n\n\n\n
      #include <iostream>\nusing namespace std;\n\/\/\u62bd\u8c61\u7c7b\uff08\u63a5\u53e3\u7c7b\uff09\nclass Car\n{\npublic:\n    \/\/\u7eaf\u865a\u51fd\u6570\n    virtual void Drive() = 0;\n};\nint main()\n{\n    Car c; \/\/\u62bd\u8c61\u7c7b\u4e0d\u80fd\u5b9e\u4f8b\u5316\u51fa\u5bf9\u8c61\uff0cerror\n    return 0;\n}<\/code><\/pre>\n\n\n\n
      \u6d3e\u751f\u7c7b\u7ee7\u627f\u62bd\u8c61\u7c7b\u540e\u4e5f\u4e0d\u80fd\u5b9e\u4f8b\u5316\u51fa\u5bf9\u8c61\uff0c\u53ea\u6709\u91cd\u5199\u7eaf\u865a\u51fd\u6570\uff0c\u6d3e\u751f\u7c7b\u624d\u80fd\u5b9e\u4f8b\u5316\u51fa\u5bf9\u8c61\u3002<\/p>\n\n\n\n
      #include <iostream>\nusing namespace std;\n\/\/\u62bd\u8c61\u7c7b\uff08\u63a5\u53e3\u7c7b\uff09\nclass Car\n{\npublic:\n    \/\/\u7eaf\u865a\u51fd\u6570\n    virtual void Drive() = 0;\n};\n\/\/\u6d3e\u751f\u7c7b\nclass Benz : public Car\n{\npublic:\n    \/\/\u91cd\u5199\u7eaf\u865a\u51fd\u6570\n    virtual void Drive()\n    {\n        cout << \"Benz-\u8212\u9002\" << endl;\n    }\n};\n\/\/\u6d3e\u751f\u7c7b\nclass BMV : public Car\n{\npublic:\n    \/\/\u91cd\u5199\u7eaf\u865a\u51fd\u6570\n    virtual void Drive()\n    {\n        cout << \"BMV-\u64cd\u63a7\" << endl;\n    }\n};\nint main()\n{\n    \/\/\u6d3e\u751f\u7c7b\u91cd\u5199\u4e86\u7eaf\u865a\u51fd\u6570\uff0c\u53ef\u4ee5\u5b9e\u4f8b\u5316\u51fa\u5bf9\u8c61\n    Benz b1;\n    BMV b2;\n    \/\/\u4e0d\u540c\u5bf9\u8c61\u7528\u57fa\u7c7b\u6307\u9488\u8c03\u7528Drive\u51fd\u6570\uff0c\u5b8c\u6210\u4e0d\u540c\u7684\u884c\u4e3a\n    Car* p1 = &b1;\n    Car* p2 = &b2;\n    p1->Drive();  \/\/Benz-\u8212\u9002\n    p2->Drive();  \/\/BMV-\u64cd\u63a7\n    return 0;\n}<\/code><\/pre>\n\n\n\n
      \n
      \u62bd\u8c61\u7c7b\u65e2\u7136\u4e0d\u80fd\u5b9e\u4f8b\u5316\u51fa\u5bf9\u8c61\uff0c\u90a3\u62bd\u8c61\u7c7b\u5b58\u5728\u7684\u610f\u4e49\u662f\u4ec0\u4e48\uff1f<\/p>\n<\/blockquote>\n\n\n\n
        \n
      1. \u62bd\u8c61\u7c7b\u53ef\u4ee5\u66f4\u597d\u7684\u53bb\u8868\u793a\u73b0\u5b9e\u4e16\u754c\u4e2d\uff0c\u6ca1\u6709\u5b9e\u4f8b\u5bf9\u8c61\u5bf9\u5e94\u7684\u62bd\u8c61\u7c7b\u578b\uff0c\u6bd4\u5982\uff1a\u690d\u7269\u3001\u4eba\u3001\u52a8\u7269\u7b49\u3002<\/li>\n\n\n\n
      2. \u62bd\u8c61\u7c7b\u5f88\u597d\u7684\u4f53\u73b0\u4e86\u865a\u51fd\u6570\u7684\u7ee7\u627f\u662f\u4e00\u79cd\u63a5\u53e3\u7ee7\u627f\uff0c\u5f3a\u5236\u5b50\u7c7b\u53bb\u91cd\u5199\u7eaf\u865a\u51fd\u6570\uff0c\u56e0\u4e3a\u5b50\u7c7b\u82e5\u662f\u4e0d\u91cd\u5199\u4ece\u7236\u7c7b\u7ee7\u627f\u4e0b\u6765\u7684\u7eaf\u865a\u51fd\u6570\uff0c\u90a3\u4e48\u5b50\u7c7b\u4e5f\u662f\u62bd\u8c61\u7c7b\u4e5f\u4e0d\u80fd\u5b9e\u4f8b\u5316\u51fa\u5bf9\u8c61\u3002<\/li>\n<\/ol>\n\n\n\n
        \u63a5\u53e3\u7ee7\u627f\u548c\u5b9e\u73b0\u7ee7\u627f<\/h3>\n\n\n\n
        \u5b9e\u73b0\u7ee7\u627f\uff1a<\/strong> \u666e\u901a\u51fd\u6570\u7684\u7ee7\u627f\u662f\u4e00\u79cd\u5b9e\u73b0\u7ee7\u627f\uff0c\u6d3e\u751f\u7c7b\u7ee7\u627f\u4e86\u57fa\u7c7b\u51fd\u6570\u7684\u5b9e\u73b0\uff0c\u53ef\u4ee5\u4f7f\u7528\u8be5\u51fd\u6570\u3002<\/p>\n\n\n\n
        \u63a5\u53e3\u7ee7\u627f\uff1a<\/strong> \u865a\u51fd\u6570\u7684\u7ee7\u627f\u662f\u4e00\u79cd\u63a5\u53e3\u7ee7\u627f\uff0c\u6d3e\u751f\u7c7b\u7ee7\u627f\u7684\u662f\u57fa\u7c7b\u865a\u51fd\u6570\u7684\u63a5\u53e3\uff0c\u76ee\u7684\u662f\u4e3a\u4e86\u91cd\u5199\uff0c\u8fbe\u6210\u591a\u6001\u3002<\/p>\n\n\n\n
        \u5efa\u8bae\uff1a<\/strong> \u6240\u4ee5\u5982\u679c\u4e0d\u5b9e\u73b0\u591a\u6001\uff0c\u5c31\u4e0d\u8981\u628a\u51fd\u6570\u5b9a\u4e49\u6210\u865a\u51fd\u6570\u3002<\/p>\n\n\n\n
        \u591a\u6001\u7684\u539f\u7406<\/h2>\n\n\n\n
        \u865a\u51fd\u6570\u8868<\/h3>\n\n\n\n
        \n
        \u4e0b\u9762\u662f\u4e00\u9053\u5e38\u8003\u7684\u7b14\u8bd5\u9898\uff1aBase\u7c7b\u5b9e\u4f8b\u5316\u51fa\u5bf9\u8c61\u7684\u5927\u5c0f\u662f\u591a\u5c11\uff1f<\/p>\n<\/blockquote>\n\n\n\n
        class Base\n{\npublic:\n    virtual void Func1()\n    {\n        cout << \"Func1()\" << endl;\n    }\nprivate:\n    int _b = 1;\n};<\/code><\/pre>\n\n\n\n
        \u901a\u8fc7\u89c2\u5bdf\u6d4b\u8bd5\uff0c\u6211\u4eec\u53d1\u73b0Base\u7c7b\u5b9e\u4f8b\u5316\u7684\u5bf9\u8c61b\u7684\u5927\u5c0f\u662f8\u4e2a\u5b57\u8282\u3002<\/p>\n\n\n\n
        int main()\n{\n    Base b;\n    cout << sizeof(b) << endl; \/\/8\n    return 0;\n}<\/code><\/pre>\n\n\n\n
        b\u5bf9\u8c61\u5f53\u4e2d\u9664\u4e86_b\u6210\u5458\u5916\uff0c\u5b9e\u9645\u4e0a\u8fd8\u6709\u4e00\u4e2a_vfptr\u653e\u5728\u5bf9\u8c61\u7684\u524d\u9762\uff08\u6709\u4e9b\u5e73\u53f0\u53ef\u80fd\u4f1a\u653e\u5230\u5bf9\u8c61\u7684\u6700\u540e\u9762\uff0c\u8fd9\u4e2a\u8ddf\u5e73\u53f0\u6709\u5173\uff09\u3002<\/p>\n\n\n\n
        \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/<\/div><\/figure>\n\n\n\n
        \u5bf9\u8c61\u4e2d\u7684\u8fd9\u4e2a\u6307\u9488\u53eb\u505a\u865a\u51fd\u6570\u8868\u6307\u9488\uff0c\u7b80\u79f0\u865a\u8868\u6307\u9488\uff0c\u865a\u8868\u6307\u9488\u6307\u5411\u4e00\u4e2a\u865a\u51fd\u6570\u8868\uff0c\u7b80\u79f0\u865a\u8868\uff0c\u6bcf\u4e00\u4e2a\u542b\u6709\u865a\u51fd\u6570\u7684\u7c7b\u4e2d\u90fd\u81f3\u5c11\u6709\u4e00\u4e2a\u865a\u8868\u6307\u9488\u3002<\/p>\n\n\n\n
        \n
        \u865a\u51fd\u6570\u8868\u4e2d\u5230\u5e95\u653e\u7684\u662f\u4ec0\u4e48\uff1f<\/p>\n<\/blockquote>\n\n\n\n
        \u4e0b\u9762Base\u7c7b\u5f53\u4e2d\u6709\u4e09\u4e2a\u6210\u5458\u51fd\u6570\uff0c\u5176\u4e2dFunc1\u548cFunc2\u662f\u865a\u51fd\u6570\uff0cFunc3\u662f\u666e\u901a\u6210\u5458\u51fd\u6570\uff0c\u5b50\u7c7bDerive\u5f53\u4e2d\u4ec5\u5bf9\u7236\u7c7b\u7684Func1\u51fd\u6570\u8fdb\u884c\u4e86\u91cd\u5199\u3002<\/p>\n\n\n\n
        #include <iostream>\nusing namespace std;\n\/\/\u7236\u7c7b\nclass Base\n{\npublic:\n    \/\/\u865a\u51fd\u6570\n    virtual void Func1()\n    {\n        cout << \"Base::Func1()\" << endl;\n    }\n    \/\/\u865a\u51fd\u6570\n    virtual void Func2()\n    {\n        cout << \"Base::Func2()\" << endl;\n    }\n    \/\/\u666e\u901a\u6210\u5458\u51fd\u6570\n    void Func3()\n    {\n        cout << \"Base::Func3()\" << endl;\n    }\nprivate:\n    int _b = 1;\n};\n\/\/\u5b50\u7c7b\nclass Derive : public Base\n{\npublic:\n    \/\/\u91cd\u5199\u865a\u51fd\u6570Func1\n    virtual void Func1()\n    {\n        cout << \"Derive::Func1()\" << endl;\n    }\nprivate:\n    int _d = 2;\n};\nint main()\n{\n    Base b;\n    Derive d;\n    return 0;\n}<\/code><\/pre>\n\n\n\n
        \u901a\u8fc7\u8c03\u8bd5\u53ef\u4ee5\u53d1\u73b0\uff0c\u7236\u7c7b\u5bf9\u8c61b\u548c\u57fa\u7c7b\u5bf9\u8c61d\u5f53\u4e2d\u9664\u4e86\u81ea\u5df1\u7684\u6210\u5458\u53d8\u91cf\u4e4b\u5916\uff0c\u7236\u7c7b\u548c\u5b50\u7c7b\u5bf9\u8c61\u90fd\u6709\u4e00\u4e2a\u865a\u8868\u6307\u9488\uff0c\u5206\u522b\u6307\u5411\u5c5e\u4e8e\u81ea\u5df1\u7684\u865a\u8868\u3002\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n\n\n\n
        \u5b9e\u9645\u4e0a\u865a\u8868\u5f53\u4e2d\u5b58\u50a8\u7684\u5c31\u662f\u865a\u51fd\u6570\u7684\u5730\u5740\uff0c\u56e0\u4e3a\u7236\u7c7b\u5f53\u4e2d\u7684Func1\u548cFunc2\u90fd\u662f\u865a\u51fd\u6570\uff0c\u6240\u4ee5\u7236\u7c7b\u5bf9\u8c61b\u7684\u865a\u8868\u5f53\u4e2d\u5b58\u50a8\u7684\u5c31\u662f\u865a\u51fd\u6570Func1\u548cFunc2\u7684\u5730\u5740\u3002<\/p>\n\n\n\n
        \u800c\u5b50\u7c7b\u867d\u7136\u7ee7\u627f\u4e86\u7236\u7c7b\u7684\u865a\u51fd\u6570Func1\u548cFunc2\uff0c\u4f46\u662f\u5b50\u7c7b\u5bf9\u7236\u7c7b\u7684\u865a\u51fd\u6570Func1\u8fdb\u884c\u4e86\u91cd\u5199\uff0c\u56e0\u6b64\uff0c\u5b50\u7c7b\u5bf9\u8c61d\u7684\u865a\u8868\u5f53\u4e2d\u5b58\u50a8\u7684\u662f\u7236\u7c7b\u7684\u865a\u51fd\u6570Func2\u7684\u5730\u5740\u548c\u91cd\u5199\u7684Func1\u7684\u5730\u5740\u3002\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u865a\u51fd\u6570\u7684\u91cd\u5199\u4e5f\u53eb\u505a\u8986\u76d6\uff0c\u8986\u76d6\u5c31\u662f\u6307\u865a\u8868\u4e2d\u865a\u51fd\u6570\u5730\u5740\u7684\u8986\u76d6\uff0c\u91cd\u5199\u662f\u8bed\u6cd5\u7684\u53eb\u6cd5\uff0c\u8986\u76d6\u662f\u539f\u7406\u5c42\u7684\u53eb\u6cd5\u3002<\/p>\n\n\n\n
        \u5176\u6b21\u9700\u8981\u6ce8\u610f\u7684\u662f\uff1aFunc2\u662f\u865a\u51fd\u6570\uff0c\u6240\u4ee5\u7ee7\u627f\u4e0b\u6765\u540e\u653e\u8fdb\u4e86\u5b50\u7c7b\u7684\u865a\u8868\uff0c\u800cFunc3\u662f\u666e\u901a\u6210\u5458\u51fd\u6570\uff0c\u7ee7\u627f\u4e0b\u6765\u540e\u4e0d\u4f1a\u653e\u8fdb\u5b50\u7c7b\u7684\u865a\u8868\u3002\u6b64\u5916\uff0c\u865a\u51fd\u6570\u8868\u672c\u8d28\u662f\u4e00\u4e2a\u5b58\u865a\u51fd\u6570\u6307\u9488\u7684\u6307\u9488\u6570\u7ec4\uff0c\u4e00\u822c\u60c5\u51b5\u4e0b\u4f1a\u5728\u8fd9\u4e2a\u6570\u7ec4\u6700\u540e\u653e\u4e00\u4e2anullptr\u3002<\/p>\n\n\n\n
        \n
        \u603b\u7ed3\u4e00\u4e0b\uff0c\u6d3e\u751f\u7c7b\u7684\u865a\u8868\u751f\u6210\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n<\/blockquote>\n\n\n\n
          \n
        1. \u5148\u5c06\u57fa\u7c7b\u4e2d\u7684\u865a\u8868\u5185\u5bb9\u62f7\u8d1d\u4e00\u4efd\u5230\u6d3e\u751f\u7c7b\u7684\u865a\u8868\u3002<\/li>\n\n\n\n
        2. \u5982\u679c\u6d3e\u751f\u7c7b\u91cd\u5199\u4e86\u57fa\u7c7b\u4e2d\u7684\u67d0\u4e2a\u865a\u51fd\u6570\uff0c\u5219\u7528\u6d3e\u751f\u7c7b\u81ea\u5df1\u7684\u865a\u51fd\u6570\u5730\u5740\u8986\u76d6\u865a\u8868\u4e2d\u57fa\u7c7b\u7684\u865a\u51fd\u6570\u5730\u5740\u3002<\/li>\n\n\n\n
        3. \u6d3e\u751f\u7c7b\u81ea\u5df1\u65b0\u589e\u52a0\u7684\u865a\u51fd\u6570\u6309\u5176\u5728\u6d3e\u751f\u7c7b\u4e2d\u7684\u58f0\u660e\u6b21\u5e8f\u589e\u52a0\u5230\u6d3e\u751f\u7c7b\u865a\u8868\u7684\u6700\u540e\u3002<\/li>\n<\/ol>\n\n\n\n
          \n
          \u865a\u8868\u662f\u4ec0\u4e48\u9636\u6bb5\u521d\u59cb\u5316\u7684\uff1f\u865a\u51fd\u6570\u5b58\u5728\u54ea\u91cc\uff1f\u865a\u8868\u5b58\u5728\u54ea\u91cc\uff1f<\/p>\n<\/blockquote>\n\n\n\n
          \u865a\u8868\u5b9e\u9645\u4e0a\u662f\u5728\u6784\u9020\u51fd\u6570\u521d\u59cb\u5316\u5217\u8868\u9636\u6bb5<\/strong>\u8fdb\u884c\u521d\u59cb\u5316\u7684\uff0c\u6ce8\u610f\u865a\u8868\u5f53\u4e2d\u5b58\u7684\u662f\u865a\u51fd\u6570\u7684\u5730\u5740\u4e0d\u662f\u865a\u51fd\u6570\uff0c\u865a\u51fd\u6570\u548c\u666e\u901a\u51fd\u6570\u4e00\u6837\uff0c\u90fd\u662f\u5b58\u5728\u4ee3\u7801\u6bb5\u7684\uff0c\u53ea\u662f\u4ed6\u7684\u5730\u5740\u53c8\u5b58\u5230\u4e86\u865a\u8868\u5f53\u4e2d\u3002\u53e6\u5916\uff0c\u5bf9\u8c61\u4e2d\u5b58\u7684\u4e0d\u662f\u865a\u8868\u800c\u662f\u6307\u5411\u865a\u8868\u7684\u6307\u9488\u3002
          \u81f3\u4e8e\u865a\u8868\u662f\u5b58\u5728\u54ea\u91cc\u7684\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u8fd9\u6bb5\u4ee3\u7801\u8fdb\u884c\u5224\u65ad\u3002<\/p>\n\n\n\n
          int j = 0;\nint main()\n{\n    Base b;\n    Base* p = &b;\n    printf(\"vfptr:%p\\n\", *((int*)p)); \/\/000FDCAC\n    int i = 0;\n    printf(\"\u6808\u4e0a\u5730\u5740:%p\\n\", &i);       \/\/005CFE24\n    printf(\"\u6570\u636e\u6bb5\u5730\u5740:%p\\n\", &j);     \/\/0010038C\n\n    int* k = new int;\n    printf(\"\u5806\u4e0a\u5730\u5740:%p\\n\", k);       \/\/00A6CA00\n    char* cp = \"hello world\";\n    printf(\"\u4ee3\u7801\u6bb5\u5730\u5740:%p\\n\", cp);    \/\/000FDCB4\n    return 0;\n}<\/code><\/pre>\n\n\n\n
          \u4ee3\u7801\u5f53\u4e2d\u6253\u5370\u4e86\u5bf9\u8c61b\u5f53\u4e2d\u7684\u865a\u8868\u6307\u9488\uff0c\u4e5f\u5c31\u662f\u865a\u8868\u7684\u5730\u5740\uff0c\u53ef\u4ee5\u53d1\u73b0\u865a\u8868\u5730\u5740\u4e0e\u4ee3\u7801\u6bb5\u7684\u5730\u5740\u975e\u5e38\u63a5\u8fd1\uff0c\u7531\u6b64\u6211\u4eec\u53ef\u4ee5\u5f97\u51fa\u865a\u8868\u5b9e\u9645\u4e0a\u662f\u5b58\u5728\u4ee3\u7801\u6bb5\u7684\u3002<\/p>\n\n\n\n
          \u591a\u6001\u7684\u539f\u7406<\/h3>\n\n\n\n
          \n
          \u90a3\u5230\u5e95\u591a\u6001\u7684\u539f\u7406\u662f\u4ec0\u4e48\uff1f<\/p>\n<\/blockquote>\n\n\n\n
          \u4f8b\u5982\uff0c\u4e0b\u9762\u4ee3\u7801\u4e2d\uff0c\u4e3a\u4ec0\u4e48\u5f53\u7236\u7c7bPerson\u6307\u9488\u6307\u5411\u7684\u662f\u7236\u7c7b\u5bf9\u8c61Mike\u65f6\uff0c\u8c03\u7528\u7684\u5c31\u662f\u7236\u7c7b\u7684BuyTicket\uff0c\u5f53\u7236\u7c7bPerson\u6307\u9488\u6307\u5411\u7684\u662f\u5b50\u7c7b\u5bf9\u8c61Johnson\u65f6\uff0c\u8c03\u7528\u7684\u5c31\u662f\u5b50\u7c7b\u7684BuyTicket?<\/p>\n\n\n\n
          #include <iostream>\nusing namespace std;\n\/\/\u7236\u7c7b\nclass Person\n{\npublic:\n    virtual void BuyTicket()\n    {\n        cout << \"\u4e70\u7968-\u5168\u4ef7\" << endl;\n    }\n    int _p = 1;\n};\n\/\/\u5b50\u7c7b\nclass Student : public Person\n{\npublic:\n    virtual void BuyTicket()\n    {\n        cout << \"\u4e70\u7968-\u534a\u4ef7\" << endl;\n    }\n    int _s = 2;\n};\nint main()\n{\n    Person Mike;\n    Student Johnson;\n    Johnson._p = 3; \/\/\u4ee5\u4fbf\u89c2\u5bdf\u662f\u5426\u5b8c\u6210\u5207\u7247\n    Person* p1 = &Mike;\n    Person* p2 = &Johnson;\n    p1->BuyTicket(); \/\/\u4e70\u7968-\u5168\u4ef7\n    p2->BuyTicket(); \/\/\u4e70\u7968-\u534a\u4ef7\n    return 0;\n}<\/code><\/pre>\n\n\n\n
          \u901a\u8fc7\u8c03\u8bd5\u53ef\u4ee5\u53d1\u73b0\uff0c\u5bf9\u8c61Mike\u4e2d\u5305\u542b\u4e00\u4e2a\u6210\u5458\u53d8\u91cf_p\u548c\u4e00\u4e2a\u865a\u8868\u6307\u9488\uff0c\u5bf9\u8c61Johnson\u4e2d\u5305\u542b\u4e24\u4e2a\u6210\u5458\u53d8\u91cf_p\u548c_s\u4ee5\u53ca\u4e00\u4e2a\u865a\u8868\u6307\u9488\uff0c\u8fd9\u4e24\u4e2a\u5bf9\u8c61\u5f53\u4e2d\u7684\u865a\u8868\u6307\u9488\u5206\u522b\u6307\u5411\u81ea\u5df1\u7684\u865a\u8868\u3002\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n\n\n\n
          \u56f4\u7ed5\u6b64\u56fe\u5206\u6790\u4fbf\u53ef\u5f97\u5230\u591a\u6001\u7684\u539f\u7406\uff1a<\/p>\n\n\n\n
            \n
          1. \u7236\u7c7b\u6307\u9488p1\u6307\u5411Mike\u5bf9\u8c61\uff0cp1->BuyTicket\u5728Mike\u7684\u865a\u8868\u4e2d\u627e\u5230\u7684\u865a\u51fd\u6570\u5c31\u662fPerson::BuyTicket\u3002<\/li>\n\n\n\n
          2. \u7236\u7c7b\u6307\u9488p2\u6307\u5411Johnson\u5bf9\u8c61\uff0cp2>BuyTicket\u5728Johnson\u7684\u865a\u8868\u4e2d\u627e\u5230\u7684\u865a\u51fd\u6570\u5c31\u662fStudent::BuyTicket\u3002<\/li>\n<\/ol>\n\n\n\n
            \u8fd9\u6837\u5c31\u5b9e\u73b0\u51fa\u4e86\u4e0d\u540c\u5bf9\u8c61\u53bb\u5b8c\u6210\u540c\u4e00\u884c\u4e3a\u65f6\uff0c\u5c55\u73b0\u51fa\u4e0d\u540c\u7684\u5f62\u6001\u3002<\/p>\n\n\n\n
            \n
            \u73b0\u5728\u60f3\u60f3\u591a\u6001\u6784\u6210\u7684\u4e24\u4e2a\u6761\u4ef6\uff0c\u4e00\u662f\u5b8c\u6210\u865a\u51fd\u6570\u7684\u91cd\u5199\uff0c\u4e8c\u662f\u5fc5\u987b\u4f7f\u7528\u7236\u7c7b\u7684\u6307\u9488\u6216\u8005\u5f15\u7528\u53bb\u8c03\u7528\u865a\u51fd\u6570\u3002\u5fc5\u987b\u5b8c\u6210\u865a\u51fd\u6570\u7684\u91cd\u5199\u662f\u56e0\u4e3a\u6211\u4eec\u9700\u8981\u5b8c\u6210\u5b50\u7c7b\u865a\u8868\u5f53\u4e2d\u865a\u51fd\u6570\u5730\u5740\u7684\u8986\u76d6\uff0c\u90a3\u4e3a\u4ec0\u4e48\u5fc5\u987b\u4f7f\u7528\u7236\u7c7b\u7684\u6307\u9488\u6216\u8005\u5f15\u7528\u53bb\u8c03\u7528\u865a\u51fd\u6570\u5462\uff1f\u4e3a\u4ec0\u4e48\u4f7f\u7528\u7236\u7c7b\u5bf9\u8c61\u53bb\u8c03\u7528\u865a\u51fd\u6570\u8fbe\u4e0d\u5230\u591a\u6001\u7684\u6548\u679c\u5462\uff1f<\/p>\n<\/blockquote>\n\n\n\n
            Person* p1 = &Mike;\nPerson* p2 = &Johnson;<\/code><\/pre>\n\n\n\n
            \u4f7f\u7528\u7236\u7c7b\u6307\u9488\u6216\u8005\u5f15\u7528\u65f6\uff0c\u5b9e\u9645\u4e0a\u662f\u4e00\u79cd\u5207\u7247\u884c\u4e3a\uff0c\u5207\u7247\u65f6\u53ea\u4f1a\u8ba9\u7236\u7c7b\u6307\u9488\u6216\u8005\u5f15\u7528\u5f97\u5230\u7236\u7c7b\u5bf9\u8c61\u6216\u5b50\u7c7b\u5bf9\u8c61\u4e2d\u5207\u51fa\u6765\u7684\u90a3\u4e00\u90e8\u5206\u3002\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n\n\n\n
            \u56e0\u6b64\uff0c\u6211\u4eec\u540e\u5e8f\u7528p1\u548cp2\u8c03\u7528\u865a\u51fd\u6570\u65f6\uff0cp1\u548cp2\u901a\u8fc7\u865a\u8868\u6307\u9488\u627e\u5230\u7684\u865a\u8868\u662f\u4e0d\u4e00\u6837\u7684\uff0c\u6700\u7ec8\u8c03\u7528\u7684\u51fd\u6570\u4e5f\u662f\u4e0d\u4e00\u6837\u7684\u3002<\/p>\n\n\n\n
            Person p1 = Mike;\nPerson p2 = Johnson;<\/code><\/pre>\n\n\n\n
            \u4f7f\u7528\u7236\u7c7b\u5bf9\u8c61\u65f6\uff0c\u5207\u7247\u5f97\u5230\u90e8\u5206\u6210\u5458\u53d8\u91cf\u540e\uff0c\u4f1a\u8c03\u7528\u7236\u7c7b\u7684\u62f7\u8d1d\u6784\u9020\u51fd\u6570\u5bf9\u90a3\u90e8\u5206\u6210\u5458\u53d8\u91cf\u8fdb\u884c\u62f7\u8d1d\u6784\u9020\uff0c\u800c\u62f7\u8d1d\u6784\u9020\u51fa\u6765\u7684\u7236\u7c7b\u5bf9\u8c61p1\u548cp2\u5f53\u4e2d\u7684\u865a\u8868\u6307\u9488\u6307\u5411\u7684\u90fd\u662f\u7236\u7c7b\u5bf9\u8c61\u7684\u865a\u8868\u3002\u56e0\u4e3a\u540c\u7c7b\u578b\u7684\u5bf9\u8c61\u5171\u4eab\u4e00\u5f20\u865a\u8868\uff0c\u4ed6\u4eec\u7684\u865a\u8868\u6307\u9488\u6307\u5411\u7684\u865a\u8868\u662f\u4e00\u6837\u7684\u3002\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n\n\n\n
            \u56e0\u6b64\uff0c\u6211\u4eec\u540e\u5e8f\u7528p1\u548cp2\u8c03\u7528\u865a\u51fd\u6570\u65f6\uff0cp1\u548cp2\u901a\u8fc7\u865a\u8868\u6307\u9488\u627e\u5230\u7684\u865a\u8868\u662f\u4e00\u6837\u7684\uff0c\u6700\u7ec8\u8c03\u7528\u7684\u51fd\u6570\u4e5f\u662f\u4e00\u6837\u7684\uff0c\u4e5f\u5c31\u65e0\u6cd5\u6784\u6210\u591a\u6001\u3002<\/p>\n\n\n\n
            \u603b\u7ed3\u4e00\u4e0b\uff1a<\/strong><\/p>\n\n\n\n
              \n
            1. \u6784\u6210\u591a\u6001\uff0c\u6307\u5411\u8c01\u5c31\u8c03\u7528\u8c01\u7684\u865a\u51fd\u6570\uff0c\u8ddf\u5bf9\u8c61\u6709\u5173\u3002<\/li>\n\n\n\n
            2. \u4e0d\u6784\u6210\u591a\u6001\uff0c\u5bf9\u8c61\u7c7b\u578b\u662f\u4ec0\u4e48\u5c31\u8c03\u7528\u8c01\u7684\u865a\u51fd\u6570\uff0c\u8ddf\u7c7b\u578b\u6709\u5173\u3002<\/li>\n<\/ol>\n\n\n\n
              \u52a8\u6001\u7ed1\u5b9a\u548c\u9759\u6001\u7ed1\u5b9a<\/h3>\n\n\n\n
              \u9759\u6001\u7ed1\u5b9a\uff1a<\/strong> \u9759\u6001\u7ed1\u5b9a\u53c8\u79f0\u4e3a\u524d\u671f\u7ed1\u5b9a(\u65e9\u7ed1\u5b9a)\uff0c\u5728\u7a0b\u5e8f\u7f16\u8bd1\u671f\u95f4\u786e\u5b9a\u4e86\u7a0b\u5e8f\u7684\u884c\u4e3a\uff0c\u4e5f\u6210\u4e3a\u9759\u6001\u591a\u6001\uff0c\u6bd4\u5982\uff1a\u51fd\u6570\u91cd\u8f7d\u3002<\/p>\n\n\n\n
              \u52a8\u6001\u7ed1\u5b9a\uff1a<\/strong> \u52a8\u6001\u7ed1\u5b9a\u53c8\u79f0\u4e3a\u540e\u671f\u7ed1\u5b9a(\u665a\u7ed1\u5b9a)\uff0c\u5728\u7a0b\u5e8f\u8fd0\u884c\u671f\u95f4\uff0c\u6839\u636e\u5177\u4f53\u62ff\u5230\u7684\u7c7b\u578b\u786e\u5b9a\u7a0b\u5e8f\u7684\u5177\u4f53\u884c\u4e3a\uff0c\u8c03\u7528\u5177\u4f53\u7684\u51fd\u6570\uff0c\u4e5f\u79f0\u4e3a\u52a8\u6001\u591a\u6001\u3002<\/p>\n\n\n\n
              \n
              \u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u67e5\u770b\u6c47\u7f16\u7684\u65b9\u5f0f\u8fdb\u4e00\u6b65\u7406\u89e3\u9759\u6001\u7ed1\u5b9a\u548c\u52a8\u6001\u7ed1\u5b9a\u3002<\/p>\n<\/blockquote>\n\n\n\n
              \u5bf9\u4e8e\u4e0b\u9762\u4ee3\u7801\uff1a<\/p>\n\n\n\n
              \/\/\u7236\u7c7b\nclass Person\n{\npublic:\n    virtual void BuyTicket()\n    {\n        cout << \"\u4e70\u7968-\u5168\u4ef7\" << endl;\n    }\n};\n\/\/\u5b50\u7c7b\nclass Student : public Person\n{\npublic:\n    virtual void BuyTicket()\n    {\n        cout << \"\u4e70\u7968-\u534a\u4ef7\" << endl;\n    }\n};<\/code><\/pre>\n\n\n\n
              \u6211\u4eec\u82e5\u662f\u6309\u7167\u5982\u4e0b\u65b9\u5f0f\u8c03\u7528BuyTicket\u51fd\u6570\uff0c\u5219\u4e0d\u6784\u6210\u591a\u6001\uff0c\u51fd\u6570\u7684\u8c03\u7528\u662f\u5728\u7f16\u8bd1\u65f6\u786e\u5b9a\u7684\u3002<\/p>\n\n\n\n
              int main()\n{\n    Student Johnson;\n    Person p = Johnson; \/\/\u4e0d\u6784\u6210\u591a\u6001\n    p.BuyTicket();\n    return 0;\n}<\/code><\/pre>\n\n\n\n
              \u5c06\u8c03\u7528\u51fd\u6570\u7684\u90a3\u53e5\u4ee3\u7801\u7ffb\u8bd1\u6210\u6c47\u7f16\u5c31\u53ea\u6709\u4ee5\u4e0b\u4e24\u6761\u6c47\u7f16\u6307\u4ee4\uff0c\u4e5f\u5c31\u662f\u76f4\u63a5\u8c03\u7528\u7684\u51fd\u6570\u3002\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n\n\n\n
              \u800c\u6211\u4eec\u82e5\u662f\u6309\u7167\u5982\u4e0b\u65b9\u5f0f\u8c03\u7528BuyTicket\u51fd\u6570\uff0c\u5219\u6784\u6210\u591a\u6001\uff0c\u51fd\u6570\u7684\u8c03\u7528\u662f\u5728\u8fd0\u884c\u65f6\u786e\u5b9a\u7684\u3002<\/p>\n\n\n\n
              int main()\n{\n    Student Johnson;\n    Person& p = Johnson; \/\/\u6784\u6210\u591a\u6001\n    p.BuyTicket();\n    return 0;\n}<\/code><\/pre>\n\n\n\n
              \u76f8\u6bd4\u4e0d\u6784\u6210\u591a\u6001\u65f6\u7684\u4ee3\u7801\uff0c\u6784\u6210\u591a\u6001\u65f6\u8c03\u7528\u51fd\u6570\u7684\u90a3\u53e5\u4ee3\u7801\u7ffb\u8bd1\u6210\u6c47\u7f16\u540e\u5c31\u53d8\u6210\u4e86\u516b\u6761\u6c47\u7f16\u6307\u4ee4\uff0c\u4e3b\u8981\u539f\u56e0\u5c31\u662f\u6211\u4eec\u9700\u8981\u5728\u8fd0\u884c\u65f6\uff0c\u5148\u5230\u6307\u5b9a\u5bf9\u8c61\u7684\u865a\u8868\u4e2d\u627e\u5230\u8981\u8c03\u7528\u7684\u865a\u51fd\u6570\uff0c\u7136\u540e\u624d\u80fd\u8fdb\u884c\u51fd\u6570\u7684\u8c03\u7528\u3002<\/p>\n\n\n\n
              \"\"\/<\/div><\/figure>\n\n\n\n
              \u8fd9\u6837\u5c31\u5f88\u597d\u7684\u4f53\u73b0\u4e86\u9759\u6001\u7ed1\u5b9a\u662f\u5728\u7f16\u8bd1\u65f6\u786e\u5b9a\u7684\uff0c\u800c\u52a8\u6001\u7ed1\u5b9a\u662f\u5728\u8fd0\u884c\u65f6\u786e\u5b9a\u7684\u3002<\/p>\n\n\n\n
              \u5355\u7ee7\u627f\u548c\u591a\u7ee7\u627f\u5173\u7cfb\u7684\u865a\u51fd\u6570\u8868<\/h2>\n\n\n\n
              \u5355\u7ee7\u627f\u4e2d\u7684\u865a\u51fd\u6570\u8868<\/h3>\n\n\n\n
              \u4ee5\u4e0b\u5217\u5355\u7ee7\u627f\u5173\u7cfb\u4e3a\u4f8b\uff0c\u6211\u4eec\u6765\u770b\u770b\u57fa\u7c7b\u548c\u6d3e\u751f\u7c7b\u7684\u865a\u8868\u6a21\u578b\u3002<\/p>\n\n\n\n
              \/\/\u57fa\u7c7b\nclass Base\n{\npublic:\n    virtual void func1() { cout << \"Base::func1()\" << endl; }\n    virtual void func2() { cout << \"Base::func2()\" << endl; }\nprivate:\n    int _a;\n};\n\/\/\u6d3e\u751f\u7c7b\nclass Derive : public Base\n{\npublic:\n    virtual void func1() { cout << \"Derive::func1()\" << endl; }\n    virtual void func3() { cout << \"Derive::func3()\" << endl; }\n    virtual void func4() { cout << \"Derive::func4()\" << endl; }\nprivate:\n    int _b;\n};<\/code><\/pre>\n\n\n\n
              \u5176\u4e2d\uff0c\u57fa\u7c7b\u548c\u6d3e\u751f\u7c7b\u5bf9\u8c61\u7684\u865a\u8868\u6a21\u578b\u5982\u4e0b\uff1a\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n\n\n\n
              \u5728\u5355\u7ee7\u627f\u5173\u7cfb\u5f53\u4e2d\uff0c\u6d3e\u751f\u7c7b\u7684\u865a\u8868\u751f\u6210\u8fc7\u7a0b\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                \n
              1. \u7ee7\u627f\u57fa\u7c7b\u7684\u865a\u8868\u5185\u5bb9\u5230\u6d3e\u751f\u7c7b\u7684\u865a\u8868\u3002<\/li>\n\n\n\n
              2. \u5bf9\u6d3e\u751f\u7c7b\u91cd\u5199\u4e86\u7684\u865a\u51fd\u6570\u5730\u5740\u8fdb\u884c\u8986\u76d6\uff0c\u6bd4\u5982func1\u3002<\/li>\n\n\n\n
              3. \u865a\u8868\u5f53\u4e2d\u65b0\u589e\u6d3e\u751f\u7c7b\u5f53\u4e2d\u65b0\u7684\u865a\u51fd\u6570\u5730\u5740\uff0c\u6bd4\u5982func3\u548cfunc4\u3002<\/li>\n<\/ol>\n\n\n\n
                \n
                \u5728\u8c03\u8bd5\u8fc7\u7a0b\u4e2d\uff0c\u67d0\u4e9b\u7f16\u8bd1\u5668\u7684\u76d1\u89c6\u7a97\u53e3\u5f53\u4e2d\u770b\u4e0d\u5230\u865a\u8868\u5f53\u4e2d\u7684func3\u548cfunc4\uff0c\u53ef\u80fd\u662f\u7f16\u8bd1\u5668\u7684\u76d1\u89c6\u7a97\u53e3\u6545\u610f\u9690\u85cf\u4e86\u8fd9\u4e24\u4e2a\u51fd\u6570\uff0c\u4e5f\u53ef\u4ee5\u8ba4\u4e3a\u8fd9\u662f\u4e00\u4e2a\u5c0fbug\uff0c\u6b64\u65f6\u5982\u679c\u6211\u4eec\u60f3\u8981\u770b\u5230\u6d3e\u751f\u7c7b\u5bf9\u8c61\u5b8c\u6574\u7684\u865a\u8868\u6709\u4e24\u4e2a\u65b9\u6cd5\u3002<\/p>\n<\/blockquote>\n\n\n\n
                \u4e00\u3001\u4f7f\u7528\u5185\u5b58\u76d1\u89c6\u7a97\u53e3<\/strong><\/p>\n\n\n\n
                \u4f7f\u7528\u5185\u5b58\u76d1\u89c6\u7a97\u53e3\u770b\u5230\u7684\u5185\u5bb9\u662f\u6700\u771f\u5b9e\u7684\uff0c\u6211\u4eec\u8c03\u51fa\u5185\u5b58\u76d1\u89c6\u7a97\u53e3\uff0c\u7136\u540e\u8f93\u5165\u6d3e\u751f\u7c7b\u5bf9\u8c61\u5f53\u4e2d\u7684\u865a\u8868\u6307\u9488\uff0c\u5373\u53ef\u770b\u5230\u865a\u8868\u5f53\u4e2d\u5b58\u50a8\u7684\u56db\u4e2a\u865a\u51fd\u6570\u5730\u5740\u3002 \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n\n\n\n
                \u4e8c\u3001\u4f7f\u7528\u4ee3\u7801\u6253\u5370\u865a\u8868\u5185\u5bb9<\/strong><\/p>\n\n\n\n
                \u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff0c\u6253\u5370\u4e0a\u8ff0\u57fa\u7c7b\u548c\u6d3e\u751f\u7c7b\u5bf9\u8c61\u7684\u865a\u8868\u5185\u5bb9\uff0c\u5728\u6253\u5370\u8fc7\u7a0b\u4e2d\u53ef\u4ee5\u987a\u4fbf\u7528\u865a\u51fd\u6570\u5730\u5740\u8c03\u7528\u5bf9\u5e94\u7684\u865a\u51fd\u6570\uff0c\u4ece\u800c\u6253\u5370\u51fa\u865a\u51fd\u6570\u7684\u51fd\u6570\u540d\uff0c\u8fd9\u6837\u53ef\u4ee5\u8fdb\u4e00\u6b65\u786e\u5b9a\u865a\u8868\u5f53\u4e2d\u5b58\u50a8\u7684\u662f\u54ea\u4e00\u4e2a\u51fd\u6570\u7684\u5730\u5740\u3002<\/p>\n\n\n\n
                typedef void(*VFPTR)(); \/\/\u865a\u51fd\u6570\u6307\u9488\u7c7b\u578b\u91cd\u547d\u540d\n\/\/\u6253\u5370\u865a\u8868\u5730\u5740\u53ca\u5176\u5185\u5bb9\nvoid PrintVFT(VFPTR* ptr)\n{\n    printf(\"\u865a\u8868\u5730\u5740:%p\\n\", ptr);\n    for (int i = 0; ptr[i] != nullptr; i++)\n    {\n        printf(\"ptr[%d]:%p-->\", i, ptr[i]); \/\/\u6253\u5370\u865a\u8868\u5f53\u4e2d\u7684\u865a\u51fd\u6570\u5730\u5740\n        ptr[i](); \/\/\u4f7f\u7528\u865a\u51fd\u6570\u5730\u5740\u8c03\u7528\u865a\u51fd\u6570\n    }\n    printf(\"\\n\");\n}\nint main()\n{\n    Base b;\n    PrintVFT((VFPTR*)(*(int*)&b)); \/\/\u6253\u5370\u57fa\u7c7b\u5bf9\u8c61b\u7684\u865a\u8868\u5730\u5740\u53ca\u5176\u5185\u5bb9\n    Derive d;\n    PrintVFT((VFPTR*)(*(int*)&d)); \/\/\u6253\u5370\u6d3e\u751f\u7c7b\u5bf9\u8c61d\u7684\u865a\u8868\u5730\u5740\u53ca\u5176\u5185\u5bb9\n    return 0;\n}<\/code><\/pre>\n\n\n\n
                \u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/<\/div><\/figure>\n\n\n\n
                \u591a\u7ee7\u627f\u4e2d\u7684\u865a\u51fd\u6570\u8868<\/h3>\n\n\n\n
                \u4ee5\u4e0b\u5217\u591a\u7ee7\u627f\u5173\u7cfb\u4e3a\u4f8b\uff0c\u6211\u4eec\u6765\u770b\u770b\u57fa\u7c7b\u548c\u6d3e\u751f\u7c7b\u7684\u865a\u8868\u6a21\u578b\u3002<\/p>\n\n\n\n
                \/\/\u57fa\u7c7b1\nclass Base1\n{\npublic:\n    virtual void func1() { cout << \"Base1::func1()\" << endl; }\n    virtual void func2() { cout << \"Base1::func2()\" << endl; }\nprivate:\n    int _b1;\n};\n\/\/\u57fa\u7c7b2\nclass Base2\n{\npublic:\n    virtual void func1() { cout << \"Base2::func1()\" << endl; }\n    virtual void func2() { cout << \"Base2::func2()\" << endl; }\nprivate:\n    int _b2;\n};\n\/\/\u591a\u7ee7\u627f\u6d3e\u751f\u7c7b\nclass Derive : public Base1, public Base2\n{\npublic:\n    virtual void func1() { cout << \"Derive::func1()\" << endl; }\n    virtual void func3() { cout << \"Derive::func3()\" << endl; }\nprivate:\n    int _d1;\n};<\/code><\/pre>\n\n\n\n
                \u5176\u4e2d\uff0c\u4e24\u4e2a\u57fa\u7c7b\u7684\u865a\u8868\u6a21\u578b\u5982\u4e0b\uff1a\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n\n\n\n
                \u800c\u6d3e\u751f\u7c7b\u7684\u865a\u8868\u6a21\u578b\u5c31\u4e0d\u90a3\u4e48\u7b80\u5355\u4e86\uff0c\u6d3e\u751f\u7c7b\u7684\u865a\u8868\u6a21\u578b\u5982\u4e0b\uff1a\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n\n\n\n
                \u5728\u591a\u7ee7\u627f\u5173\u7cfb\u5f53\u4e2d\uff0c\u6d3e\u751f\u7c7b\u7684\u865a\u8868\u751f\u6210\u8fc7\u7a0b\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                  \n
                1. \u5206\u522b\u7ee7\u627f\u5404\u4e2a\u57fa\u7c7b\u7684\u865a\u8868\u5185\u5bb9\u5230\u6d3e\u751f\u7c7b\u7684\u5404\u4e2a\u865a\u8868\u5f53\u4e2d\u3002<\/li>\n\n\n\n
                2. \u5bf9\u6d3e\u751f\u7c7b\u91cd\u5199\u4e86\u7684\u865a\u51fd\u6570\u5730\u5740\u8fdb\u884c\u8986\u76d6(\u6d3e\u751f\u7c7b\u4e2d\u7684\u5404\u4e2a\u865a\u8868\u4e2d\u5b58\u6709\u8be5\u88ab\u91cd\u5199\u865a\u51fd\u6570\u5730\u5740\u7684\u90fd\u9700\u8981\u8fdb\u884c\u8986\u76d6)\uff0c\u6bd4\u5982func1\u3002<\/li>\n\n\n\n
                3. \u5728\u6d3e\u751f\u7c7b\u7b2c\u4e00\u4e2a\u7ee7\u627f\u57fa\u7c7b\u90e8\u5206\u7684\u865a\u8868\u5f53\u4e2d\u65b0\u589e\u6d3e\u751f\u7c7b\u5f53\u4e2d\u65b0\u7684\u865a\u51fd\u6570\u5730\u5740\uff0c\u6bd4\u5982func3\u3002<\/li>\n<\/ol>\n\n\n\n
                  \n
                  \u8fd9\u91cc\u5728\u8c03\u8bd5\u65f6\uff0c\u5728\u67d0\u4e9b\u7f16\u8bd1\u5668\u4e0b\u4e5f\u4f1a\u51fa\u73b0\u663e\u793a\u4e0d\u5168\u7684\u95ee\u9898\uff0c\u6b64\u65f6\u5982\u679c\u6211\u4eec\u60f3\u8981\u770b\u5230\u6d3e\u751f\u7c7b\u5bf9\u8c61\u5b8c\u6574\u7684\u865a\u8868\u4e5f\u662f\u7528\u90a3\u4e24\u79cd\u65b9\u6cd5\u3002<\/p>\n<\/blockquote>\n\n\n\n
                  \u4e00\u3001\u4f7f\u7528\u5185\u5b58\u76d1\u89c6\u7a97\u53e3<\/strong>\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n\n\n\n
                  \u4e8c\u3001\u4f7f\u7528\u4ee3\u7801\u6253\u5370\u865a\u8868\u5185\u5bb9<\/strong><\/p>\n\n\n\n
                  \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u6211\u4eec\u5728\u6d3e\u751f\u7c7b\u7b2c\u4e00\u4e2a\u865a\u8868\u5730\u5740\u7684\u57fa\u7840\u4e0a\uff0c\u5411\u540e\u79fbsizeof(Base1)<\/code>\u4e2a\u5b57\u8282\u5373\u53ef\u5f97\u5230\u7b2c\u4e8c\u4e2a\u865a\u8868\u7684\u5730\u5740\u3002<\/p>\n\n\n\n
                  typedef void(*VFPTR)(); \/\/\u865a\u51fd\u6570\u6307\u9488\u7c7b\u578b\u91cd\u547d\u540d\n\/\/\u6253\u5370\u865a\u8868\u5730\u5740\u53ca\u5176\u5185\u5bb9\nvoid PrintVFT(VFPTR* ptr)\n{\n    printf(\"\u865a\u8868\u5730\u5740:%p\\n\", ptr);\n    for (int i = 0; ptr[i] != nullptr; i++)\n    {\n        printf(\"ptr[%d]:%p-->\", i, ptr[i]); \/\/\u6253\u5370\u865a\u8868\u5f53\u4e2d\u7684\u865a\u51fd\u6570\u5730\u5740\n        ptr[i](); \/\/\u4f7f\u7528\u865a\u51fd\u6570\u5730\u5740\u8c03\u7528\u865a\u51fd\u6570\n    }\n    printf(\"\\n\");\n}\nint main()\n{\n    Base1 b1;\n    Base2 b2;\n    PrintVFT((VFPTR*)(*(int*)&b1)); \/\/\u6253\u5370\u57fa\u7c7b\u5bf9\u8c61b1\u7684\u865a\u8868\u5730\u5740\u53ca\u5176\u5185\u5bb9\n    PrintVFT((VFPTR*)(*(int*)&b2)); \/\/\u6253\u5370\u57fa\u7c7b\u5bf9\u8c61b2\u7684\u865a\u8868\u5730\u5740\u53ca\u5176\u5185\u5bb9\n    Derive d;\n    PrintVFT((VFPTR*)(*(int*)&d)); \/\/\u6253\u5370\u6d3e\u751f\u7c7b\u5bf9\u8c61d\u7684\u7b2c\u4e00\u4e2a\u865a\u8868\u5730\u5740\u53ca\u5176\u5185\u5bb9\n    PrintVFT((VFPTR*)(*(int*)((char*)&d + sizeof(Base1)))); \/\/\u6253\u5370\u6d3e\u751f\u7c7b\u5bf9\u8c61d\u7684\u7b2c\u4e8c\u4e2a\u865a\u8868\u5730\u5740\u53ca\u5176\u5185\u5bb9\n    return 0;\n}<\/code><\/pre>\n\n\n\n
                  \u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                  \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/<\/div><\/figure>\n\n\n\n
                  \u200b<\/p>\n\n\n\n
                  \u83f1\u5f62\u7ee7\u627f\u3001\u83f1\u5f62\u865a\u62df\u7ee7\u627f<\/h3>\n\n\n\n
                  \u4ee5\u4e0b\u5217\u83f1\u5f62\u865a\u62df\u7ee7\u627f\u5173\u7cfb\u4e3a\u4f8b\uff0c\u6211\u4eec\u6765\u770b\u770b\u57fa\u7c7b\u548c\u6d3e\u751f\u7c7b\u7684\u865a\u8868\u6a21\u578b\u3002<\/p>\n\n\n\n
                  class A\n{\npublic:\n    virtual void funcA()\n    {\n        cout << \"A::funcA()\" << endl;\n    }\nprivate:\n    int _a;\n};\nclass B : virtual public A\n{\npublic:\n    virtual void funcA()\n    {\n        cout << \"B::funcA()\" << endl;\n    }\n    virtual void funcB()\n    {\n        cout << \"B::funcB()\" << endl;\n    }\nprivate:\n    int _b;\n};\nclass C : virtual public A\n{\npublic:\n    virtual void funcA()\n    {\n        cout << \"C::funcA()\" << endl;\n    }\n    virtual void funcC()\n    {\n        cout << \"C::funcC()\" << endl;\n    }\nprivate:\n    int _c;\n};\nclass D : public B, public C\n{\npublic:\n    virtual void funcA()\n    {\n        cout << \"D::funcA()\" << endl;\n    }\n    virtual void funcD()\n    {\n        cout << \"D::funcD()\" << endl;\n    }\nprivate:\n    int _d;\n};<\/code><\/pre>\n\n\n\n
                  \u4ee3\u7801\u5f53\u4e2d\u7684\u7ee7\u627f\u5173\u7cfb\u56fe\u5982\u4e0b\uff1a\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n\n\n\n
                  \u5176\u4e2d\uff0cA\u7c7b\u5f53\u4e2d\u6709\u4e00\u4e2a\u865a\u51fd\u6570funcA\uff0cB\u7c7b\u5f53\u4e2d\u6709\u4e00\u4e2a\u865a\u51fd\u6570funcB\uff0cC\u7c7b\u5f53\u4e2d\u6709\u4e00\u4e2a\u865a\u51fd\u6570funcC\uff0cD\u7c7b\u5f53\u4e2d\u6709\u4e00\u4e2a\u865a\u51fd\u6570funcD\u3002\u6b64\u5916B\u7c7b\u3001C\u7c7b\u548cD\u7c7b\u5f53\u4e2d\u5747\u5bf9A\u7c7b\u5f53\u4e2d\u7684funcA\u8fdb\u884c\u4e86\u91cd\u5199\u3002<\/p>\n\n\n\n
                  \n
                  A\u7c7b\u5bf9\u8c61\u5f53\u4e2d\u7684\u6210\u5458\u53ca\u5176\u5206\u5e03\u60c5\u51b5\u3002<\/p>\n<\/blockquote>\n\n\n\n
                  A\u7c7b\u5bf9\u8c61\u7684\u6210\u5458\u5305\u62ec\u4e00\u4e2a\u865a\u8868\u6307\u9488\u548c\u6210\u5458\u53d8\u91cf_a\uff0c\u865a\u8868\u6307\u9488\u6307\u5411\u7684\u865a\u8868\u5f53\u4e2d\u5b58\u50a8\u7684\u662fA\u7c7b\u865a\u51fd\u6570funcA\u7684\u5730\u5740\u3002\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n\n\n\n
                  \n
                  B\u7c7b\u5bf9\u8c61\u5f53\u4e2d\u7684\u6210\u5458\u53ca\u5176\u5206\u5e03\u60c5\u51b5\u3002<\/p>\n<\/blockquote>\n\n\n\n
                  B\u7c7b\u7531\u4e8e\u662f\u865a\u62df\u7ee7\u627f\u7684A\u7c7b\uff0c\u6240\u4ee5B\u7c7b\u5bf9\u8c61\u5f53\u4e2d\u5c06A\u7c7b\u7ee7\u627f\u4e0b\u6765\u7684\u6210\u5458\u653e\u5230\u4e86\u6700\u540e\uff0c\u9664\u6b64\u4e4b\u5916\uff0cB\u7c7b\u5bf9\u8c61\u7684\u6210\u5458\u8fd8\u5305\u62ec\u4e00\u4e2a\u865a\u8868\u6307\u9488\u3001\u4e00\u4e2a\u865a\u57fa\u8868\u6307\u9488\u548c\u6210\u5458\u53d8\u91cf_b\uff0c\u865a\u8868\u6307\u9488\u6307\u5411\u7684\u865a\u8868\u5f53\u4e2d\u5b58\u50a8\u7684\u662fB\u7c7b\u865a\u51fd\u6570funcB\u7684\u5730\u5740\u3002
                  \u865a\u57fa\u8868\u5f53\u4e2d\u5b58\u50a8\u7684\u662f\u4e24\u4e2a\u504f\u79fb\u91cf\uff0c\u7b2c\u4e00\u4e2a\u662f\u865a\u57fa\u8868\u6307\u9488\u8ddd\u79bbB\u865a\u8868\u6307\u9488\u7684\u504f\u79fb\u91cf\uff0c\u7b2c\u4e8c\u4e2a\u662f\u865a\u57fa\u8868\u6307\u9488\u8ddd\u79bb\u865a\u57fa\u7c7bA\u7684\u504f\u79fb\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n\n\n\n
                  \n
                  C\u7c7b\u5bf9\u8c61\u5f53\u4e2d\u7684\u6210\u5458\u53ca\u5176\u5206\u5e03\u60c5\u51b5\u3002<\/p>\n<\/blockquote>\n\n\n\n
                  C\u7c7b\u5bf9\u8c61\u5f53\u4e2d\u7684\u6210\u5458\u5206\u5e03\u60c5\u51b5\u4e0eB\u7c7b\u5bf9\u8c61\u5f53\u4e2d\u7684\u6210\u5458\u5206\u5e03\u60c5\u51b5\u76f8\u540c\u3002C\u7c7b\u4e5f\u662f\u865a\u62df\u7ee7\u627f\u7684A\u7c7b\uff0c\u6240\u4ee5C\u7c7b\u5bf9\u8c61\u5f53\u4e2d\u5c06A\u7c7b\u7ee7\u627f\u4e0b\u6765\u7684\u6210\u5458\u653e\u5230\u4e86\u6700\u540e\uff0c\u9664\u6b64\u4e4b\u5916\uff0cC\u7c7b\u5bf9\u8c61\u7684\u6210\u5458\u8fd8\u5305\u62ec\u4e00\u4e2a\u865a\u8868\u6307\u9488\u3001\u4e00\u4e2a\u865a\u57fa\u8868\u6307\u9488\u548c\u6210\u5458\u53d8\u91cf_c\uff0c\u865a\u8868\u6307\u9488\u6307\u5411\u7684\u865a\u8868\u5f53\u4e2d\u5b58\u50a8\u7684\u662fC\u7c7b\u865a\u51fd\u6570funcC\u7684\u5730\u5740\u3002
                  \u865a\u57fa\u8868\u5f53\u4e2d\u5b58\u50a8\u7684\u662f\u4e24\u4e2a\u504f\u79fb\u91cf\uff0c\u7b2c\u4e00\u4e2a\u662f\u865a\u57fa\u8868\u6307\u9488\u8ddd\u79bbC\u865a\u8868\u6307\u9488\u7684\u504f\u79fb\u91cf\uff0c\u7b2c\u4e8c\u4e2a\u662f\u865a\u57fa\u8868\u6307\u9488\u8ddd\u79bb\u865a\u57fa\u7c7bA\u7684\u504f\u79fb\u91cf\u3002\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n\n\n\n
                  \n
                  D\u7c7b\u5bf9\u8c61\u5f53\u4e2d\u7684\u6210\u5458\u53ca\u5176\u5206\u5e03\u60c5\u51b5\u3002<\/p>\n<\/blockquote>\n\n\n\n
                  D\u7c7b\u5bf9\u8c61\u5f53\u4e2d\u6210\u5458\u7684\u5206\u5e03\u60c5\u51b5\u8f83\u4e3a\u590d\u6742\uff0cD\u7c7b\u7684\u7ee7\u627f\u65b9\u5f0f\u662f\u83f1\u5f62\u865a\u62df\u7ee7\u627f\uff0c\u5728D\u7c7b\u5bf9\u8c61\u5f53\u4e2d\uff0c\u5c06A\u7c7b\u7ee7\u627f\u4e0b\u6765\u7684\u6210\u5458\u653e\u5230\u4e86\u6700\u540e\uff0c\u9664\u6b64\u4e4b\u5916\uff0cD\u7c7b\u5bf9\u8c61\u7684\u6210\u5458\u8fd8\u5305\u62ec\u4eceB\u7c7b\u7ee7\u627f\u4e0b\u6765\u7684\u6210\u5458\u3001\u4eceC\u7c7b\u7ee7\u627f\u4e0b\u6765\u7684\u6210\u5458\u548c\u6210\u5458\u53d8\u91cf_d\u3002
                  \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cD\u7c7b\u5bf9\u8c61\u5f53\u4e2d\u7684\u865a\u51fd\u6570funcD\u7684\u5730\u5740\u662f\u5b58\u50a8\u5230\u4e86B\u7c7b\u7684\u865a\u8868\u5f53\u4e2d\u3002\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n\n\n\n
                  \u53cb\u60c5\u63d0\u793a\uff1a<\/strong>
                  \u5b9e\u9645\u4e2d\u6211\u4eec\u4e0d\u5efa\u8bae\u8bbe\u8ba1\u51fa\u83f1\u5f62\u7ee7\u627f\u53ca\u83f1\u5f62\u865a\u62df\u7ee7\u627f\uff0c\u4e00\u65b9\u9762\u592a\u590d\u6742\u5bb9\u6613\u51fa\u95ee\u9898\uff0c\u53e6\u4e00\u65b9\u9762\u4f7f\u7528\u8fd9\u6837\u7684\u6a21\u578b\u8bbf\u95ee\u57fa\u7c7b\u6210\u5458\u6709\u4e00\u5b9a\u7684\u6027\u80fd\u635f\u8017\u3002<\/p>\n\n\n\n
                  \u7ee7\u627f\u548c\u591a\u6001\u5e38\u89c1\u7684\u9762\u8bd5\u95ee\u9898<\/h2>\n\n\n\n
                  \u6982\u5ff5\u8003\u5bdf<\/h3>\n\n\n\n
                  \n
                  1\u3001\u4e0b\u9762\u54ea\u79cd\u9762\u5411\u5bf9\u8c61\u7684\u65b9\u6cd5\u53ef\u4ee5\u8ba9\u4f60\u53d8\u5f97\u5bcc\u6709\uff08\uff09<\/p>\n<\/blockquote>\n\n\n\n
                  A.\u7ee7\u627f\u2003B.\u5c01\u88c5\u2003C.\u591a\u6001\u2003D.\u62bd\u8c61<\/p>\n\n\n\n
                  \n
                  2\u3001\uff08\uff09\u662f\u9762\u5411\u5bf9\u8c61\u7a0b\u5e8f\u8bbe\u8ba1\u8bed\u8a00\u4e2d\u7684\u4e00\u79cd\u673a\u5236\uff0c\u8fd9\u79cd\u673a\u5236\u5b9e\u73b0\u4e86\u65b9\u6cd5\u7684\u5b9a\u4e49\u4e0e\u5177\u4f53\u7684\u5bf9\u8c61\u65e0\u5173\uff0c\u800c\u65b9\u6cd5\u7684\u8c03\u7528\u5219\u53ef\u4ee5\u5173\u8054\u4e8e\u5177\u4f53\u7684\u5bf9\u8c61\u3002<\/p>\n<\/blockquote>\n\n\n\n
                  A.\u7ee7\u627f\u2003B.\u6a21\u677f\u2003C.\u5bf9\u8c61\u7684\u81ea\u8eab\u5f15\u7528\u2003D.\u52a8\u6001\u7ed1\u5b9a<\/p>\n\n\n\n
                  \n
                  3\u3001\u5173\u4e8e\u9762\u5411\u5bf9\u8c61\u8bbe\u8ba1\u4e2d\u7684\u7ee7\u627f\u548c\u7ec4\u5408\uff0c\u4e0b\u9762\u8bf4\u6cd5\u9519\u8bef\u7684\u662f\uff08\uff09<\/p>\n<\/blockquote>\n\n\n\n
                  A.\u7ee7\u627f\u5141\u8bb8\u6211\u4eec\u8986\u76d6\u91cd\u5199\u7236\u7c7b\u7684\u5b9e\u73b0\u7ec6\u8282\uff0c\u7236\u7c7b\u7684\u5b9e\u73b0\u5bf9\u4e8e\u5b50\u7c7b\u662f\u53ef\u89c1\u7684\uff0c\u662f\u4e00\u79cd\u9759\u6001\u590d\u7528\uff0c\u4e5f\u79f0\u4e3a\u767d\u76d2\u590d\u7528\u3002
                  B.\u7ec4\u5408\u7684\u5bf9\u8c61\u4e0d\u9700\u8981\u5173\u7cfb\u5404\u81ea\u7684\u5b9e\u73b0\u7ec6\u8282\uff0c\u4e4b\u95f4\u7684\u5173\u7cfb\u662f\u5728\u8fd0\u884c\u65f6\u5019\u624d\u786e\u5b9a\u7684\uff0c\u662f\u4e00\u79cd\u52a8\u6001\u590d\u7528\uff0c\u4e5f\u79f0\u4e3a\u9ed1\u76d2\u590d\u7528\u3002
                  C.\u4f18\u5148\u4f7f\u7528\u7ee7\u627f\uff0c\u800c\u4e0d\u662f\u7ec4\u5408\uff0c\u662f\u9762\u5411\u5bf9\u8c61\u8bbe\u8ba1\u7684\u7b2c\u4e8c\u539f\u5219\u3002
                  D.\u7ee7\u627f\u53ef\u4ee5\u4f7f\u5b50\u7c7b\u80fd\u81ea\u52a8\u7ee7\u627f\u7236\u7c7b\u7684\u63a5\u53e3\uff0c\u4f46\u5728\u8bbe\u8ba1\u6a21\u5f0f\u4e2d\u8ba4\u4e3a\u8fd9\u662f\u4e00\u79cd\u7834\u574f\u4e86\u7236\u7c7b\u7684\u5c01\u88c5\u6027\u7684\u8868\u73b0\u3002<\/p>\n\n\n\n
                  \n
                  4\u3001\u4ee5\u4e0b\u5173\u4e8e\u7eaf\u865a\u51fd\u6570\u7684\u8bf4\u6cd5\uff0c\u6b63\u786e\u7684\u662f\uff08\uff09<\/p>\n<\/blockquote>\n\n\n\n
                  A.\u58f0\u660e\u7eaf\u865a\u51fd\u6570\u7684\u7c7b\u4e0d\u80fd\u5b9e\u4f8b\u5316\u5bf9\u8c61
                  B.\u58f0\u660e\u7eaf\u865a\u51fd\u6570\u7684\u7c7b\u662f\u865a\u57fa\u7c7b
                  C.\u5b50\u7c7b\u5fc5\u987b\u5b9e\u73b0\u57fa\u7c7b\u7684\u7eaf\u865a\u51fd\u6570
                  D.\u7eaf\u865a\u51fd\u6570\u5fc5\u987b\u662f\u7a7a\u51fd\u6570<\/p>\n\n\n\n
                  \n
                  5\u3001\u5173\u4e8e\u865a\u51fd\u6570\u7684\u63cf\u8ff0\u6b63\u786e\u7684\u662f\uff08\uff09<\/p>\n<\/blockquote>\n\n\n\n
                  A.\u6d3e\u751f\u7c7b\u7684\u865a\u51fd\u6570\u4e0e\u57fa\u7c7b\u7684\u865a\u51fd\u6570\u5177\u6709\u4e0d\u540c\u7684\u53c2\u6570\u4e2a\u6570\u548c\u7c7b\u578b
                  B.\u5185\u8054\u51fd\u6570\u4e0d\u80fd\u662f\u865a\u51fd\u6570
                  C.\u6d3e\u751f\u7c7b\u5fc5\u987b\u91cd\u65b0\u5b9a\u4e49\u57fa\u7c7b\u7684\u865a\u51fd\u6570
                  D.\u865a\u51fd\u6570\u53ef\u4ee5\u662f\u4e00\u4e2astatic\u578b\u7684\u51fd\u6570<\/p>\n\n\n\n
                  \n
                  6\u3001\u5173\u4e8e\u865a\u8868\u7684\u8bf4\u6cd5\u6b63\u786e\u7684\u662f\uff08\uff09<\/p>\n<\/blockquote>\n\n\n\n
                  A.\u4e00\u4e2a\u7c7b\u53ea\u80fd\u6709\u4e00\u5f20\u865a\u8868
                  B.\u57fa\u7c7b\u4e2d\u6709\u865a\u51fd\u6570\uff0c\u5982\u679c\u5b50\u7c7b\u4e2d\u6ca1\u6709\u91cd\u5199\u57fa\u7c7b\u7684\u865a\u51fd\u6570\uff0c\u6b64\u65f6\u5b50\u7c7b\u4e0e\u57fa\u7c7b\u5171\u7528\u540c\u4e00\u5f20\u865a\u8868
                  C.\u865a\u8868\u662f\u5728\u8fd0\u884c\u671f\u95f4\u52a8\u6001\u751f\u6210\u7684
                  D.\u4e00\u4e2a\u7c7b\u7684\u4e0d\u540c\u5bf9\u8c61\u5171\u4eab\u8be5\u7c7b\u7684\u865a\u8868<\/p>\n\n\n\n
                  \n
                  7\u3001\u5047\u8bbeA\u7c7b\u4e2d\u6709\u865a\u51fd\u6570\uff0cB\u7ee7\u627f\u81eaA\uff0cB\u91cd\u5199A\u4e2d\u7684\u865a\u51fd\u6570\uff0c\u4e5f\u6ca1\u6709\u5b9a\u4e49\u4efb\u4f55\u865a\u51fd\u6570\uff0c\u5219\uff08\uff09<\/p>\n<\/blockquote>\n\n\n\n
                  A.A\u7c7b\u5bf9\u8c61\u7684\u524d4\u4e2a\u5b57\u8282\u5b58\u50a8\u865a\u8868\u5730\u5740\uff0cB\u7c7b\u5bf9\u8c61\u7684\u524d4\u4e2a\u5b57\u8282\u4e0d\u662f\u865a\u8868\u5730\u5740
                  B.A\u7c7b\u5bf9\u8c61\u548cB\u7c7b\u5bf9\u8c61\u524d4\u4e2a\u5b57\u8282\u5b58\u50a8\u7684\u90fd\u662f\u865a\u57fa\u8868\u7684\u5730\u5740
                  C.A\u7c7b\u5bf9\u8c61\u548cB\u7c7b\u5bf9\u8c61\u524d4\u4e2a\u5b57\u8282\u5b58\u50a8\u7684\u865a\u8868\u5730\u5740\u76f8\u540c
                  D.A\u7c7b\u548cB\u7c7b\u865a\u8868\u4e2d\u865a\u51fd\u6570\u4e2a\u6570\u76f8\u540c\uff0c\u4f46A\u7c7b\u548cB\u7c7b\u4f7f\u7528\u7684\u4e0d\u662f\u540c\u4e00\u5f20\u865a\u8868<\/p>\n\n\n\n
                  \n
                  8\u3001\u4e0b\u9762\u7a0b\u5e8f\u8f93\u51fa\u7ed3\u679c\u662f\u4ec0\u4e48\uff1f<\/p>\n<\/blockquote>\n\n\n\n
                  #include <iostream>\nusing namespace std;\nclass A\n{\npublic:\n    A(char* s) { cout << s << endl; }\n    ~A() {};\n};\nclass B : virtual public A\n{\npublic:\n    B(char* s1, char* s2)\n        :A(s1)\n    {\n        cout << s2 << endl;\n    }\n};\nclass C : virtual public A\n{\npublic:\n    C(char* s1, char* s2)\n        :A(s1)\n    {\n        cout << s2 << endl;\n    }\n};\nclass D : public B, public C\n{\npublic:\n    D(char* s1, char* s2, char* s3, char* s4)\n        :B(s1, s2)\n        , C(s1, s3)\n        , A(s1)\n    {\n        cout << s4 << endl;\n    }\n};\nint main()\n{\n    D* p = new D(\"class A\", \"class B\", \"class C\", \"class D\");\n    delete p;\n    return 0;\n}<\/code><\/pre>\n\n\n\n
                  A.class A\u2003class B\u2003class C\u2003class D
                  B.class D\u2003class B\u2003class C\u2003class A
                  C.class D\u2003class C\u2003class B\u2003class A
                  D.class A\u2003class C\u2003class C\u2003class D<\/p>\n\n\n\n
                  \n
                  9\u3001\u4e0b\u9762\u8bf4\u6cd5\u6b63\u786e\u7684\u662f\uff1f\uff08\u591a\u7ee7\u627f\u4e2d\u6307\u9488\u7684\u504f\u79fb\u95ee\u9898\uff09<\/p>\n<\/blockquote>\n\n\n\n
                  class Base1\n{\npublic:\n    int _b1;\n};\nclass Base2\n{\npublic:\n    int _b2;\n};\nclass Derive : public Base1, public Base2\n{\npublic:\n    int _d;\n};\nint main()\n{\n    Derive d;\n    Base1* p1 = &d;\n    Base2* p2 = &d;\n    Derive* p3 = &d;\n    return 0;\n}<\/code><\/pre>\n\n\n\n
                  A.p1 == p2 == p3
                  B.p1 < p2 < p3
                  C.p1 == p3 != p2
                  D.p1 != p2 != p3<\/p>\n\n\n\n
                  \n
                  10\u3001\u4ee5\u4e0b\u7a0b\u5e8f\u8f93\u51fa\u7ed3\u679c\u662f\u4ec0\u4e48\uff1f<\/p>\n<\/blockquote>\n\n\n\n
                  #include <iostream>\nusing namespace std;\nclass A\n{\npublic:\n    virtual void func(int val = 1)\n    {\n        cout << \"A->\" << val << endl;\n    }\n    virtual void test()\n    {\n        func();\n    }\n};\nclass B : public A\n{\npublic:\n    void func(int val = 0)\n    {\n        cout << \"B->\" << val << endl;\n    }\n};\nint main()\n{\n    B* p = new B;\n    p->test();\n    return 0;\n}<\/code><\/pre>\n\n\n\n
                  A.A->0\u2003B.B->1\u2003C.A->1\u2003D.B->0
                  E.\u7f16\u8bd1\u9519\u8bef\u2003F.\u4ee5\u4e0a\u90fd\u4e0d\u6b63\u786e<\/p>\n\n\n\n
                  \n
                  \u53c2\u8003\u7b54\u6848\uff1a<\/p>\n<\/blockquote>\n\n\n\n
                  \u9898\u53f7<\/th>\u7b54\u6848<\/th>\u9898\u53f7<\/th>\u7b54\u6848<\/th><\/tr><\/thead>
                  1<\/td>A<\/td>6<\/td>D<\/td><\/tr>
                  2<\/td>D<\/td>7<\/td>D<\/td><\/tr>
                  3<\/td>C<\/td>8<\/td>A<\/td><\/tr>
                  4<\/td>A<\/td>9<\/td>C<\/td><\/tr>
                  5<\/td>B<\/td>10<\/td>B<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
                  \u95ee\u7b54\u9898<\/h3>\n\n\n\n
                  \n
                  1\u3001\u4ec0\u4e48\u662f\u591a\u6001\uff1f<\/p>\n<\/blockquote>\n\n\n\n
                  \u591a\u6001\u662f\u6307\u4e0d\u540c\u7ee7\u627f\u5173\u7cfb\u7684\u7c7b\u5bf9\u8c61\uff0c\u53bb\u8c03\u7528\u540c\u4e00\u51fd\u6570\uff0c\u4ea7\u751f\u4e86\u4e0d\u540c\u7684\u884c\u4e3a\u3002\u591a\u6001\u53c8\u5206\u4e3a\u9759\u6001\u7684\u591a\u6001\u548c\u52a8\u6001\u7684\u591a\u6001\u3002<\/p>\n\n\n\n
                  \n
                  2\u3001\u4ec0\u4e48\u662f\u91cd\u8f7d\u3001\u91cd\u5199(\u8986\u76d6)\u3001\u91cd\u5b9a\u4e49(\u9690\u85cf)\uff1f<\/p>\n<\/blockquote>\n\n\n\n
                  \u91cd\u8f7d\u662f\u6307\u4e24\u4e2a\u51fd\u6570\u5728\u540c\u4e00\u4f5c\u7528\u57df\uff0c\u8fd9\u4e24\u4e2a\u51fd\u6570\u7684\u51fd\u6570\u540d\u76f8\u540c\uff0c\u53c2\u6570\u4e0d\u540c\u3002
                  \u91cd\u5199(\u8986\u76d6)\u662f\u6307\u4e24\u4e2a\u51fd\u6570\u5206\u522b\u5728\u57fa\u7c7b\u548c\u6d3e\u751f\u7c7b\u7684\u4f5c\u7528\u57df\uff0c\u8fd9\u4e24\u4e2a\u51fd\u6570\u7684\u51fd\u6570\u540d\u3001\u53c2\u6570\u3001\u8fd4\u56de\u503c\u90fd\u5fc5\u987b\u76f8\u540c(\u534f\u53d8\u4f8b\u5916)\uff0c\u4e14\u8fd9\u4e24\u4e2a\u51fd\u6570\u90fd\u662f\u865a\u51fd\u6570\u3002
                  \u91cd\u5b9a\u4e49(\u9690\u85cf)\u662f\u6307\u4e24\u4e2a\u51fd\u6570\u5206\u522b\u5728\u57fa\u7c7b\u548c\u6d3e\u751f\u7c7b\u7684\u4f5c\u7528\u57df\uff0c\u8fd9\u4e24\u4e2a\u51fd\u6570\u7684\u51fd\u6570\u540d\u76f8\u540c\u3002\u82e5\u4e24\u4e2a\u57fa\u7c7b\u548c\u6d3e\u751f\u7c7b\u7684\u540c\u540d\u51fd\u6570\u4e0d\u6784\u6210\u91cd\u5199\u5c31\u662f\u91cd\u5b9a\u4e49\u3002<\/p>\n\n\n\n
                  \n
                  3\u3001\u591a\u6001\u7684\u5b9e\u73b0\u539f\u7406\uff1f<\/p>\n<\/blockquote>\n\n\n\n
                  \u6784\u6210\u591a\u6001\u7684\u7236\u7c7b\u5bf9\u8c61\u548c\u5b50\u7c7b\u5bf9\u8c61\u7684\u6210\u5458\u5f53\u4e2d\u90fd\u5305\u542b\u4e00\u4e2a\u865a\u8868\u6307\u9488\uff0c\u8fd9\u4e2a\u865a\u8868\u6307\u9488\u6307\u5411\u4e00\u4e2a\u865a\u8868\uff0c\u865a\u8868\u5f53\u4e2d\u5b58\u50a8\u7684\u662f\u8be5\u7c7b\u5bf9\u5e94\u7684\u865a\u51fd\u6570\u5730\u5740\u3002\u56e0\u6b64\uff0c\u5f53\u7236\u7c7b\u6307\u9488\u6307\u5411\u7236\u7c7b\u5bf9\u8c61\u65f6\uff0c\u901a\u8fc7\u7236\u7c7b\u6307\u9488\u627e\u5230\u865a\u8868\u6307\u9488\uff0c\u7136\u540e\u5728\u865a\u8868\u5f53\u4e2d\u627e\u5230\u7684\u5c31\u662f\u7236\u7c7b\u5f53\u4e2d\u5bf9\u5e94\u7684\u865a\u51fd\u6570\uff1b\u5f53\u7236\u7c7b\u6307\u9488\u6307\u5411\u5b50\u7c7b\u5bf9\u8c61\u65f6\uff0c\u901a\u8fc7\u7236\u7c7b\u6307\u9488\u627e\u5230\u865a\u8868\u6307\u9488\uff0c\u7136\u540e\u5728\u865a\u8868\u5f53\u4e2d\u627e\u5230\u7684\u5c31\u662f\u5b50\u7c7b\u5f53\u4e2d\u5bf9\u5e94\u7684\u865a\u51fd\u6570\u3002<\/p>\n\n\n\n
                  \n
                  4\u3001inline\u53ef\u4ee5\u662f\u865a\u51fd\u6570\u5417\uff1f<\/p>\n<\/blockquote>\n\n\n\n
                  \u6211\u4eec\u77e5\u9053\u5185\u8054\u51fd\u6570\u662f\u4f1a\u5728\u8c03\u7528\u7684\u5730\u65b9\u5c55\u5f00\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4\u5185\u8054\u51fd\u6570\u662f\u6ca1\u6709\u5730\u5740\u7684\uff0c\u4f46\u662f\u5185\u8054\u51fd\u6570\u662f\u53ef\u4ee5\u5b9a\u4e49\u6210\u865a\u51fd\u6570\u7684\uff0c\u5f53\u6211\u4eec\u628a\u5185\u8054\u51fd\u6570\u5b9a\u4e49\u865a\u51fd\u6570\u540e\uff0c\u7f16\u8bd1\u5668\u5c31\u5ffd\u7565\u4e86\u8be5\u51fd\u6570\u7684\u5185\u8054\u5c5e\u6027\uff0c\u8fd9\u4e2a\u51fd\u6570\u5c31\u4e0d\u518d\u662f\u5185\u8054\u51fd\u6570\u4e86\uff0c\u56e0\u4e3a\u9700\u8981\u5c06\u865a\u51fd\u6570\u7684\u5730\u5740\u653e\u5230\u865a\u8868\u4e2d\u53bb\u3002<\/p>\n\n\n\n
                  \n
                  5\u3001\u9759\u6001\u6210\u5458\u51fd\u6570\u53ef\u4ee5\u662f\u865a\u51fd\u6570\u5417\uff1f<\/p>\n<\/blockquote>\n\n\n\n
                  \u9759\u6001\u6210\u5458\u51fd\u6570\u4e0d\u80fd\u662f\u865a\u51fd\u6570\uff0c\u56e0\u4e3a\u9759\u6001\u6210\u5458\u51fd\u6570\u6ca1\u6709this\u6307\u9488\uff0c\u4f7f\u7528\u7c7b\u578b::\u6210\u5458\u51fd\u6570<\/code>\u7684\u8c03\u7528\u65b9\u5f0f\u65e0\u6cd5\u8bbf\u95ee\u865a\u8868\uff0c\u6240\u4ee5\u9759\u6001\u6210\u5458\u51fd\u6570\u65e0\u6cd5\u653e\u8fdb\u865a\u8868\u3002<\/p>\n\n\n\n
                  \n
                  6\u3001\u6784\u9020\u51fd\u6570\u53ef\u4ee5\u662f\u865a\u51fd\u6570\u5417\uff1f<\/p>\n<\/blockquote>\n\n\n\n
                  \u6784\u9020\u51fd\u6570\u4e0d\u80fd\u662f\u865a\u51fd\u6570\uff0c\u56e0\u4e3a\u5bf9\u8c61\u4e2d\u7684\u865a\u8868\u6307\u9488\u662f\u5728\u6784\u9020\u51fd\u6570\u521d\u59cb\u5316\u5217\u8868\u9636\u6bb5\u624d\u521d\u59cb\u5316\u7684\uff0c<\/p>\n\n\n\n
                  \n
                  7\u3001\u6790\u6784\u51fd\u6570\u53ef\u4ee5\u662f\u865a\u51fd\u6570\u5417\uff1f\u4ec0\u4e48\u573a\u666f\u4e0b\u6790\u6784\u51fd\u6570\u662f\u865a\u51fd\u6570\uff1f<\/p>\n<\/blockquote>\n\n\n\n
                  \u6790\u6784\u51fd\u6570\u53ef\u4ee5\u662f\u865a\u51fd\u6570\uff0c\u5e76\u4e14\u6700\u540e\u628a\u57fa\u7c7b\u7684\u6790\u6784\u51fd\u6570\u5b9a\u4e49\u6210\u865a\u51fd\u6570\u3002\u82e5\u662f\u6211\u4eec\u5206\u522bnew\u4e00\u4e2a\u7236\u7c7b\u5bf9\u8c61\u548c\u4e00\u4e2a\u5b50\u7c7b\u5bf9\u8c61\uff0c\u5e76\u5747\u7528\u7236\u7c7b\u6307\u9488\u6307\u5411\u5b83\u4eec\uff0c\u5f53\u6211\u4eec\u4f7f\u7528delete\u8c03\u7528\u6790\u6784\u51fd\u6570\u5e76\u91ca\u653e\u5bf9\u8c61\u7a7a\u95f4\u65f6\uff0c\u53ea\u6709\u5f53\u7236\u7c7b\u7684\u6790\u6784\u51fd\u6570\u662f\u865a\u51fd\u6570\u7684\u60c5\u51b5\u4e0b\uff0c\u624d\u80fd\u6b63\u786e\u8c03\u7528\u7236\u7c7b\u548c\u5b50\u7c7b\u7684\u6790\u6784\u51fd\u6570\u5206\u522b\u5bf9\u7236\u7c7b\u548c\u5b50\u7c7b\u5bf9\u8c61\u8fdb\u884c\u6790\u6784\uff0c\u5426\u5219\u5f53\u6211\u4eec\u4f7f\u7528\u7236\u7c7b\u6307\u9488delete\u5bf9\u8c61\u65f6\uff0c\u53ea\u80fd\u8c03\u7528\u5230\u7236\u7c7b\u7684\u6790\u6784\u51fd\u6570\u3002<\/p>\n\n\n\n
                  \n
                  8\u3001\u5bf9\u8c61\u8bbf\u95ee\u666e\u901a\u51fd\u6570\u5feb\u8fd8\u662f\u865a\u51fd\u6570\u66f4\u5feb\uff1f<\/p>\n<\/blockquote>\n\n\n\n
                  \u5bf9\u8c61\u8bbf\u95ee\u666e\u901a\u51fd\u6570\u6bd4\u8bbf\u95ee\u865a\u51fd\u6570\u66f4\u5feb\uff0c\u82e5\u6211\u4eec\u8bbf\u95ee\u7684\u662f\u4e00\u4e2a\u666e\u901a\u51fd\u6570\uff0c\u90a3\u76f4\u63a5\u8bbf\u95ee\u5c31\u884c\u4e86\uff0c\u4f46\u5f53\u6211\u4eec\u8bbf\u95ee\u7684\u662f\u865a\u51fd\u6570\u65f6\uff0c\u6211\u4eec\u9700\u8981\u5148\u627e\u5230\u865a\u8868\u6307\u9488\uff0c\u7136\u540e\u5728\u865a\u8868\u5f53\u4e2d\u627e\u5230\u5bf9\u5e94\u7684\u865a\u51fd\u6570\uff0c\u6700\u540e\u624d\u80fd\u8c03\u7528\u5230\u865a\u51fd\u6570\u3002<\/p>\n\n\n\n
                  \n
                  9\u3001\u865a\u51fd\u6570\u8868\u662f\u5728\u4ec0\u4e48\u9636\u6bb5\u751f\u6210\u7684\uff1f\u5b58\u5728\u54ea\u7684\uff1f<\/p>\n<\/blockquote>\n\n\n\n
                  \u865a\u8868\u662f\u5728\u6784\u9020\u51fd\u6570\u521d\u59cb\u5316\u5217\u8868\u9636\u6bb5\u8fdb\u884c\u521d\u59cb\u5316\u7684\uff0c\u865a\u8868\u4e00\u822c\u60c5\u51b5\u4e0b\u662f\u5b58\u5728\u4ee3\u7801\u6bb5(\u5e38\u91cf\u533a)\u7684\u3002<\/p>\n\n\n\n
                  \n
                  10\u3001C++\u83f1\u5f62\u7ee7\u627f\u7684\u95ee\u9898\uff1f\u865a\u7ee7\u627f\u7684\u539f\u7406\uff1f<\/p>\n<\/blockquote>\n\n\n\n
                  \u83f1\u5f62\u865a\u62df\u7ee7\u627f\u56e0\u4e3a\u5b50\u7c7b\u5bf9\u8c61\u5f53\u4e2d\u4f1a\u6709\u4e24\u4efd\u7236\u7c7b\u7684\u6210\u5458\uff0c\u56e0\u6b64\u4f1a\u5bfc\u81f4\u6570\u636e\u5197\u4f59\u548c\u4e8c\u4e49\u6027\u7684\u95ee\u9898\u3002
                  \u865a\u7ee7\u627f\u5bf9\u4e8e\u76f8\u540c\u7684\u865a\u57fa\u7c7b\u5728\u5bf9\u8c61\u5f53\u4e2d\u53ea\u4f1a\u5b58\u50a8\u4e00\u4efd\uff0c\u82e5\u8981\u8bbf\u95ee\u865a\u57fa\u7c7b\u7684\u6210\u5458\u9700\u8981\u901a\u8fc7\u865a\u57fa\u8868\u83b7\u53d6\u5230\u504f\u79fb\u91cf\uff0c\u8fdb\u800c\u627e\u5230\u5bf9\u5e94\u7684\u865a\u57fa\u7c7b\u6210\u5458\uff0c\u4ece\u800c\u89e3\u51b3\u4e86\u6570\u636e\u5197\u4f59\u548c\u4e8c\u4e49\u6027\u7684\u95ee\u9898\u3002<\/p>\n\n\n\n
                  \n
                  11\u3001\u4ec0\u4e48\u662f\u62bd\u8c61\u7c7b\uff1f\u62bd\u8c61\u7c7b\u7684\u4f5c\u7528\uff1f<\/p>\n<\/blockquote>\n\n\n\n
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