{"id":96,"date":"2026-03-22T17:21:21","date_gmt":"2026-03-22T09:21:21","guid":{"rendered":"https:\/\/codergodv.xyz\/?p=96"},"modified":"2026-03-22T17:21:22","modified_gmt":"2026-03-22T09:21:22","slug":"c11-%e5%8f%af%e5%8f%98%e5%8f%82%e6%95%b0%e6%a8%a1%e6%9d%bf","status":"publish","type":"post","link":"https:\/\/codergodv.xyz\/index.php\/2026\/03\/22\/c11-%e5%8f%af%e5%8f%98%e5%8f%82%e6%95%b0%e6%a8%a1%e6%9d%bf\/","title":{"rendered":"C++11 \u2014\u2014\u2014 \u53ef\u53d8\u53c2\u6570\u6a21\u677f"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u53ef\u53d8\u53c2\u6570\u6a21\u677f\u7684\u6982\u5ff5<\/h2>\n\n\n\n<p>\u53ef\u53d8\u53c2\u6570\u6a21\u677f\u662fC++11\u65b0\u589e\u7684\u6700\u5f3a\u5927\u7684\u7279\u6027\u4e4b\u4e00\uff0c\u5b83\u5bf9\u53c2\u6570\u9ad8\u5ea6\u6cdb\u5316\uff0c\u80fd\u591f\u8ba9\u6211\u4eec\u521b\u5efa\u53ef\u4ee5\u63a5\u53d7\u53ef\u53d8\u53c2\u6570\u7684\u51fd\u6570\u6a21\u677f\u548c\u7c7b\u6a21\u677f\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5728C++11\u4e4b\u524d\uff0c\u7c7b\u6a21\u677f\u548c\u51fd\u6570\u6a21\u677f\u4e2d\u53ea\u80fd\u5305\u542b\u56fa\u5b9a\u6570\u91cf\u7684\u6a21\u677f\u53c2\u6570\uff0c\u53ef\u53d8\u6a21\u677f\u53c2\u6570\u65e0\u7591\u662f\u4e00\u4e2a\u5de8\u5927\u7684\u6539\u8fdb\uff0c\u4f46\u7531\u4e8e\u53ef\u53d8\u53c2\u6570\u6a21\u677f\u6bd4\u8f83\u62bd\u8c61\uff0c\u56e0\u6b64\u4f7f\u7528\u8d77\u6765\u9700\u8981\u4e00\u5b9a\u7684\u6280\u5de7\u3002<\/li>\n\n\n\n<li>\u5728C++11\u4e4b\u524d\u5176\u5b9e\u4e5f\u6709\u53ef\u53d8\u53c2\u6570\u7684\u6982\u5ff5\uff0c\u6bd4\u5982printf\u51fd\u6570\u5c31\u80fd\u591f\u63a5\u6536\u4efb\u610f\u591a\u4e2a\u53c2\u6570\uff0c\u4f46\u8fd9\u662f\u51fd\u6570\u53c2\u6570\u7684\u53ef\u53d8\u53c2\u6570\uff0c\u5e76\u4e0d\u662f\u6a21\u677f\u7684\u53ef\u53d8\u53c2\u6570\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>\u8bf4\u660e\u4e00\u4e0b\uff1a\u672c\u7bc7\u535a\u5ba2\u53ea\u8bb2\u89e3\u51fd\u6570\u6a21\u677f\u7684\u53ef\u53d8\u53c2\u6570\u3002<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u53ef\u53d8\u53c2\u6570\u6a21\u677f\u7684\u5b9a\u4e49\u65b9\u5f0f<\/h2>\n\n\n\n<p>\u51fd\u6570\u7684\u53ef\u53d8\u53c2\u6570\u6a21\u677f\u5b9a\u4e49\u65b9\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>template<br>\u8fd4\u56de\u7c7b\u578b \u51fd\u6570\u540d(Args\u2026 args)<br>{<br>\u2003\u2003\/\/\u51fd\u6570\u4f53<br>}<\/p>\n<\/blockquote>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>template&lt;class ...Args&gt;\nvoid ShowList(Args... args)\n{}<\/code><\/pre>\n\n\n\n<p><strong>\u8bf4\u660e\u4e00\u4e0b\uff1a<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/cdn.codergodv.xyz\/image-20250926210857599.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/cdn.codergodv.xyz\/image-20250926210857599.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image-20250926210857599\"\/><\/div><\/figure>\n\n\n\n<p>\u73b0\u5728\u8c03\u7528ShowList\u51fd\u6570\u65f6\u5c31\u53ef\u4ee5\u4f20\u5165\u4efb\u610f\u591a\u4e2a\u53c2\u6570\u4e86\uff0c\u5e76\u4e14\u8fd9\u4e9b\u53c2\u6570\u53ef\u4ee5\u662f\u4e0d\u540c\u7c7b\u578b\u7684\u3002\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int main()\n{\n    ShowList();\n    ShowList(1);\n    ShowList(1, 'A');\n    ShowList(1, 'A', string(\"hello\"));\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u6211\u4eec\u53ef\u4ee5\u5728\u51fd\u6570\u6a21\u677f\u4e2d\u901a\u8fc7sizeof\u8ba1\u7b97\u53c2\u6570\u5305\u4e2d\u53c2\u6570\u7684\u4e2a\u6570\u3002\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>template&lt;class ...Args&gt;\nvoid ShowList(Args... args)\n{\n    cout &lt;&lt; sizeof...(args) &lt;&lt; endl; \/\/\u83b7\u53d6\u53c2\u6570\u5305\u4e2d\u53c2\u6570\u7684\u4e2a\u6570\n}<\/code><\/pre>\n\n\n\n<p>\u4f46\u662f\u6211\u4eec\u65e0\u6cd5\u76f4\u63a5\u83b7\u53d6\u53c2\u6570\u5305\u4e2d\u7684\u6bcf\u4e2a\u53c2\u6570\uff0c\u53ea\u80fd\u901a\u8fc7\u5c55\u5f00\u53c2\u6570\u5305\u7684\u65b9\u5f0f\u6765\u83b7\u53d6\uff0c\u8fd9\u662f\u4f7f\u7528\u53ef\u53d8\u53c2\u6570\u6a21\u677f\u7684\u4e00\u4e2a\u4e3b\u8981\u7279\u70b9\uff0c\u4e5f\u662f\u6700\u5927\u7684\u96be\u70b9\u3002<\/p>\n\n\n\n<p>\u7279\u522b\u6ce8\u610f\uff0c\u8bed\u6cd5\u5e76\u4e0d\u652f\u6301\u4f7f\u7528<code>args[i]<\/code>\u7684\u65b9\u5f0f\u6765\u83b7\u53d6\u53c2\u6570\u5305\u4e2d\u7684\u53c2\u6570\u3002\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>template&lt;class ...Args&gt;\nvoid ShowList(Args... args)\n{\n    \/\/\u9519\u8bef\u793a\u4f8b\uff1a\n    for (int i = 0; i &lt; sizeof...(args); i++)\n    {\n        cout &lt;&lt; args&#91;i] &lt;&lt; \" \"; \/\/\u6253\u5370\u53c2\u6570\u5305\u4e2d\u7684\u6bcf\u4e2a\u53c2\u6570\n    }\n    cout &lt;&lt; endl;\n}<\/code><\/pre>\n\n\n\n<p>\u56e0\u6b64\u8981\u83b7\u53d6\u53c2\u6570\u5305\u4e2d\u7684\u5404\u4e2a\u53c2\u6570\uff0c\u53ea\u80fd\u901a\u8fc7\u5c55\u5f00\u53c2\u6570\u5305\u7684\u65b9\u5f0f\u6765\u83b7\u53d6\uff0c\u4e00\u822c\u6211\u4eec\u4f1a\u901a\u8fc7\u9012\u5f52\u6216<a href=\"https:\/\/so.csdn.net\/so\/search?q=\u9017\u53f7\u8868\u8fbe\u5f0f&amp;spm=1001.2101.3001.7020\">\u9017\u53f7\u8868\u8fbe\u5f0f<\/a>\u6765\u5c55\u5f00\u53c2\u6570\u5305\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u53c2\u6570\u5305\u7684\u5c55\u5f00\u65b9\u5f0f<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u9012\u5f52\u5c55\u5f00\u53c2\u6570\u5305<\/h3>\n\n\n\n<p>\u9012\u5f52\u5c55\u5f00\u53c2\u6570\u5305\u7684\u65b9\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7ed9\u51fd\u6570\u6a21\u677f\u589e\u52a0\u4e00\u4e2a\u6a21\u677f\u53c2\u6570\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u4ece\u63a5\u6536\u5230\u7684\u53c2\u6570\u5305\u4e2d\u5206\u79bb\u51fa\u4e00\u4e2a\u53c2\u6570\u51fa\u6765\u3002<\/li>\n\n\n\n<li>\u5728\u51fd\u6570\u6a21\u677f\u4e2d\u9012\u5f52\u8c03\u7528\u8be5\u51fd\u6570\u6a21\u677f\uff0c\u8c03\u7528\u65f6\u4f20\u5165\u5269\u4e0b\u7684\u53c2\u6570\u5305\u3002<\/li>\n\n\n\n<li>\u5982\u6b64\u9012\u5f52\u4e0b\u53bb\uff0c\u6bcf\u6b21\u5206\u79bb\u51fa\u53c2\u6570\u5305\u4e2d\u7684\u4e00\u4e2a\u53c2\u6570\uff0c\u76f4\u5230\u53c2\u6570\u5305\u4e2d\u7684\u6240\u6709\u53c2\u6570\u90fd\u88ab\u53d6\u51fa\u6765\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u6bd4\u5982\u6211\u4eec\u8981\u6253\u5370\u8c03\u7528\u51fd\u6570\u65f6\u4f20\u5165\u7684\u5404\u4e2a\u53c2\u6570\uff0c\u90a3\u4e48\u51fd\u6570\u6a21\u677f\u53ef\u4ee5\u8fd9\u6837\u7f16\u5199\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u5c55\u5f00\u51fd\u6570\ntemplate&lt;class T, class ...Args&gt;\nvoid ShowList(T value, Args... args)\n{\n    cout &lt;&lt; value &lt;&lt; \" \"; \/\/\u6253\u5370\u5206\u79bb\u51fa\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\n    ShowList(args...);    \/\/\u9012\u5f52\u8c03\u7528\uff0c\u5c06\u53c2\u6570\u5305\u7ee7\u7eed\u5411\u4e0b\u4f20\n}<\/code><\/pre>\n\n\n\n<p>\u8fd9\u65f6\u6211\u4eec\u9762\u4e34\u7684\u95ee\u9898\u5c31\u662f\uff0c\u5982\u4f55\u7ec8\u6b62\u51fd\u6570\u7684\u9012\u5f52\u8c03\u7528\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u7f16\u5199\u65e0\u53c2\u7684\u9012\u5f52\u7ec8\u6b62\u51fd\u6570<\/p>\n<\/blockquote>\n\n\n\n<p>\u6211\u4eec\u53ef\u4ee5\u5728\u521a\u624d\u7684\u57fa\u7840\u4e0a\uff0c\u518d\u7f16\u5199\u4e00\u4e2a\u65e0\u53c2\u7684\u9012\u5f52\u7ec8\u6b62\u51fd\u6570\uff0c\u8be5\u51fd\u6570\u7684\u51fd\u6570\u540d\u4e0e\u5c55\u5f00\u51fd\u6570\u7684\u51fd\u6570\u540d\u76f8\u540c\u3002\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u9012\u5f52\u7ec8\u6b62\u51fd\u6570\nvoid ShowList()\n{\n    cout &lt;&lt; endl;\n}\n\/\/\u5c55\u5f00\u51fd\u6570\ntemplate&lt;class T, class ...Args&gt;\nvoid ShowList(T value, Args... args)\n{\n    cout &lt;&lt; value &lt;&lt; \" \"; \/\/\u6253\u5370\u5206\u79bb\u51fa\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\n    ShowList(args...);    \/\/\u9012\u5f52\u8c03\u7528\uff0c\u5c06\u53c2\u6570\u5305\u7ee7\u7eed\u5411\u4e0b\u4f20\n}<\/code><\/pre>\n\n\n\n<p>\u8fd9\u6837\u4e00\u6765\uff0c\u5f53\u9012\u5f52\u8c03\u7528ShowList\u51fd\u6570\u6a21\u677f\u65f6\uff0c\u5982\u679c\u4f20\u5165\u7684\u53c2\u6570\u5305\u4e2d\u53c2\u6570\u7684\u4e2a\u6570\u4e3a0\uff0c\u90a3\u4e48\u5c31\u4f1a\u5339\u914d\u5230\u8fd9\u4e2a\u65e0\u53c2\u7684\u9012\u5f52\u7ec8\u6b62\u51fd\u6570\uff0c\u8fd9\u6837\u5c31\u7ed3\u675f\u4e86\u9012\u5f52\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f46\u5982\u679c\u5916\u90e8\u8c03\u7528ShowList\u51fd\u6570\u65f6\u5c31\u6ca1\u6709\u4f20\u5165\u53c2\u6570\uff0c\u90a3\u4e48\u5c31\u4f1a\u76f4\u63a5\u5339\u914d\u5230\u65e0\u53c2\u7684\u9012\u5f52\u7ec8\u6b62\u51fd\u6570\u3002<\/li>\n\n\n\n<li>\u800c\u6211\u4eec\u672c\u610f\u662f\u60f3\u8ba9\u5916\u90e8\u8c03\u7528ShowList\u51fd\u6570\u65f6\u5339\u914d\u7684\u90fd\u662f\u51fd\u6570\u6a21\u677f\uff0c\u5e76\u4e0d\u662f\u8ba9\u5916\u90e8\u8c03\u7528\u65f6\u76f4\u63a5\u5339\u914d\u5230\u8fd9\u4e2a\u9012\u5f52\u7ec8\u6b62\u51fd\u6570\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u9274\u4e8e\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u5c55\u5f00\u51fd\u6570\u548c\u9012\u5f52\u8c03\u7528\u51fd\u6570\u7684\u51fd\u6570\u540d\u6539\u4e3aShowListArg\uff0c\u7136\u540e\u91cd\u65b0\u7f16\u5199\u4e00\u4e2aShowList\u51fd\u6570\u6a21\u677f\uff0c\u8be5\u51fd\u6570\u6a21\u677f\u7684\u51fd\u6570\u4f53\u4e2d\u8981\u505a\u7684\u5c31\u662f\u8c03\u7528ShowListArg\u51fd\u6570\u5c55\u5f00\u53c2\u6570\u5305\u3002\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u9012\u5f52\u7ec8\u6b62\u51fd\u6570\nvoid ShowListArg()\n{\n    cout &lt;&lt; endl;\n}\n\/\/\u5c55\u5f00\u51fd\u6570\ntemplate&lt;class T, class ...Args&gt;\nvoid ShowListArg(T value, Args... args)\n{\n    cout &lt;&lt; value &lt;&lt; \" \"; \/\/\u6253\u5370\u4f20\u5165\u7684\u82e5\u5e72\u53c2\u6570\u4e2d\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\n    ShowListArg(args...); \/\/\u5c06\u5269\u4e0b\u53c2\u6570\u7ee7\u7eed\u5411\u4e0b\u4f20\n}\n\/\/\u4f9b\u5916\u90e8\u8c03\u7528\u7684\u51fd\u6570\ntemplate&lt;class ...Args&gt;\nvoid ShowList(Args... args)\n{\n    ShowListArg(args...);\n}<\/code><\/pre>\n\n\n\n<p>\u8fd9\u65f6\u65e0\u8bba\u5916\u90e8\u8c03\u7528\u65f6\u4f20\u5165\u591a\u5c11\u4e2a\u53c2\u6570\uff0c\u6700\u7ec8\u5339\u914d\u5230\u7684\u90fd\u662f\u540c\u4e00\u4e2a\u51fd\u6570\u4e86\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u7f16\u5199\u5e26\u53c2\u7684\u9012\u5f52\u7ec8\u6b62\u51fd\u6570<\/p>\n<\/blockquote>\n\n\n\n<p>\u9664\u4e86\u7f16\u5199\u65e0\u53c2\u7684\u9012\u5f52\u7ec8\u6b62\u51fd\u6570\uff0c\u4e5f\u53ef\u4ee5\u7f16\u5199\u5e26\u53c2\u6570\u7684\u9012\u5f52\u7ec8\u6b62\u51fd\u6570\u6765\u7ec8\u6b62\u9012\u5f52\uff0c\u6bd4\u5982\u8fd9\u91cc\u7f16\u5199\u5e26\u4e00\u4e2a\u53c2\u6570\u7684\u9012\u5f52\u7ec8\u6b62\u51fd\u6570\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u9012\u5f52\u7ec8\u6b62\u51fd\u6570\ntemplate&lt;class T&gt;\nvoid ShowListArg(const T&amp; t)\n{\n    cout &lt;&lt; t &lt;&lt; endl;\n}\n\/\/\u5c55\u5f00\u51fd\u6570\ntemplate&lt;class T, class ...Args&gt;\nvoid ShowListArg(T value, Args... args)\n{\n    cout &lt;&lt; value &lt;&lt; \" \"; \/\/\u6253\u5370\u4f20\u5165\u7684\u82e5\u5e72\u53c2\u6570\u4e2d\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\n    ShowList(args...);    \/\/\u5c06\u5269\u4e0b\u53c2\u6570\u7ee7\u7eed\u5411\u4e0b\u4f20\n}\n\/\/\u4f9b\u5916\u90e8\u8c03\u7528\u7684\u51fd\u6570\ntemplate&lt;class ...Args&gt;\nvoid ShowList(Args... args)\n{\n    ShowListArg(args...);\n}<\/code><\/pre>\n\n\n\n<p>\u8fd9\u6837\u4e00\u6765\uff0c\u5728\u9012\u5f52\u8c03\u7528\u8fc7\u7a0b\u4e2d\uff0c\u5982\u679c\u4f20\u5165\u7684\u53c2\u6570\u5305\u4e2d\u53c2\u6570\u7684\u4e2a\u6570\u4e3a1\uff0c\u90a3\u4e48\u5c31\u4f1a\u5339\u914d\u5230\u8fd9\u4e2a\u9012\u5f52\u7ec8\u6b62\u51fd\u6570\uff0c\u8fd9\u6837\u4e5f\u5c31\u7ed3\u675f\u4e86\u9012\u5f52\u3002\u4f46\u662f\u9700\u8981\u6ce8\u610f\uff0c\u8fd9\u91cc\u7684\u9012\u5f52\u8c03\u7528\u51fd\u6570\u9700\u8981\u5199\u6210\u51fd\u6570\u6a21\u677f\uff0c\u56e0\u4e3a\u6211\u4eec\u5e76\u4e0d\u77e5\u9053\u6700\u540e\u4e00\u4e2a\u53c2\u6570\u662f\u4ec0\u4e48\u7c7b\u578b\u7684\u3002<\/p>\n\n\n\n<p>\u4f46\u8be5\u65b9\u6cd5\u6709\u4e00\u4e2a\u5f0a\u7aef\u5c31\u662f\uff0c\u6211\u4eec\u5728\u8c03\u7528ShowList\u51fd\u6570\u65f6\u5fc5\u987b\u81f3\u5c11\u4f20\u5165\u4e00\u4e2a\u53c2\u6570\uff0c\u5426\u5219\u5c31\u4f1a\u62a5\u9519\u3002\u56e0\u4e3a\u6b64\u65f6\u65e0\u8bba\u662f\u8c03\u7528\u9012\u5f52\u7ec8\u6b62\u51fd\u6570\u8fd8\u662f\u5c55\u5f00\u51fd\u6570\uff0c\u90fd\u9700\u8981\u81f3\u5c11\u4f20\u5165\u4e00\u4e2a\u53c2\u6570\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u5224\u65ad\u53c2\u6570\u5305\u4e2d\u53c2\u6570\u7684\u4e2a\u6570\uff08\u4e0d\u53ef\u884c\uff01\uff09<\/p>\n<\/blockquote>\n\n\n\n<p>\u65e2\u7136\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7sizeof\u8ba1\u7b97\u51fa\u53c2\u6570\u5305\u4e2d\u53c2\u6570\u7684\u4e2a\u6570\uff0c\u90a3\u6211\u4eec\u80fd\u4e0d\u80fd\u5728ShowList\u51fd\u6570\u4e2d\u8bbe\u7f6e\u4e00\u4e2a\u5224\u65ad\uff0c\u5f53\u53c2\u6570\u5305\u4e2d\u53c2\u6570\u4e2a\u6570\u4e3a0\u65f6\u5c31\u7ec8\u6b62\u9012\u5f52\u5462\uff1f\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u9519\u8bef\u793a\u4f8b\ntemplate&lt;class T, class ...Args&gt;\nvoid ShowList(T value, Args... args)\n{\n    cout &lt;&lt; value &lt;&lt; \" \"; \/\/\u6253\u5370\u4f20\u5165\u7684\u82e5\u5e72\u53c2\u6570\u4e2d\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\n    if (sizeof...(args) == 0)\n    {\n        return;\n    }\n    ShowList(args...);    \/\/\u5c06\u5269\u4e0b\u53c2\u6570\u7ee7\u7eed\u5411\u4e0b\u4f20\n}<\/code><\/pre>\n\n\n\n<p>\u8fd9\u79cd\u65b9\u5f0f\u662f\u4e0d\u53ef\u884c\u7684\uff0c\u539f\u56e0\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u51fd\u6570\u6a21\u677f\u5e76\u4e0d\u80fd\u8c03\u7528\uff0c\u51fd\u6570\u6a21\u677f\u9700\u8981\u5728\u7f16\u8bd1\u65f6\u6839\u636e\u4f20\u5165\u7684\u5b9e\u53c2\u7c7b\u578b\u8fdb\u884c\u63a8\u6f14\uff0c\u751f\u6210\u5bf9\u5e94\u7684\u51fd\u6570\uff0c\u8fd9\u4e2a\u751f\u6210\u7684\u51fd\u6570\u624d\u80fd\u591f\u88ab\u8c03\u7528\u3002<\/li>\n\n\n\n<li>\u800c\u8fd9\u4e2a\u63a8\u6f14\u8fc7\u7a0b\u662f\u5728\u7f16\u8bd1\u65f6\u8fdb\u884c\u7684\uff0c\u5f53\u63a8\u6f14\u5230\u53c2\u6570\u5305args\u4e2d\u53c2\u6570\u4e2a\u6570\u4e3a0\u65f6\uff0c\u8fd8\u9700\u8981\u5c06\u5f53\u524d\u51fd\u6570\u63a8\u6f14\u5b8c\u6bd5\uff0c\u8fd9\u65f6\u5c31\u4f1a\u7ee7\u7eed\u63a8\u6f14\u4f20\u51650\u4e2a\u53c2\u6570\u65f6\u7684ShowList\u51fd\u6570\uff0c\u6b64\u65f6\u5c31\u4f1a\u4ea7\u751f\u62a5\u9519\uff0c\u56e0\u4e3aShowList\u51fd\u6570\u8981\u6c42\u81f3\u5c11\u4f20\u5165\u4e00\u4e2a\u53c2\u6570\u3002<\/li>\n\n\n\n<li>\u8fd9\u91cc\u7f16\u5199\u7684if\u5224\u65ad\u662f\u5728\u4ee3\u7801\u7f16\u8bd1\u7ed3\u675f\u540e\uff0c\u8fd0\u884c\u4ee3\u7801\u65f6\u624d\u4f1a\u6240\u8d70\u7684\u903b\u8f91\uff0c\u4e5f\u5c31\u662f\u8fd0\u884c\u65f6\u903b\u8f91\uff0c\u800c\u51fd\u6570\u6a21\u677f\u7684\u63a8\u6f14\u662f\u4e00\u4e2a\u7f16\u8bd1\u65f6\u903b\u8f91\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u9017\u53f7\u8868\u8fbe\u5f0f\u5c55\u5f00\u53c2\u6570\u5305<\/h3>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u901a\u8fc7\u5217\u8868\u83b7\u53d6\u53c2\u6570\u5305\u4e2d\u7684\u53c2\u6570<\/p>\n<\/blockquote>\n\n\n\n<p>\u6570\u7ec4\u53ef\u4ee5\u901a\u8fc7\u5217\u8868\u8fdb\u884c\u521d\u59cb\u5316\uff0c\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int a&#91;] = {1,2,3,4}<\/code><\/pre>\n\n\n\n<p>\u9664\u6b64\u4e4b\u5916\uff0c\u5982\u679c\u53c2\u6570\u5305\u4e2d\u5404\u4e2a\u53c2\u6570\u7684\u7c7b\u578b\u90fd\u662f\u6574\u578b\uff0c\u90a3\u4e48\u4e5f\u53ef\u4ee5\u628a\u8fd9\u4e2a\u53c2\u6570\u5305\u653e\u5230\u5217\u8868\u5f53\u4e2d\u521d\u59cb\u5316\u8fd9\u4e2a\u6574\u578b\u6570\u7ec4\uff0c\u6b64\u65f6\u53c2\u6570\u5305\u4e2d\u53c2\u6570\u5c31\u653e\u5230\u6570\u7ec4\u4e2d\u4e86\u3002\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u5c55\u5f00\u51fd\u6570\ntemplate&lt;class ...Args&gt;\nvoid ShowList(Args... args)\n{\n    int arr&#91;] = { args... }; \/\/\u5217\u8868\u521d\u59cb\u5316\n    \/\/\u6253\u5370\u53c2\u6570\u5305\u4e2d\u7684\u5404\u4e2a\u53c2\u6570\n    for (auto e : arr)\n    {\n        cout &lt;&lt; e &lt;&lt; \" \";\n    }\n    cout &lt;&lt; endl;\n}<\/code><\/pre>\n\n\n\n<p>\u8fd9\u65f6\u8c03\u7528ShowList\u51fd\u6570\u65f6\u5c31\u53ef\u4ee5\u4f20\u5165\u591a\u4e2a\u6574\u578b\u53c2\u6570\u4e86\u3002\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int main()\n{\n    ShowList(1);\n    ShowList(1, 2);\n    ShowList(1, 2, 3);\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u4f46C++\u5e76\u4e0d\u50cfPython\u8fd9\u6837\u7684\u8bed\u8a00\uff0cC++\u89c4\u5b9a\u4e00\u4e2a\u5bb9\u5668\u4e2d\u5b58\u50a8\u7684\u6570\u636e\u7c7b\u578b\u5fc5\u987b\u662f\u76f8\u540c\u7684\uff0c\u56e0\u6b64\u5982\u679c\u8fd9\u6837\u5199\u7684\u8bdd\uff0c\u90a3\u4e48\u8c03\u7528ShowList\u51fd\u6570\u65f6\u4f20\u5165\u7684\u53c2\u6570\u53ea\u80fd\u662f\u6574\u578b\u7684\uff0c\u5e76\u4e14\u8fd8\u4e0d\u80fd\u4f20\u51650\u4e2a\u53c2\u6570\uff0c\u56e0\u4e3a\u6570\u7ec4\u7684\u5927\u5c0f\u4e0d\u80fd\u4e3a0\uff0c\u56e0\u6b64\u6211\u4eec\u8fd8\u9700\u8981\u5728\u6b64\u57fa\u7840\u4e0a\u501f\u52a9\u9017\u53f7\u8868\u8fbe\u5f0f\u6765\u5c55\u5f00\u53c2\u6570\u5305\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u901a\u8fc7\u9017\u53f7\u8868\u8fbe\u5f0f\u5c55\u5f00\u53c2\u6570\u5305<\/p>\n<\/blockquote>\n\n\n\n<p>\u867d\u7136\u6211\u4eec\u4e0d\u80fd\u7528\u4e0d\u540c\u7c7b\u578b\u7684\u53c2\u6570\u53bb\u521d\u59cb\u5316\u4e00\u4e2a\u6574\u578b\u6570\u7ec4\uff0c\u4f46\u6211\u4eec\u53ef\u4ee5\u501f\u52a9\u9017\u53f7\u8868\u8fbe\u5f0f\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9017\u53f7\u8868\u8fbe\u5f0f\u4f1a\u4ece\u5de6\u5230\u53f3\u4f9d\u6b21\u8ba1\u7b97\u5404\u4e2a\u8868\u8fbe\u5f0f\uff0c\u5e76\u4e14\u5c06\u6700\u540e\u4e00\u4e2a\u8868\u8fbe\u5f0f\u7684\u503c\u4f5c\u4e3a\u8fd4\u56de\u503c\u8fdb\u884c\u8fd4\u56de\u3002<\/li>\n\n\n\n<li>\u5c06\u9017\u53f7\u8868\u8fbe\u5f0f\u7684\u6700\u540e\u4e00\u4e2a\u8868\u8fbe\u5f0f\u8bbe\u7f6e\u4e3a\u4e00\u4e2a\u6574\u578b\u503c\uff0c\u786e\u4fdd\u9017\u53f7\u8868\u8fbe\u5f0f\u8fd4\u56de\u7684\u662f\u4e00\u4e2a\u6574\u578b\u503c\u3002<\/li>\n\n\n\n<li>\u5c06\u5904\u7406\u53c2\u6570\u5305\u4e2d\u53c2\u6570\u7684\u52a8\u4f5c\u5c01\u88c5\u6210\u4e00\u4e2a\u51fd\u6570\uff0c\u5c06\u8be5\u51fd\u6570\u7684\u8c03\u7528\u4f5c\u4e3a\u9017\u53f7\u8868\u8fbe\u5f0f\u7684\u7b2c\u4e00\u4e2a\u8868\u8fbe\u5f0f\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u6837\u4e00\u6765\uff0c\u5728\u6267\u884c\u9017\u53f7\u8868\u8fbe\u5f0f\u65f6\u5c31\u4f1a\u5148\u8c03\u7528\u5904\u7406\u51fd\u6570\u5904\u7406\u5bf9\u5e94\u7684\u53c2\u6570\uff0c\u7136\u540e\u518d\u5c06\u9017\u53f7\u8868\u8fbe\u5f0f\u4e2d\u7684\u6700\u540e\u4e00\u4e2a\u6574\u578b\u503c\u4f5c\u4e3a\u8fd4\u56de\u503c\u6765\u521d\u59cb\u5316\u6574\u578b\u6570\u7ec4\u3002\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u5904\u7406\u53c2\u6570\u5305\u4e2d\u7684\u6bcf\u4e2a\u53c2\u6570\ntemplate&lt;class T&gt;\nvoid PrintArg(const T&amp; t)\n{\n    cout &lt;&lt; t &lt;&lt; \" \";\n}\n\/\/\u5c55\u5f00\u51fd\u6570\ntemplate&lt;class ...Args&gt;\nvoid ShowList(Args... args)\n{\n    int arr&#91;] = { (PrintArg(args), 0)... }; \/\/\u5217\u8868\u521d\u59cb\u5316+\u9017\u53f7\u8868\u8fbe\u5f0f\n    cout &lt;&lt; endl;\n}<\/code><\/pre>\n\n\n\n<p><strong>\u8bf4\u660e\u4e00\u4e0b\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6211\u4eec\u8fd9\u91cc\u8981\u505a\u7684\u5c31\u662f\u6253\u5370\u53c2\u6570\u5305\u4e2d\u7684\u5404\u4e2a\u53c2\u6570\uff0c\u56e0\u6b64\u5904\u7406\u51fd\u6570\u5f53\u4e2d\u8981\u505a\u7684\u5c31\u662f\u5c06\u4f20\u5165\u7684\u53c2\u6570\u8fdb\u884c\u6253\u5370\u5373\u53ef\u3002<\/li>\n\n\n\n<li>\u53ef\u53d8\u53c2\u6570\u7684\u7701\u7565\u53f7\u9700\u8981\u52a0\u5728\u9017\u53f7\u8868\u8fbe\u5f0f\u5916\u9762\uff0c\u8868\u793a\u9700\u8981\u5c06\u9017\u53f7\u8868\u8fbe\u5f0f\u5c55\u5f00\uff0c\u5982\u679c\u5c06\u7701\u7565\u53f7\u52a0\u5728args\u7684\u540e\u9762\uff0c\u90a3\u4e48\u53c2\u6570\u5305\u5c06\u4f1a\u88ab\u5c55\u5f00\u540e\u5168\u90e8\u4f20\u5165PrintArg\u51fd\u6570\uff0c\u4ee3\u7801\u4e2d\u7684<code>{(PrintArg(args), 0)...}<\/code>\u5c06\u4f1a\u5c55\u5f00\u6210<code>{(PrintArg(arg1), 0), (PrintArg(arg2), 0), (PrintArg(arg3), 0), etc...}<\/code>\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u65f6\u8c03\u7528ShowList\u51fd\u6570\u65f6\u5c31\u53ef\u4ee5\u4f20\u5165\u591a\u4e2a\u4e0d\u540c\u7c7b\u578b\u7684\u53c2\u6570\u4e86\uff0c\u4f46\u8c03\u7528\u65f6\u4ecd\u7136\u4e0d\u80fd\u4f20\u51650\u4e2a\u53c2\u6570\uff0c\u56e0\u4e3a\u6570\u7ec4\u7684\u5927\u5c0f\u4e0d\u80fd\u4e3a0\uff0c\u5982\u679c\u60f3\u8981\u652f\u6301\u4f20\u51650\u4e2a\u53c2\u6570\uff0c\u4e5f\u53ef\u4ee5\u5199\u4e00\u4e2a\u65e0\u53c2\u7684ShowList\u51fd\u6570\u3002\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u652f\u6301\u65e0\u53c2\u8c03\u7528\nvoid ShowList()\n{\n    cout &lt;&lt; endl;\n}\n\/\/\u5904\u7406\u51fd\u6570\ntemplate&lt;class T&gt;\nvoid PrintArg(const T&amp; t)\n{\n    cout &lt;&lt; t &lt;&lt; \" \";\n}\n\/\/\u5c55\u5f00\u51fd\u6570\ntemplate&lt;class ...Args&gt;\nvoid ShowList(Args... args)\n{\n    int arr&#91;] = { (PrintArg(args), 0)... }; \/\/\u5217\u8868\u521d\u59cb\u5316+\u9017\u53f7\u8868\u8fbe\u5f0f\n    cout &lt;&lt; endl;\n}<\/code><\/pre>\n\n\n\n<p>\u5b9e\u9645\u4e0a\u6211\u4eec\u4e5f\u53ef\u4ee5\u4e0d\u7528\u9017\u53f7\u8868\u8fbe\u5f0f\uff0c\u56e0\u4e3a\u8fd9\u91cc\u7684\u95ee\u9898\u5c31\u662f\u521d\u59cb\u5316\u6574\u578b\u6570\u7ec4\u65f6\u5fc5\u987b\u7528\u6574\u6570\uff0c\u90a3\u6211\u4eec\u53ef\u4ee5\u5c06\u5904\u7406\u51fd\u6570\u7684\u8fd4\u56de\u503c\u8bbe\u7f6e\u4e3a\u6574\u578b\uff0c\u7136\u540e\u7528\u8fd9\u4e2a\u8fd4\u56de\u503c\u53bb\u521d\u59cb\u5316\u6574\u578b\u6570\u7ec4\u4e5f\u662f\u53ef\u4ee5\u7684\u3002\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u652f\u6301\u65e0\u53c2\u8c03\u7528\nvoid ShowList()\n{\n    cout &lt;&lt; endl;\n}\n\/\/\u5904\u7406\u51fd\u6570\ntemplate&lt;class T&gt;\nint PrintArg(const T&amp; t)\n{\n    cout &lt;&lt; t &lt;&lt; \" \";\n    return 0;\n}\n\/\/\u5c55\u5f00\u51fd\u6570\ntemplate&lt;class ...Args&gt;\nvoid ShowList(Args... args)\n{\n    int arr&#91;] = { PrintArg(args)... }; \/\/\u5217\u8868\u521d\u59cb\u5316\n    cout &lt;&lt; endl;\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><a href=\"https:\/\/so.csdn.net\/so\/search?q=STL\u5bb9\u5668&amp;spm=1001.2101.3001.7020\">STL\u5bb9\u5668<\/a>\u4e2d\u7684emplace\u76f8\u5173\u63a5\u53e3\u51fd\u6570<\/h2>\n\n\n\n<p>emplace\u7248\u672c\u7684\u63d2\u5165\u63a5\u53e3<\/p>\n\n\n\n<p>C++11\u6807\u51c6\u7ed9STL\u4e2d\u7684\u5bb9\u5668\u589e\u52a0emplace\u7248\u672c\u7684\u63d2\u5165\u63a5\u53e3\uff0c\u6bd4\u5982list\u5bb9\u5668\u7684push_front\u3001push_back\u548cinsert\u51fd\u6570\uff0c\u90fd\u589e\u52a0\u4e86\u5bf9\u5e94\u7684emplace_front\u3001emplace_back\u548cemplace\u51fd\u6570\u3002\u5982\u4e0b\uff1a<img decoding=\"async\" src=\"https:\/\/cdn.codergodv.xyz\/4af1fbd9505d04e0d6c0dbbd3432d925.png\" alt=\"---\"><\/p>\n\n\n\n<p>\u8fd9\u4e9bemplace\u7248\u672c\u7684\u63d2\u5165\u63a5\u53e3\u652f\u6301\u6a21\u677f\u7684\u53ef\u53d8\u53c2\u6570\uff0c\u6bd4\u5982list\u5bb9\u5668\u7684emplace_back\u51fd\u6570\u7684\u58f0\u660e\u5982\u4e0b\uff1a<img decoding=\"async\" src=\"https:\/\/cdn.codergodv.xyz\/686d2bbac640823130a185f35b21e65c.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"><\/p>\n\n\n\n<p><strong>\u6ce8\u610f\uff1a<\/strong> emplace\u7cfb\u5217\u63a5\u53e3\u7684\u53ef\u53d8\u6a21\u677f\u53c2\u6570\u7c7b\u578b\u90fd\u5e26\u6709\u201c&amp;&amp;\u201d\uff0c\u8fd9\u4e2a\u8868\u793a\u7684\u662f\u4e07\u80fd\u5f15\u7528\uff0c\u800c\u4e0d\u662f\u53f3\u503c\u5f15\u7528\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>emplace\u7cfb\u5217\u63a5\u53e3\u7684\u4f7f\u7528\u65b9\u5f0f<\/p>\n<\/blockquote>\n\n\n\n<p>emplace\u7cfb\u5217\u63a5\u53e3\u7684\u4f7f\u7528\u65b9\u5f0f\u4e0e\u5bb9\u5668\u539f\u6709\u7684\u63d2\u5165\u63a5\u53e3\u7684\u4f7f\u7528\u65b9\u5f0f\u7c7b\u4f3c\uff0c\u4f46\u53c8\u6709\u4e00\u4e9b\u4e0d\u540c\u4e4b\u5904\u3002<\/p>\n\n\n\n<p>\u4ee5list\u5bb9\u5668\u7684emplace_back\u548cpush_back\u4e3a\u4f8b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8c03\u7528push_back\u51fd\u6570\u63d2\u5165\u5143\u7d20\u65f6\uff0c\u53ef\u4ee5\u4f20\u5165\u5de6\u503c\u5bf9\u8c61\u6216\u8005\u53f3\u503c\u5bf9\u8c61\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528\u5217\u8868\u8fdb\u884c\u521d\u59cb\u5316\u3002<\/li>\n\n\n\n<li>\u8c03\u7528emplace_back\u51fd\u6570\u63d2\u5165\u5143\u7d20\u65f6\uff0c\u4e5f\u53ef\u4ee5\u4f20\u5165\u5de6\u503c\u5bf9\u8c61\u6216\u8005\u53f3\u503c\u5bf9\u8c61\uff0c\u4f46\u4e0d\u53ef\u4ee5\u4f7f\u7528\u5217\u8868\u8fdb\u884c\u521d\u59cb\u5316\u3002<\/li>\n\n\n\n<li>\u9664\u6b64\u4e4b\u5916\uff0cemplace\u7cfb\u5217\u63a5\u53e3\u6700\u5927\u7684\u7279\u70b9\u5c31\u662f\uff0c\u63d2\u5165\u5143\u7d20\u65f6\u53ef\u4ee5\u4f20\u5165\u7528\u4e8e\u6784\u9020\u5143\u7d20\u7684\u53c2\u6570\u5305\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int main()\n{\n    list&lt;pair&lt;int, string&gt;&gt; mylist;\n    pair&lt;int, string&gt; kv(10, \"111\");\n    mylist.push_back(kv);                              \/\/\u4f20\u5de6\u503c\n    mylist.push_back(pair&lt;int, string&gt;(20, \"222\"));    \/\/\u4f20\u53f3\u503c\n    mylist.push_back({ 30, \"333\" });                   \/\/\u5217\u8868\u521d\u59cb\u5316\n\n    mylist.emplace_back(kv);                           \/\/\u4f20\u5de6\u503c\n    mylist.emplace_back(pair&lt;int, string&gt;(40, \"444\")); \/\/\u4f20\u53f3\u503c\n    mylist.emplace_back(50, \"555\");                    \/\/\u4f20\u53c2\u6570\u5305\n    return 0;\n}<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>emplace\u7cfb\u5217\u63a5\u53e3\u7684\u5de5\u4f5c\u6d41\u7a0b<\/p>\n<\/blockquote>\n\n\n\n<p>emplace\u7cfb\u5217\u63a5\u53e3\u7684\u5de5\u4f5c\u6d41\u7a0b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5148\u901a\u8fc7\u7a7a\u95f4\u914d\u7f6e\u5668\u4e3a\u65b0\u7ed3\u70b9\u83b7\u53d6\u4e00\u5757\u5185\u5b58\u7a7a\u95f4\uff0c\u6ce8\u610f\u8fd9\u91cc\u53ea\u4f1a\u5f00\u8f9f\u7a7a\u95f4\uff0c\u4e0d\u4f1a\u81ea\u52a8\u8c03\u7528\u6784\u9020\u51fd\u6570\u5bf9\u8fd9\u5757\u7a7a\u95f4\u8fdb\u884c\u521d\u59cb\u5316\u3002<\/li>\n\n\n\n<li>\u7136\u540e\u8c03\u7528allocator_traits::construct\u51fd\u6570\u5bf9\u8fd9\u5757\u7a7a\u95f4\u8fdb\u884c\u521d\u59cb\u5316\uff0c\u8c03\u7528\u8be5\u51fd\u6570\u65f6\u4f1a\u4f20\u5165\u8fd9\u5757\u7a7a\u95f4\u7684\u5730\u5740\u548c\u7528\u6237\u4f20\u5165\u7684\u53c2\u6570\uff08\u9700\u8981\u7ecf\u8fc7\u5b8c\u7f8e\u8f6c\u53d1\uff09\u3002<\/li>\n\n\n\n<li>\u5728allocator_traits::construct\u51fd\u6570\u4e2d\u4f1a\u4f7f\u7528\u5b9a\u4f4dnew\u8868\u8fbe\u5f0f\uff0c\u663e\u793a\u8c03\u7528\u6784\u9020\u51fd\u6570\u5bf9\u8fd9\u5757\u7a7a\u95f4\u8fdb\u884c\u521d\u59cb\u5316\uff0c\u8c03\u7528\u6784\u9020\u51fd\u6570\u65f6\u4f1a\u4f20\u5165\u7528\u6237\u4f20\u5165\u7684\u53c2\u6570\uff08\u9700\u8981\u7ecf\u8fc7\u5b8c\u7f8e\u8f6c\u53d1\uff09\u3002<\/li>\n\n\n\n<li>\u5c06\u521d\u59cb\u5316\u597d\u7684\u65b0\u7ed3\u70b9\u63d2\u5165\u5230\u5bf9\u5e94\u7684\u6570\u636e\u7ed3\u6784\u5f53\u4e2d\uff0c\u6bd4\u5982list\u5bb9\u5668\u5c31\u662f\u5c06\u65b0\u7ed3\u70b9\u63d2\u5165\u5230\u5e95\u5c42\u7684\u53cc\u94fe\u8868\u4e2d\u3002<\/li>\n<\/ol>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>emplace\u7cfb\u5217\u63a5\u53e3\u7684\u610f\u4e49<\/p>\n<\/blockquote>\n\n\n\n<p>\u7531\u4e8eemplace\u7cfb\u5217\u63a5\u53e3\u7684\u53ef\u53d8\u6a21\u677f\u53c2\u6570\u7684\u7c7b\u578b\u90fd\u662f\u4e07\u80fd\u5f15\u7528\uff0c\u56e0\u6b64\u65e2\u53ef\u4ee5\u63a5\u6536\u5de6\u503c\u5bf9\u8c61\uff0c\u4e5f\u53ef\u4ee5\u63a5\u6536\u53f3\u503c\u5bf9\u8c61\uff0c\u8fd8\u53ef\u4ee5\u63a5\u6536\u53c2\u6570\u5305\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5982\u679c\u8c03\u7528emplace\u7cfb\u5217\u63a5\u53e3\u65f6\u4f20\u5165\u7684\u662f\u5de6\u503c\u5bf9\u8c61\uff0c\u90a3\u4e48\u9996\u5148\u9700\u8981\u5148\u5728\u6b64\u4e4b\u524d\u8c03\u7528\u6784\u9020\u51fd\u6570\u5b9e\u4f8b\u5316\u51fa\u4e00\u4e2a\u5de6\u503c\u5bf9\u8c61\uff0c\u6700\u7ec8\u5728\u4f7f\u7528\u5b9a\u4f4dnew\u8868\u8fbe\u5f0f\u8c03\u7528\u6784\u9020\u51fd\u6570\u5bf9\u7a7a\u95f4\u8fdb\u884c\u521d\u59cb\u5316\u65f6\uff0c\u4f1a\u5339\u914d\u5230\u62f7\u8d1d\u6784\u9020\u51fd\u6570\u3002<\/li>\n\n\n\n<li>\u5982\u679c\u8c03\u7528emplace\u7cfb\u5217\u63a5\u53e3\u65f6\u4f20\u5165\u7684\u662f\u53f3\u503c\u5bf9\u8c61\uff0c\u90a3\u4e48\u5c31\u9700\u8981\u5728\u6b64\u4e4b\u524d\u8c03\u7528\u6784\u9020\u51fd\u6570\u5b9e\u4f8b\u5316\u51fa\u4e00\u4e2a\u53f3\u503c\u5bf9\u8c61\uff0c\u6700\u7ec8\u5728\u4f7f\u7528\u5b9a\u4f4dnew\u8868\u8fbe\u5f0f\u8c03\u7528\u6784\u9020\u51fd\u6570\u5bf9\u7a7a\u95f4\u8fdb\u884c\u521d\u59cb\u5316\u65f6\uff0c\u5c31\u4f1a\u5339\u914d\u5230\u79fb\u52a8\u6784\u9020\u51fd\u6570\u3002<\/li>\n\n\n\n<li>\u5982\u679c\u8c03\u7528emplace\u7cfb\u5217\u63a5\u53e3\u65f6\u4f20\u5165\u7684\u662f\u53c2\u6570\u5305\uff0c\u90a3\u5c31\u53ef\u4ee5\u76f4\u63a5\u8c03\u7528\u51fd\u6570\u8fdb\u884c\u63d2\u5165\uff0c\u5e76\u4e14\u6700\u7ec8\u5728\u4f7f\u7528\u5b9a\u4f4dnew\u8868\u8fbe\u5f0f\u8c03\u7528\u6784\u9020\u51fd\u6570\u5bf9\u7a7a\u95f4\u8fdb\u884c\u521d\u59cb\u5316\u65f6\uff0c\u5339\u914d\u5230\u7684\u662f\u6784\u9020\u51fd\u6570\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>\u603b\u7ed3\u4e00\u4e0b\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f20\u5165\u5de6\u503c\u5bf9\u8c61\uff0c\u9700\u8981\u8c03\u7528\u6784\u9020\u51fd\u6570+\u62f7\u8d1d\u6784\u9020\u51fd\u6570\u3002<\/li>\n\n\n\n<li>\u4f20\u5165\u53f3\u503c\u5bf9\u8c61\uff0c\u9700\u8981\u8c03\u7528\u6784\u9020\u51fd\u6570+\u79fb\u52a8\u6784\u9020\u51fd\u6570\u3002<\/li>\n\n\n\n<li>\u4f20\u5165\u53c2\u6570\u5305\uff0c\u53ea\u9700\u8981\u8c03\u7528\u6784\u9020\u51fd\u6570\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u5f53\u7136\uff0c\u8fd9\u91cc\u7684\u524d\u63d0\u662f\u5bb9\u5668\u4e2d\u5b58\u50a8\u7684\u5143\u7d20\u6240\u5bf9\u5e94\u7684\u7c7b\uff0c\u662f\u4e00\u4e2a\u9700\u8981\u6df1\u62f7\u8d1d\u7684\u7c7b\uff0c\u5e76\u4e14\u8be5\u7c7b\u5b9e\u73b0\u4e86\u79fb\u52a8\u6784\u9020\u51fd\u6570\u3002\u5426\u5219\u8c03\u7528emplace\u7cfb\u5217\u63a5\u53e3\u65f6\uff0c\u4f20\u5165\u5de6\u503c\u5bf9\u8c61\u548c\u4f20\u5165\u53f3\u503c\u5bf9\u8c61\u7684\u6548\u679c\u90fd\u662f\u4e00\u6837\u7684\uff0c\u90fd\u9700\u8981\u8c03\u7528\u4e00\u6b21\u6784\u9020\u51fd\u6570\u548c\u4e00\u6b21\u62f7\u8d1d\u6784\u9020\u51fd\u6570\u3002<\/p>\n\n\n\n<p>\u5b9e\u9645emplace\u7cfb\u5217\u63a5\u53e3\u7684\u4e00\u90e8\u5206\u529f\u80fd\u548c\u539f\u6709\u5404\u4e2a\u5bb9\u5668\u63d2\u5165\u63a5\u53e3\u662f\u91cd\u53e0\u7684\uff0c\u56e0\u4e3a\u5bb9\u5668\u539f\u6709\u7684push_back\u3001push_front\u548cinsert\u51fd\u6570\u4e5f\u63d0\u4f9b\u4e86\u53f3\u503c\u5f15\u7528\u7248\u672c\u7684\u63a5\u53e3\uff0c\u5982\u679c\u8c03\u7528\u8fd9\u4e9b\u63a5\u53e3\u65f6\u5982\u679c\u4f20\u5165\u7684\u662f\u53f3\u503c\u5bf9\u8c61\uff0c\u90a3\u4e48\u6700\u7ec8\u4e5f\u662f\u4f1a\u8c03\u7528\u5bf9\u5e94\u7684\u79fb\u52a8\u6784\u9020\u51fd\u6570\u8fdb\u884c\u8d44\u6e90\u7684\u79fb\u52a8\u7684\u3002<\/p>\n\n\n\n<p><strong>emplace\u63a5\u53e3\u7684\u610f\u4e49\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>emplace\u7cfb\u5217\u63a5\u53e3\u6700\u5927\u7684\u7279\u70b9\u5c31\u662f\u652f\u6301\u4f20\u5165\u53c2\u6570\u5305\uff0c\u7528\u8fd9\u4e9b\u53c2\u6570\u5305\u76f4\u63a5\u6784\u9020\u51fa\u5bf9\u8c61\uff0c\u8fd9\u6837\u5c31\u80fd\u51cf\u5c11\u4e00\u6b21\u62f7\u8d1d\uff0c\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u6709\u4eba\u8bf4emplace\u7cfb\u5217\u63a5\u53e3\u66f4\u9ad8\u6548\u7684\u539f\u56e0\u3002<\/li>\n\n\n\n<li>\u4f46emplace\u7cfb\u5217\u63a5\u53e3\u5e76\u4e0d\u662f\u5728\u6240\u6709\u573a\u666f\u4e0b\u90fd\u6bd4\u539f\u6709\u7684\u63d2\u5165\u63a5\u53e3\u9ad8\u6548\uff0c\u5982\u679c\u4f20\u5165\u7684\u662f\u5de6\u503c\u5bf9\u8c61\u6216\u53f3\u503c\u5bf9\u8c61\uff0c\u90a3\u4e48emplace\u7cfb\u5217\u63a5\u53e3\u7684\u6548\u7387\u5176\u5b9e\u548c\u539f\u6709\u7684\u63d2\u5165\u63a5\u53e3\u7684\u6548\u7387\u662f\u4e00\u6837\u7684\u3002<\/li>\n\n\n\n<li>emplace\u7cfb\u5217\u63a5\u53e3\u771f\u6b63\u9ad8\u6548\u7684\u60c5\u51b5\u662f\u4f20\u5165\u53c2\u6570\u5305\u7684\u65f6\u5019\uff0c\u76f4\u63a5\u901a\u8fc7\u53c2\u6570\u5305\u6784\u9020\u51fa\u5bf9\u8c61\uff0c\u907f\u514d\u4e86\u4e2d\u9014\u7684\u4e00\u6b21\u62f7\u8d1d\u3002<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u9a8c\u8bc1<\/p>\n<\/blockquote>\n\n\n\n<p>\u5982\u679c\u8981\u9a8c\u8bc1\u6211\u4eec\u4e0a\u8ff0\u5bf9emplace\u7cfb\u5217\u63a5\u53e3\u7684\u8bf4\u6cd5\uff0c\u9700\u8981\u501f\u52a9\u4e00\u4e2a\u6df1\u62f7\u8d1d\u7684\u7c7b\uff0c\u4e0b\u9762\u6a21\u62df\u5b9e\u73b0\u4e86\u4e00\u4e2a\u7b80\u5316\u7248\u7684string\u7c7b\uff0c\u7c7b\u5f53\u4e2d\u53ea\u7f16\u5199\u4e86\u6211\u4eec\u9700\u8981\u7528\u5230\u7684\u6210\u5458\u51fd\u6570\u3002<\/p>\n\n\n\n<p>\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>namespace cl\n{\n    class string\n    {\n    public:\n        \/\/\u6784\u9020\u51fd\u6570\n        string(const char* str = \"\")\n        {\n            cout &lt;&lt; \"string(const char* str) -- \u6784\u9020\u51fd\u6570\" &lt;&lt; endl;\n\n            _size = strlen(str); \/\/\u521d\u59cb\u65f6\uff0c\u5b57\u7b26\u4e32\u5927\u5c0f\u8bbe\u7f6e\u4e3a\u5b57\u7b26\u4e32\u957f\u5ea6\n            _capacity = _size; \/\/\u521d\u59cb\u65f6\uff0c\u5b57\u7b26\u4e32\u5bb9\u91cf\u8bbe\u7f6e\u4e3a\u5b57\u7b26\u4e32\u957f\u5ea6\n            _str = new char&#91;_capacity + 1]; \/\/\u4e3a\u5b58\u50a8\u5b57\u7b26\u4e32\u5f00\u8f9f\u7a7a\u95f4\uff08\u591a\u5f00\u4e00\u4e2a\u7528\u4e8e\u5b58\u653e'\\0'\uff09\n            strcpy(_str, str); \/\/\u5c06C\u5b57\u7b26\u4e32\u62f7\u8d1d\u5230\u5df2\u5f00\u597d\u7684\u7a7a\u95f4\n        }\n        \/\/\u4ea4\u6362\u4e24\u4e2a\u5bf9\u8c61\u7684\u6570\u636e\n        void swap(string&amp; s)\n        {\n            \/\/\u8c03\u7528\u5e93\u91cc\u7684swap\n            ::swap(_str, s._str); \/\/\u4ea4\u6362\u4e24\u4e2a\u5bf9\u8c61\u7684C\u5b57\u7b26\u4e32\n            ::swap(_size, s._size); \/\/\u4ea4\u6362\u4e24\u4e2a\u5bf9\u8c61\u7684\u5927\u5c0f\n            ::swap(_capacity, s._capacity); \/\/\u4ea4\u6362\u4e24\u4e2a\u5bf9\u8c61\u7684\u5bb9\u91cf\n        }\n        \/\/\u62f7\u8d1d\u6784\u9020\u51fd\u6570\uff08\u73b0\u4ee3\u5199\u6cd5\uff09\n        string(const string&amp; s)\n            :_str(nullptr)\n            , _size(0)\n            , _capacity(0)\n        {\n            cout &lt;&lt; \"string(const string&amp; s) -- \u62f7\u8d1d\u6784\u9020\" &lt;&lt; endl;\n\n            string tmp(s._str); \/\/\u8c03\u7528\u6784\u9020\u51fd\u6570\uff0c\u6784\u9020\u51fa\u4e00\u4e2aC\u5b57\u7b26\u4e32\u4e3as._str\u7684\u5bf9\u8c61\n            swap(tmp); \/\/\u4ea4\u6362\u8fd9\u4e24\u4e2a\u5bf9\u8c61\n        }\n        \/\/\u79fb\u52a8\u6784\u9020\n        string(string&amp;&amp; s)\n            :_str(nullptr)\n            , _size(0)\n            , _capacity(0)\n        {\n            cout &lt;&lt; \"string(string&amp;&amp; s) -- \u79fb\u52a8\u6784\u9020\" &lt;&lt; endl;\n            swap(s);\n        }\n        \/\/\u62f7\u8d1d\u8d4b\u503c\u51fd\u6570\uff08\u73b0\u4ee3\u5199\u6cd5\uff09\n        string&amp; operator=(const string&amp; s)\n        {\n            cout &lt;&lt; \"string&amp; operator=(const string&amp; s) -- \u6df1\u62f7\u8d1d\" &lt;&lt; endl;\n\n            string tmp(s); \/\/\u7528s\u62f7\u8d1d\u6784\u9020\u51fa\u5bf9\u8c61tmp\n            swap(tmp); \/\/\u4ea4\u6362\u8fd9\u4e24\u4e2a\u5bf9\u8c61\n            return *this; \/\/\u8fd4\u56de\u5de6\u503c\uff08\u652f\u6301\u8fde\u7eed\u8d4b\u503c\uff09\n        }\n        \/\/\u79fb\u52a8\u8d4b\u503c\n        string&amp; operator=(string&amp;&amp; s)\n        {\n            cout &lt;&lt; \"string&amp; operator=(string&amp;&amp; s) -- \u79fb\u52a8\u8d4b\u503c\" &lt;&lt; endl;\n            swap(s);\n            return *this;\n        }\n        \/\/\u6790\u6784\u51fd\u6570\n        ~string()\n        {\n            \/\/delete&#91;] _str;  \/\/\u91ca\u653e_str\u6307\u5411\u7684\u7a7a\u95f4\n            _str = nullptr; \/\/\u53ca\u65f6\u7f6e\u7a7a\uff0c\u9632\u6b62\u975e\u6cd5\u8bbf\u95ee\n            _size = 0;      \/\/\u5927\u5c0f\u7f6e0\n            _capacity = 0;  \/\/\u5bb9\u91cf\u7f6e0\n        }\n    private:\n        char* _str;\n        size_t _size;\n        size_t _capacity;\n    };\n}<\/code><\/pre>\n\n\n\n<p>\u7531\u4e8e\u6211\u4eec\u5728string\u7684\u6784\u9020\u51fd\u6570\u3001\u62f7\u8d1d\u6784\u9020\u51fd\u6570\u548c\u79fb\u52a8\u6784\u9020\u51fd\u6570\u5f53\u4e2d\u5747\u6253\u5370\u4e86\u4e00\u6761\u63d0\u793a\u8bed\u53e5\uff0c\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u63a7\u5236\u53f0\u8f93\u51fa\u6765\u5224\u65ad\u8fd9\u4e9b\u51fd\u6570\u662f\u5426\u88ab\u8c03\u7528\u3002<\/p>\n\n\n\n<p>\u4e0b\u9762\u6211\u4eec\u7528\u4e00\u4e2a\u5bb9\u5668\u6765\u5b58\u50a8\u6a21\u62df\u5b9e\u73b0\u7684string\uff0c\u5e76\u4ee5\u4e0d\u540c\u7684\u4f20\u53c2\u5f62\u5f0f\u8c03\u7528emplace\u7cfb\u5217\u51fd\u6570\u3002\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int main()\n{\n    list&lt;pair&lt;int, cl::string&gt;&gt; mylist;\n\n    pair&lt;int, cl::string&gt; kv(1, \"one\");\n    mylist.emplace_back(kv);                              \/\/\u4f20\u5de6\u503c\n    cout &lt;&lt; endl;\n    mylist.emplace_back(pair&lt;int, cl::string&gt;(2, \"two\")); \/\/\u4f20\u53f3\u503c\n    cout &lt;&lt; endl;\n    mylist.emplace_back(3, \"three\");                      \/\/\u4f20\u53c2\u6570\u5305\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a<img decoding=\"async\" src=\"https:\/\/cdn.codergodv.xyz\/2fee01706fb1fa0352f5df467906b221.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"><\/p>\n\n\n\n<p><strong>\u8bf4\u660e\u4e00\u4e0b\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6a21\u62df\u5b9e\u73b0string\u7684\u62f7\u8d1d\u6784\u9020\u51fd\u6570\u65f6\u590d\u7528\u4e86\u6784\u9020\u51fd\u6570\uff0c\u56e0\u6b64\u5728\u8c03\u7528string\u62f7\u8d1d\u6784\u9020\u7684\u540e\u9762\u4f1a\u7d27\u8ddf\u7740\u8c03\u7528\u4e00\u6b21\u6784\u9020\u51fd\u6570\u3002<\/li>\n\n\n\n<li>\u4e3a\u4e86\u66f4\u597d\u7684\u4f53\u73b0\u51fa\u53c2\u6570\u5305\u7684\u6982\u5ff5\uff0c\u56e0\u6b64\u8fd9\u91cclist\u5bb9\u5668\u4e2d\u5b58\u50a8\u7684\u5143\u7d20\u7c7b\u578b\u662fpair\uff0c\u6211\u4eec\u662f\u901a\u8fc7\u89c2\u5bdfstring\u5bf9\u8c61\u7684\u5904\u7406\u8fc7\u7a0b\u6765\u5224\u65adpair\u7684\u5904\u7406\u8fc7\u7a0b\u7684\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u91cc\u4e5f\u53ef\u4ee5\u4ee5\u4e0d\u540c\u7684\u4f20\u53c2\u65b9\u5f0f\u8c03\u7528push_back\u51fd\u6570\uff0c\u987a\u4fbf\u9a8c\u8bc1\u4e00\u4e0b\u5bb9\u5668\u539f\u6709\u7684\u63d2\u5165\u51fd\u6570\u7684\u6267\u884c\u903b\u8f91\u3002\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int main()\n{\n    list&lt;pair&lt;int, cl::string&gt;&gt; mylist;\n\n    pair&lt;int, cl::string&gt; kv(1, \"one\");\n    mylist.push_back(kv);                              \/\/\u4f20\u5de6\u503c\n    cout &lt;&lt; endl;\n    mylist.push_back(pair&lt;int, cl::string&gt;(2, \"two\")); \/\/\u4f20\u53f3\u503c\n    cout &lt;&lt; endl;\n    mylist.push_back({ 3, \"three\" });                  \/\/\u5217\u8868\u521d\u59cb\u5316\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a<img decoding=\"async\" src=\"https:\/\/cdn.codergodv.xyz\/9e01352caa28146bfd063e1b187e1fed.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u53ef\u53d8\u53c2\u6570\u6a21\u677f\u7684\u6982\u5ff5 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