{"id":53169,"date":"2025-08-12T02:34:27","date_gmt":"2025-08-11T18:34:27","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/53169.html"},"modified":"2025-08-12T02:34:27","modified_gmt":"2025-08-11T18:34:27","slug":"%e4%b8%80%e6%96%87%e5%ad%a6%e4%bc%9ac%e5%a4%9a%e6%80%81","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/53169.html","title":{"rendered":"\u4e00\u6587\u5b66\u4f1ac++\u591a\u6001"},"content":{"rendered":"<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>\u591a\u6001\u7684\u5b9a\u4e49\u53ca\u5b9e\u73b0<\/li>\n<li>\n<ul>\n<li>\u6784\u6210\u591a\u6001\u4e24\u4e2a\u6761\u4ef6<\/li>\n<li>\u2b50\u865a\u51fd\u6570<\/li>\n<li>\u865a\u51fd\u6570\u68c0\u67e5<\/li>\n<\/ul>\n<\/li>\n<li>\u91cd\u8f7d&#xff0c;\u91cd\u5199&#xff0c;\u91cd\u5b9a\u4e49\u533a\u522b<\/li>\n<li>\u62bd\u8c61\u7c7b<\/li>\n<li>\n<ul>\n<li>\u5b9e\u73b0\u7ee7\u627f\u548c\u63a5\u53e3\u7ee7\u627f<\/li>\n<\/ul>\n<\/li>\n<li>\u591a\u6001\u7684\u539f\u7406&#x1f6a9;<\/li>\n<li>\n<ul>\n<li>\u865a\u51fd\u6570\u8868<\/li>\n<li>\u539f\u7406<\/li>\n<li>\u9759\u6001\u7ed1\u5b9a\u4e0e\u52a8\u6001\u7ed1\u5b9a<\/li>\n<li>\u591a\u7ee7\u627f<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>\u591a\u6001\u7684\u5b9a\u4e49\u53ca\u5b9e\u73b0<\/h2>\n<p>\u5750\u516c\u4ea4\u65f6&#xff0c;\u7231\u5fc3\u5361&#xff0c;\u5b66\u751f\u5361&#xff0c;\u8001\u4eba\u5361\u8f66\u7968\u4e0d\u4e00\u6837\u4ef7\u94b1&#xff0c;\u8fd9\u5c31\u662f\u4e00\u79cd\u591a\u6001<\/p>\n<p>\u591a\u6001\u5728\u4e0d\u540c\u7ee7\u627f\u5173\u7cfb\u7684\u7c7b\u5bf9\u8c61&#xff0c;\u8c03\u7528\u540c\u4e00\u51fd\u6570&#xff0c;\u4ea7\u751f\u4e0d\u540c\u884c\u4e3a<\/p>\n<h3>\u6784\u6210\u591a\u6001\u4e24\u4e2a\u6761\u4ef6<\/h3>\n<ul>\n<li>\u5fc5\u987b\u662f\u57fa\u7c7b\u6307\u9488\u6216\u5f15\u7528\u8c03\u7528\u865a\u51fd\u6570<\/li>\n<li>\u6d3e\u751f\u7c7b\u865a\u51fd\u6570\u5fc5\u987b\u91cd\u5199<\/li>\n<\/ul>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\nusing namespace std<span class=\"token punctuation\">;<\/span><br \/>\nclass person<br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\npublic<span class=\"token operator\">:<\/span><br \/>\nvirtual <span class=\"token keyword\">void<\/span> <span class=\"token function\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;person&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\nclass student <span class=\"token operator\">:<\/span>public person<br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\npublic<span class=\"token operator\">:<\/span><br \/>\nvirtual <span class=\"token keyword\">void<\/span> <span class=\"token function\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;student&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span>person<span class=\"token operator\">&amp;<\/span> people<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\npeople<span class=\"token punctuation\">.<\/span><span class=\"token function\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\nperson p<span class=\"token punctuation\">;<\/span><br \/>\nstudent s<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span>p<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span>s<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>person student<\/p>\n<h3>\u2b50\u865a\u51fd\u6570<\/h3>\n<p>&#x1f6a9;\u524d\u9762\u52a0virtual\u5c31\u662f\u865a\u51fd\u6570 &#x1f6a9;\u865a\u51fd\u6570\u91cd\u5199(\u8986\u76d6)&#xff1a;\u6d3e\u751f\u7c7b\u6709\u4e00\u4e2a\u8ddf\u57fa\u7c7b\u76f8\u540c\u7684\u51fd\u6570&#xff08;\u8fd4\u56de\u7c7b\u578b&#xff0c;\u51fd\u6570\u540d\u5b57&#xff0c;\u53c2\u6570\u5217\u8868&#xff09;&#xff0c;\u4e09\u76f8\u540c&#xff0c;\u79f0\u5b50\u7c7b\u865a\u51fd\u6570\u91cd\u5199\u4e86\u57fa\u7c7b\u7684\u865a\u51fd\u6570<\/p>\n<p>\u865a\u51fd\u6570\u4e24\u4e2a\u4f8b\u5916&#xff1a; 1&#xff0c;\u534f\u53d8 \u57fa\u7c7b\u548c\u6d3e\u751f\u7c7b\u865a\u51fd\u6570\u8fd4\u56de\u7c7b\u578b\u4e0d\u540c\u3002\u5373\u57fa\u7c7b\u51fd\u6570\u8fd4\u56de\u57fa\u7c7b\u6307\u9488\u6216\u5f15\u7528&#xff0c;\u6d3e\u751f\u7c7b\u51fd\u6570\u8fd4\u56de\u6d3e\u751f\u7c7b\u6307\u9488\u6216\u5f15\u7528\u3002<\/p>\n<p>class person<br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\npublic<span class=\"token operator\">:<\/span><br \/>\nvirtual person<span class=\"token operator\">*<\/span> <span class=\"token function\">test<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">return<\/span> new person<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\nclass student <span class=\"token operator\">:<\/span>public person<br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\npublic<span class=\"token operator\">:<\/span><br \/>\nvirtual student<span class=\"token operator\">*<\/span> <span class=\"token function\">test<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">return<\/span> new student<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>2&#xff0c;\u6790\u6784\u51fd\u6570 &#x1f6a9;\u6790\u6784\u51fd\u6570\u9ed8\u8ba4\u6784\u6210\u591a\u6001&#xff0c;\u65e0\u8bba\u52a0\u4e0d\u52a0virtual&#xff0c;\u7f16\u8bd1\u5668\u5bf9\u6790\u6784\u51fd\u6570\u540d\u79f0\u7279\u6b8a\u5904\u7406&#xff0c;\u5904\u7406\u540e\u6790\u6784\u51fd\u6570\u901a\u79f0destructor<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\nusing namespace std<span class=\"token punctuation\">;<\/span><br \/>\nclass person<br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\npublic<span class=\"token operator\">:<\/span><br \/>\nvirtual <span class=\"token operator\">~<\/span><span class=\"token function\">person<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;~person()&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\nclass student <span class=\"token operator\">:<\/span>public person<br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\npublic<span class=\"token operator\">:<\/span><br \/>\nvirtual <span class=\"token operator\">~<\/span><span class=\"token function\">student<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;~student()&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\nperson<span class=\"token operator\">*<\/span> p1 <span class=\"token operator\">&#061;<\/span> new <span class=\"token function\">person<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nperson<span class=\"token operator\">*<\/span> p2 <span class=\"token operator\">&#061;<\/span> new <span class=\"token function\">student<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\ndelete p1<span class=\"token punctuation\">;<\/span><br \/>\ndelete p2<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>~person() ~student() ~person()<\/p>\n<h3>\u865a\u51fd\u6570\u68c0\u67e5<\/h3>\n<p>\u51fd\u6570\u91cd\u5199\u6bd4\u8f83\u4e25\u683c&#xff0c;\u6709\u65f6\u51fd\u6570\u540d\u5199\u9519&#xff0c;\u7f16\u8bd1\u662f\u68c0\u67e5\u4e0d\u51fa\u6765\u7684&#xff0c;\u8fd0\u884c\u540e\u6ca1\u5f97\u5230\u9884\u671f\u7ed3\u679c\u624d\u53bb\u627ebug&#xff0c;c&#043;&#043;11\u63d0\u4f9b\u4e24\u4e2a\u5173\u952e\u8bcd&#061;&#061;final&#xff0c;override&#xff0c;&#061;&#061;\u6765\u68c0\u67e5\u91cd\u5199 1&#xff0c;final&#xff1a;\u865a\u51fd\u6570\u4e0d\u51c6\u88ab\u91cd\u5199&#xff0c;\u5426\u5219\u7f16\u8bd1\u4e0d\u901a\u8fc7<\/p>\n<p>class person<br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\npublic<span class=\"token operator\">:<\/span><br \/>\nvirtual <span class=\"token keyword\">void<\/span> <span class=\"token function\">A<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> final<br \/>\n<span class=\"token punctuation\">{<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\nclass student <span class=\"token operator\">:<\/span>public person<br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\npublic<span class=\"token operator\">:<\/span><br \/>\nvirtual <span class=\"token keyword\">void<\/span> <span class=\"token function\">A<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>2&#xff0c;override&#xff1a;\u68c0\u67e5\u51fd\u6570\u662f\u5426\u91cd\u5199\u4e86\u67d0\u4e2a\u57fa\u7c7b\u51fd\u6570&#xff0c;\u6ca1\u91cd\u5199\u5219\u7f16\u8bd1\u62a5\u9519<\/p>\n<p>class person<br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\npublic<span class=\"token operator\">:<\/span><br \/>\nvirtual <span class=\"token keyword\">void<\/span> <span class=\"token function\">A<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\nclass student <span class=\"token operator\">:<\/span> public person<br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\npublic<span class=\"token operator\">:<\/span><br \/>\nvirtual <span class=\"token keyword\">void<\/span> <span class=\"token function\">A<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> override<br \/>\n<span class=\"token punctuation\">{<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h2>\u91cd\u8f7d&#xff0c;\u91cd\u5199&#xff0c;\u91cd\u5b9a\u4e49\u533a\u522b<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811183423-689a37af3cab6.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h2>\u62bd\u8c61\u7c7b<\/h2>\n<p>\u5728\u865a\u51fd\u6570\u540e\u9762\u52a0\u4e0a &#061;0 \u5219\u4e3a\u7eaf\u865a\u51fd\u6570&#xff0c;\u5305\u542b\u7eaf\u865a\u51fd\u6570\u7684\u7c7b\u53eb\u62bd\u8c61\u7c7b&#xff0c;\u4e5f\u53eb\u63a5\u53e3\u7c7b&#xff0c;\u62bd\u8c61\u7c7b\u4e0d\u80fd\u5b9e\u4f8b\u5316\u5bf9\u8c61&#xff0c;\u6d3e\u751f\u7c7b\u7ee7\u627f\u540e\u4e5f\u4e0d\u80fd\u5b9e\u4f8b\u5316\u5bf9\u8c61&#xff0c;\u53ea\u6709\u91cd\u5199\u865a\u51fd\u6570\u624d\u80fd\u5b9e\u4f8b\u5316\u5bf9\u8c61\u3002\u7eaf\u865a\u51fd\u6570\u89c4\u8303\u4e86\u6d3e\u751f\u7c7b\u5fc5\u987b\u91cd\u5199&#xff0c;\u66f4\u4f53\u73b0\u4e86\u63a5\u53e3\u7ee7\u627f\u3002<\/p>\n<p>class A<br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\npublic<span class=\"token operator\">:<\/span><br \/>\nvirtual <span class=\"token keyword\">void<\/span> <span class=\"token function\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\nclass B<br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\npublic<span class=\"token operator\">:<\/span><br \/>\nvirtual <span class=\"token keyword\">void<\/span> <span class=\"token function\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\ncout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;B&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h3>\u5b9e\u73b0\u7ee7\u627f\u548c\u63a5\u53e3\u7ee7\u627f<\/h3>\n<p>\u666e\u901a\u51fd\u6570\u7684\u7ee7\u627f\u662f\u5b9e\u73b0\u7ee7\u627f&#xff0c;\u6d3e\u751f\u7c7b\u7ee7\u627f\u57fa\u7c7b\u7684\u51fd\u6570&#xff0c;\u53ef\u4ee5\u4f7f\u7528&#xff0c;\u7ee7\u627f\u7684\u662f\u51fd\u6570\u7684\u5b9e\u73b0&#xff0c; \u865a\u51fd\u6570\u7684\u7ee7\u627f\u662f\u4e00\u79cd\u63a5\u53e3\u7ee7\u627f&#xff0c;\u6d3e\u751f\u7c7b\u7ee7\u627f\u7684\u662f\u865a\u51fd\u6570\u7684\u63a5\u53e3&#xff0c;\u76ee\u7684\u662f\u5b9e\u73b0\u91cd\u5199&#xff0c;\u6240\u4ee5\u4e0d\u5b9e\u73b0\u591a\u6001&#xff0c;\u4e0d\u8981\u628a\u666e\u901a\u51fd\u6570\u5b9a\u4e49\u4e3a\u865a\u51fd\u6570\u3002<\/p>\n<h2>\u591a\u6001\u7684\u539f\u7406&#x1f6a9;<\/h2>\n<h3>\u865a\u51fd\u6570\u8868<\/h3>\n<p>\u6c42A\u7c7b\u5927\u5c0f<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\nusing namespace std<span class=\"token punctuation\">;<\/span><br \/>\nclass A<br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\nvirtual <span class=\"token keyword\">void<\/span> <span class=\"token function\">func1<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><br \/>\nprivate<span class=\"token operator\">:<\/span><br \/>\n<span class=\"token keyword\">int<\/span> _a<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\ncout<span class=\"token operator\">&lt;&lt;<\/span><span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>A<span class=\"token punctuation\">)<\/span><span class=\"token operator\">&lt;&lt;<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>16 <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811183424-689a37b04a0c7.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u8fd9\u91cc_vfptr\u662f\u865a\u51fd\u6570\u8868\u6307\u9488&#xff0c;\u6211\u662f64\u4f4d\u7cfb\u7edf&#xff0c;\u6307\u94888\u5b57\u8282\u548c\u6574\u578b4\u5b57\u8282&#xff0c;\u5bf9\u9f50\u89c4\u5219\u662f16<\/p>\n<p>&#x1f6a9; \u4e00\u4e2a\u542b\u6709\u865a\u51fd\u6570\u7684\u7c7b\u90fd\u81f3\u5c11\u542b\u6709\u4e00\u4e2a\u865a\u51fd\u6570\u8868\u6307\u9488&#xff08;\u865a\u8868&#xff09;&#xff0c;\u865a\u51fd\u6570\u7684\u5730\u5740\u8981\u653e\u8fdb\u865a\u8868\u4e2d<\/p>\n<p>\u63a5\u7740\u5206\u6790\u865a\u8868<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\nusing namespace std<span class=\"token punctuation\">;<\/span><br \/>\nclass A<br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\npublic<span class=\"token operator\">:<\/span><br \/>\nvirtual <span class=\"token keyword\">void<\/span> <span class=\"token function\">func1<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><br \/>\nvirtual <span class=\"token keyword\">void<\/span> <span class=\"token function\">func2<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">func3<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">int<\/span> _a<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\nclass B <span class=\"token operator\">:<\/span>public A<br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\npublic<span class=\"token operator\">:<\/span><br \/>\nvirtual <span class=\"token keyword\">void<\/span> <span class=\"token function\">func1<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\nA a<span class=\"token punctuation\">;<\/span><br \/>\nB b<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811183424-689a37b0a21ff.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u7ed3\u8bba&#xff1a; &#x1f6a9;1&#xff0c;\u6d3e\u751f\u7c7b\u6709\u81ea\u5df1\u7684\u865a\u8868&#xff0c;\u5185\u5bb9\u7ee7\u627f\u57fa\u7c7b&#xff0c;\u5982\u679c\u6709\u91cd\u5199&#xff08;\u5982func1&#xff09;\u5219\u8986\u76d6\u57fa\u7c7b\u865a\u8868\u81ea\u5df1\u4ee3\u66ff&#xff0c;\u5982\u679c\u6d3e\u751f\u7c7b\u6709\u65b0\u589e\u7684\u865a\u51fd\u6570&#xff0c;\u5219\u6309\u7167\u58f0\u660e\u987a\u5e8f\u4f9d\u6b21\u653e\u5728\u865a\u8868\u6700\u540e 2&#xff0c;func2()&#xff0c;\u662f\u865a\u51fd\u6570&#xff0c;\u7ee7\u627f\u4e0b\u6765\u653e\u8fdb\u865a\u8868&#xff0c;func3()&#xff0c;\u662f\u666e\u901a\u51fd\u6570\u5c31\u6ca1\u8fdb 3&#xff0c;\u865a\u51fd\u6570\u8868\u672c\u8d28\u662f\u6307\u9488\u6570\u7ec4&#xff0c;\u4e00\u822c\u60c5\u51b5\u4e0b\u6570\u7ec4\u672b\u5c3e\u653e\u4e00\u4e2anullptr\u3002<\/p>\n<p>4&#xff0c;\u865a\u8868\u5b58\u7684\u662f\u865a\u51fd\u6570\u6307\u9488&#xff0c;\u865a\u51fd\u6570\u548c\u666e\u901a\u51fd\u6570\u4e00\u6837&#xff0c;\u90fd\u5b58\u5728\u4ee3\u7801\u6bb5 \u5bf9\u8c61\u4e2d\u5b58\u7684\u662f\u865a\u8868\u6307\u9488&#xff0c;vs\u4e2d\u865a\u8868\u5b58\u5728\u4ee3\u7801\u6bb5<\/p>\n<h3>\u539f\u7406<\/h3>\n<p>class person<br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\npublic<span class=\"token operator\">:<\/span><br \/>\n virtual <span class=\"token keyword\">void<\/span> <span class=\"token function\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n <span class=\"token punctuation\">{<\/span><br \/>\n cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;person&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\nclass student <span class=\"token operator\">:<\/span>public person<br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\npublic<span class=\"token operator\">:<\/span><br \/>\n virtual <span class=\"token keyword\">void<\/span> <span class=\"token function\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n <span class=\"token punctuation\">{<\/span><br \/>\n cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;student&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> endl<span class=\"token punctuation\">;<\/span><br \/>\n <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span>person<span class=\"token operator\">&amp;<\/span> people<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n people<span class=\"token punctuation\">.<\/span><span class=\"token function\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n person p<span class=\"token punctuation\">;<\/span><br \/>\n student s<span class=\"token punctuation\">;<\/span><br \/>\n <span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span>p<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n <span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span>s<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5f00\u7bc7\u7684\u4ee3\u7801&#xff0c; &#x1f6a9;\u5f53\u4f20p\u65f6&#xff0c;\u57fa\u7c7b\u6307\u9488\u8c03\u7528\u57fa\u7c7b\u7684\u865a\u51fd\u6570&#xff0c;\u5f53\u4f20s\u65f6&#xff0c;\u57fa\u7c7b\u6307\u9488\u8c03\u7528\u6d3e\u751f\u7c7b\u7684\u865a\u51fd\u6570&#xff0c; \u8fd9\u6837\u5c31\u5b8c\u6210\u4e0d\u540c\u5bf9\u8c61\u5b8c\u6210\u540c\u4e00\u884c\u4e3a\u65f6&#xff0c;\u5c55\u73b0\u4e0d\u540c\u5f62\u6001\u3002<\/p>\n<p>&#x1f6a9;\u6ee1\u8db3\u591a\u6001\u7684\u51fd\u6570\u8c03\u7528\u4e0d\u662f\u5728\u7f16\u8bd1\u65f6\u786e\u5b9a\u7684&#xff0c;\u662f\u5728\u8fd0\u884c\u65f6\u5230\u5bf9\u8c61\u4e2d\u73b0\u627e\u7684\u3002\u4e0d\u6ee1\u8db3\u591a\u6001\u7684\u51fd\u6570\u7f16\u8bd1\u65f6\u5c31\u786e\u8ba4\u597d\u4e86\u3002<\/p>\n<h3>\u9759\u6001\u7ed1\u5b9a\u4e0e\u52a8\u6001\u7ed1\u5b9a<\/h3>\n<p>\u9759\u6001\u7ed1\u5b9a&#xff1a;\u53c8\u79f0\u524d\u671f\u7ed1\u5b9a&#xff0c;\u5728\u7a0b\u5e8f\u7f16\u8bd1\u65f6\u5c31\u786e\u8ba4\u7a0b\u5e8f\u884c\u4e3a&#xff0c;\u4e5f\u79f0\u9759\u6001\u591a\u6001&#xff0c;\u5982\u51fd\u6570\u91cd\u8f7d \u52a8\u6001\u7ed1\u5b9a&#xff1a;\u53c8\u79f0\u540e\u671f\u7ed1\u5b9a&#xff0c;\u5728\u7a0b\u5e8f\u8fd0\u884c\u65f6\u6839\u636e\u62ff\u5230\u7684\u5177\u4f53\u7c7b\u578b\u786e\u5b9a\u5177\u4f53\u884c\u4e3a\u53bb\u8c03\u7528\u51fd\u6570&#xff0c;\u4e5f\u79f0\u52a8\u6001\u591a\u6001<\/p>\n<h3>\u591a\u7ee7\u627f<\/h3>\n<p>\u591a\u7ee7\u627f\u672a\u91cd\u5199\u7684\u865a\u51fd\u6570\u653e\u5728\u7b2c\u4e00\u4e2a\u865a\u8868\u7684\u672b\u5c3e <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811183425-689a37b1640ee.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb450\u6b21\uff0c\u70b9\u8d5e12\u6b21\uff0c\u6536\u85cf2\u6b21\u3002\u6587\u7ae0\u6458\u8981\uff1a\u672c\u6587\u8be6\u7ec6\u8bb2\u89e3\u4e86C++\u591a\u6001\u7684\u6982\u5ff5\u3001\u5b9e\u73b0\u548c\u5e94\u7528\u3002\u9996\u5148\u901a\u8fc7\u516c\u4ea4\u5361\u793a\u4f8b\u5f62\u8c61\u8bf4\u660e\u591a\u6001\u73b0\u8c61\uff0c\u6307\u51fa\u591a\u6001\u662f\u901a\u8fc7\u57fa\u7c7b\u6307\u9488\/\u5f15\u7528\u8c03\u7528\u865a\u51fd\u6570\u65f6\u4ea7\u751f\u7684\u4e0d\u540c\u884c\u4e3a\u3002\u91cd\u70b9\u5206\u6790\u4e86\u865a\u51fd\u6570\u91cd\u5199\u89c4\u5219\u3001override\/final\u5173\u952e\u5b57\u3001\u865a\u51fd\u6570\u8868\u673a\u5236\u7b49\u6838\u5fc3\u539f\u7406\uff0c\u6bd4\u8f83\u4e86\u91cd\u8f7d\/\u91cd\u5199\/\u91cd\u5b9a\u4e49\u7684\u533a\u522b\uff0c\u5e76\u4ecb\u7ecd\u4e86\u62bd\u8c61\u7c7b\u548c\u7eaf\u865a\u51fd\u6570\u3002\u901a\u8fc7\u5185\u5b58\u5e03\u5c40\u56fe\u89e3\u9610\u91ca\u4e86\u865a\u51fd\u6570\u8868\u6307\u9488\u548c\u591a\u6001\u8c03\u7528\u673a\u5236\uff0c\u533a\u5206\u4e86\u9759\u6001\u7ed1\u5b9a\u548c\u52a8\u6001\u7ed1\u5b9a\u7684\u672c\u8d28\u5dee\u5f02\u3002\u6700\u540e\u7b80\u8981\u8bf4\u660e\u4e86\u591a\u7ee7\u627f\u573a\u666f\u4e0b\u7684\u865a\u51fd\u6570\u8868\u5904\u7406\u65b9\u5f0f\u3002\u5168\u6587\u7cfb\u7edf\u6027\u5730\u89e3\u6790\u4e86C++\u591a\u6001\u7684\u5b9e\u73b0\u539f\u7406\u548c\u6280\u672f\u7ec6\u8282\u3002<\/p>\n","protected":false},"author":2,"featured_media":53165,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,5356,174,99,190,1813,427,729],"topic":[],"class_list":{"0":"post-53169","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-server","8":"tag-c","11":"tag-java","12":"tag-190","13":"tag-1813","14":"tag-427","15":"tag-729"},"yoast_head":"<!-- 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