{"rsdb":{"rid":"244428","subhead":"","postdate":"0","aid":"168205","fid":"49","uid":"1","topic":"1","content":"<div id=\"Article\"> \n <p>\u6211\u4eec\u77e5\u9053\u5728<a href=https:\/\/www.cppentry.com\/list.php?fid=49 style=text-decoration:underline;font-size:14px;color:#F70968; target=_blank>C++<\/a>\u4e2d\u8981\u8c03\u7528\u7c7b\u7684\u79c1\u6709\u65b9\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u53cb\u5458\uff08friend\uff09\u7684\u65b9\u5f0f\u3002\u4f46\u5176\u5b9e\u5982\u679c\u6211\u4eec\u77e5\u9053\u7c7b\u7684\u5b9a\u4e49\uff0c\u5b8c\u5168\u53ef\u4ee5\u6839\u636e\u8be5\u7c7b\u5bf9\u8c61\u7684\u5185\u5b58\u5e03\u5c40\u6765\u76f4\u63a5\u8c03\u7528\u5b83\u7684\u79c1\u6709\u51fd\u6570\u3002<\/p> \n <p>\u672c\u6587\u4f5c\u4e3a\u201c<a href=https:\/\/www.cppentry.com\/list.php?fid=49 style=text-decoration:underline;font-size:14px;color:#F70968; target=_blank>C++<\/a>\u865a\u51fd\u6570\u5b9e\u73b0\u539f\u7406\u201d\u7684\u540e\u7eed\u6587\u7ae0\uff0c\u5e76\u4e0d\u6253\u7b97\u4ecb\u7ecd\u7c7b\u7684\u5185\u5b58\u5e03\u5c40\uff0c\u672c\u6587\u53ea\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528\u865a\u51fd\u6570\u8868\u7684\u65b9\u5f0f\u6765\u8c03\u7528\u8be5\u7c7b\u7684\u79c1\u6709\u865a\u51fd\u6570\u3002<\/p> \n <p>\u73b0\u6709\u5982\u4e0bTest\u7c7b\uff0c\u63d0\u4f9b\u4e86\u4e00\u4e2a\u79c1\u6709\u865a\u51fd\u6570virtual void Func()\uff1a<\/p> \n <pre class=\"brush:java;\">\r\n\r\nclass Test {\r\npublic:\r\n    Test() {\r\n\r\n    }\r\n\r\n    virtual~ Test() {\r\n\r\n    }\r\n\r\nprivate:\r\n    virtual void Func() {\r\n        printf(&quot;Private Function\\n&quot;);\r\n    }\r\n};<\/pre> \n <p>\u73b0\u5728\u6211\u4eec\u4f7f\u7528\u865a\u51fd\u6570\u8868\u6765\u8c03\u7528Func\u6210\u5458\u51fd\u6570\uff1a<\/p> \n <pre class=\"brush:java;\">\r\ntypedef void(*PFN_Func)();\r\n\r\nint main()\r\n{\r\n    Test t;\r\n    unsigned long **VirtualTable = (unsigned long **)(&amp;t);\r\n    unsigned long FuncAddr = VirtualTable[0][1];\r\n\r\n    PFN_Func pfnFunc = (PFN_Func)FuncAddr;\r\n    if (pfnFunc) {\r\n        pfnFunc();\r\n    }\r\n\r\n    return 0;\r\n}<\/pre> \n <p>\u6211\u4eec\u77e5\u9053\u865a\u51fd\u6570\u8868\u5176\u5b9e\u5c31\u662f\u4e00\u4e2a\u4e8c\u7ef4\u6570\u7ec4\u3002\u56e0\u4e3a\u793a\u4f8b\u4e2d\u7684Test\u7c7b\u6ca1\u6709\u7ee7\u627f\u4e8e\u5176\u4ed6\u7c7b\uff0c\u6240\u4ee5\u7b2c\u4e00\u7ef4\u53ea\u6709\u4e00\u4e2a\u5143\u7d20\uff1b\u53c8\u56e0Test\u7c7b\u67092\u4e2a\u865a\u51fd\u6570\uff0c\u6545\u7b2c\u4e8c\u7ef4\u67092\u4e2a\u5143\u7d20\uff0c\u4e14Func\u6392\u5728\u7b2c\u4e8c\u4e2a\uff0c\u6240\u4ee5\u7528VirtualTable[0][1]\u6765\u53d6Func\u51fd\u6570\u5730\u5740\u3002<\/p> \n <p>\u56e0\u4e3a\u8be5\u793a\u4f8b\u8fd0\u884c\u5728MSVC\u7f16\u8bd1\u5668\u73af\u5883\uff0c\u6240\u4ee5\u9ed8\u8ba4\u8ba4\u4e3a\u865a\u51fd\u6570\u8868\u4f4d\u4e8e\u7c7b\u5bf9\u8c61\u5185\u5b58\u5e03\u5c40\u7684\u8d77\u59cb\u4f4d\u7f6e\uff0c\u6545\u76f4\u63a5\u4f7f\u7528\u4e86unsigned long **VirtualTable = (unsigned long **)(&amp;t);\u3002<\/p> \n <p>\u4e25\u8c28\u7684\u505a\u6cd5\u5e94\u8be5\u662f\u5148\u5224\u65ad\u865a\u51fd\u6570\u8868\u662f\u5426\u4f4d\u4e8e\u5185\u5b58\u5e03\u5c40\u8d77\u59cb\u4f4d\u7f6e\u3002<\/p> \n<\/div>","orderid":"0","title":"C++\u865a\u51fd\u6570\u8868\u7684\u5e94\u7528\u8be6\u89e3","smalltitle":"","mid":"0","fname":"c++\u7f16\u7a0b\u57fa\u7840","special_id":"0","bak_id":"0","info":"0","hits":"135","pages":"1","comments":"0","posttime":"2018-02-13 12:56:04","list":"1518497764","username":"admin","author":"","copyfrom":"","copyfromurl":"","titlecolor":"","fonttype":"0","titleicon":"0","picurl":"https:\/\/www.cppentry.com\/upload_files\/","ispic":"0","yz":"1","yzer":"","yztime":"0","levels":"0","levelstime":"0","keywords":"<A HREF='https:\/\/www.cppentry.com\/do\/search.php?type=keyword&keyword=%BA%AF%CA%FD' target=_blank>\u51fd\u6570<\/A> <A HREF='https:\/\/www.cppentry.com\/do\/search.php?type=keyword&keyword=%D3%A6%D3%C3' target=_blank>\u5e94\u7528<\/A> <A HREF='https:\/\/www.cppentry.com\/do\/search.php?type=keyword&keyword=%CF%EA%BD%E2' target=_blank>\u8be6\u89e3<\/A>","jumpurl":"","iframeurl":"","style":"","template":"a:3:{s:4:\"head\";s:0:\"\";s:4:\"foot\";s:0:\"\";s:8:\"bencandy\";s:0:\"\";}","target":"0","ip":"113.87.122.142","lastfid":"0","money":"0","buyuser":"","passwd":"","allowdown":"","allowview":"","editer":"","edittime":"0","begintime":"0","endtime":"0","description":"C++\u865a\u51fd\u6570\u8868\u7684\u5e94\u7528\u8be6\u89e3","lastview":"1699893239","digg_num":"3","digg_time":"1713288484","forbidcomment":"0","ifvote":"0","heart":"","htmlname":"","city_id":"0"},"page":"1"}