{"id":12,"date":"2013-03-28T13:56:13","date_gmt":"2013-03-28T05:56:13","guid":{"rendered":"http:\/\/www.yarpee.com\/?p=12"},"modified":"2013-03-28T13:56:13","modified_gmt":"2013-03-28T05:56:13","slug":"goto%e7%9a%84%e5%9d%91","status":"publish","type":"post","link":"http:\/\/www.yarpee.cn\/?p=12","title":{"rendered":"goto\u7684\u5751"},"content":{"rendered":"<p>\u8c03\u8bd5\u4e86\u4e00\u4e2acrash\uff0c\u5f88\u8be1\u5f02\uff0c\u7a0b\u5e8f\u662f\u5d29\u5728\u4e00\u4e2a\u7ebf\u7a0b\u51fd\u6570\u4e2d\u8c03\u7528\u4e00\u4e2a\u5bf9\u8c61\u7684\u865a\u51fd\u6570\u2014\u2014vptr\u88ab\u6539\u4e86\u3002<\/p>\n<p>Review\u4e86\u8fd9\u4e2a\u5bf9\u8c61\u6240\u6709\u5f15\u7528\u7684\u4ee3\u7801\u6ca1\u80fd\u53d1\u73b0\u95ee\u9898\uff0c\u53ea\u80fd\u64cd\u8d77windbg\u8c03\u8bd5\u4e86\uff0c\u597d\u5728\u8fd9\u4e2a\u95ee\u9898\u6bd4\u8f83\u5bb9\u6613\u91cd\u73b0\u3002\u8c03\u8bd5\u4e2d\u53d1\u73b0\u8fd9\u4e2a\u5bf9\u8c61\u88ab\u6b63\u786e\u7684\u6784\u9020\u4e86\u4e4b\u540e\u4e00\u76f4\u6ca1\u6709\u91ca\u653e\uff0c\u5374\u5728\u53e6\u4e00\u4e2a\u6a21\u5757\u4e2d\u901a\u8fc7new\u7533\u8bf7\u5230\u4e86\u540c\u4e00\u5757\u5185\u5b58\uff0c\u56e0\u6b64\u9020\u6210vptr\u7b49\u5185\u5bb9\u88ab\u4fee\u6539\uff0c\u7ebf\u7a0b\u51fd\u6570\u4e2d\u518d\u8c03\u7528\u5176\u865a\u51fd\u6570\u5c31\u5d29\u6e83\u4e86\u3002<\/p>\n<p>\u901a\u8fc7ba r 4 0xXXXXXXXX\u5bf9\u8fd9\u5757\u5185\u5b58\u4e0b\u4e86\u4e2a\u8bfb\u65ad\u70b9\uff0c\u51e0\u6b21\u65ad\u4e0b\u4e4b\u540e\u7ec8\u4e8e\u627e\u5230\u4e86\u7f6a\u9b41\u7978\u9996\u2014\u2014\u4e00\u4e2a\u51fd\u6570\u5185\u4e00\u4e2a\u4e34\u65f6\u7684\u6307\u9488\u53d8\u91cfdelete\u6389\u4e86\u8fd9\u5757\u5185\u5b58\u3002<\/p>\n<p>\u8fd9\u4e0d\u79d1\u5b66\uff01\u8fd9\u53ea\u662f\u4e00\u4e2a\u51fd\u6570\u5185\u7684\u4e00\u4e2a\u4e34\u65f6\u7684\u6307\u9488\u53d8\u91cf\uff0c\u521d\u59cb\u5316\u4e3aNULL\uff0c\u751a\u81f3\u903b\u8f91\u90fd\u6ca1\u6709\u8d70\u5230\u5bf9\u5b83\u8fdb\u884cnew\u8d4b\u503c\u7684\u5730\u65b9\uff0c\u600e\u4e48\u4f1a\u7a81\u7136\u6709\u4e86\u503c\uff0c\u5e76\u4e14delete\u6389\u4e00\u4e2a\u4e0d\u76f8\u5e72\u7684\u5bf9\u8c61\uff1f\uff01\u4f2a\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<p>if(!DoSomething()) \/\/ \u8fd9\u91cc\u8fd4\u56de\u7684\u662fFALSE, \u56e0\u6b64\u6ca1\u8d70\u5230new\u5bf9pData\u8d4b\u503c.<br \/>\n{<br \/>\ngoto Exit;<br \/>\n}<br \/>\nBYTE* pData = NULL;<br \/>\n&#8230;<br \/>\npData = new BYTE[1024];<br \/>\n&#8230;<br \/>\nExit:<br \/>\nif(pData != NULL)<br \/>\n{<br \/>\ndelete [] pData;<br \/>\npData = NULL;<br \/>\n}<\/p>\n<p>\u4f46\u662f\u4e8b\u5b9e\u5982\u6b64\uff0c\u53cd\u590dreview\u8fd9\u6bb5\u4ee3\u7801\u53d1\u73b0\u6700\u6709\u53ef\u80fd\u51fa\u73b0\u95ee\u9898\u7684\u5730\u65b9\u5728\u8fd9\u5904goto\u3002\u901a\u8fc7\u7f16\u5199demo\u53d1\u73b0VS 2005\u5bf9\u4e8egoto\u540e\u9762\u624d\u5b9a\u4e49\u7684\u53d8\u91cf\u53ea\u4f1a\u5728\u51fd\u6570\u8fdb\u5165\u524d\u5206\u914d\u6808\u7a7a\u95f4\uff0c\u8981\u5728\u6267\u884c\u5230goto\u540e\u9762\u7684\u8d4b\u503c\u8bed\u53e5\u65f6\u624d\u4f1a\u5bf9\u53d8\u91cf\u8fdb\u884c\u8d4b\u503c\u3002\u8fd9\u4e5f\u5c31\u8ba9delete [] pData\u5374\u91ca\u653e\u4e86\u522b\u5904\u7533\u8bf7\u7684\u5185\u5b58\u6210\u4e3a\u4e86\u53ef\u80fd\uff0c\u56e0\u4e3a\u6307\u4e0d\u5b9apData\u7684\u6808\u5185\u5bb9\u662f\u4ec0\u4e48\u5462\u3002<\/p>\n<p><strong>\u6ce8\u610f\u5e94\u5c3d\u91cf\u907f\u514d\u7528goto\uff0c\u5982\u679c\u4e00\u5b9a\u8981\u4f7f\u7528\u4fdd\u8bc1\u51fd\u6570\u8fdb\u5165\u5c31\u5b9a\u4e49\u6240\u6709\u7684\u53d8\u91cf\u5e76\u8d4b\u521d\u503c\u3002<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8c03\u8bd5\u4e86\u4e00\u4e2acrash\uff0c\u5f88\u8be1\u5f02\uff0c\u7a0b\u5e8f\u662f\u5d29\u5728\u4e00\u4e2a\u7ebf\u7a0b\u51fd\u6570\u4e2d\u8c03\u7528\u4e00\u4e2a\u5bf9\u8c61\u7684\u865a\u51fd\u6570\u2014\u2014vptr\u88ab\u6539\u4e86\u3002 Review\u4e86 &hellip; <\/p>\n<p class=\"link-more\"><a href=\"http:\/\/www.yarpee.cn\/?p=12\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">\u201cgoto\u7684\u5751\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-12","post","type-post","status-publish","format-standard","hentry","category-c_plus_plus"],"_links":{"self":[{"href":"http:\/\/www.yarpee.cn\/index.php?rest_route=\/wp\/v2\/posts\/12"}],"collection":[{"href":"http:\/\/www.yarpee.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.yarpee.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.yarpee.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.yarpee.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=12"}],"version-history":[{"count":0,"href":"http:\/\/www.yarpee.cn\/index.php?rest_route=\/wp\/v2\/posts\/12\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.yarpee.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=12"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yarpee.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=12"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yarpee.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=12"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}