{"id":2721,"date":"2015-07-21T10:24:06","date_gmt":"2015-07-21T02:24:06","guid":{"rendered":"http:\/\/blog.qdac.cc\/?p=2721"},"modified":"2015-07-21T10:24:06","modified_gmt":"2015-07-21T02:24:06","slug":"%e6%95%99%e7%a8%8b-c-%e7%9a%84%e7%a8%8b%e5%ba%8f%e7%bb%93%e6%9e%84","status":"publish","type":"post","link":"https:\/\/blog.qdac.cc\/?p=2721","title":{"rendered":"[\u6559\u7a0b] C++ \u7684\u7a0b\u5e8f\u7ed3\u6784"},"content":{"rendered":"<p>1\u3001\u51fd\u6570<\/p>\n<p>\u51fd\u6570\u662f\u4eba\u4e3a\u7684\u5c06\u4e00\u6bb5\u5177\u6709\u67d0\u4e00\u529f\u80fd\u7684\u4ee3\u7801\u6309\u7279\u5b9a\u7684\u683c\u5f0f\u7ec4\u7ec7\u5728\u4e00\u8d77\uff0c\u4ee5\u4fbf\u5728\u7a0b\u5e8f\u7684\u5176\u5b83\u5730\u65b9\u968f\u65f6\u8c03\u7528\u7684\u4e00\u5757\u4ee3\u7801\u7684\u5b9e\u4f53\u3002\u5728 C\/C++ \u4e2d\uff0c\u5b83\u7684\u683c\u5f0f\u4e3a\uff1a<\/p>\n<p>[\u4fee\u9970\u7b26] \u8fd4\u56de\u503c\u7c7b\u578b [\u4fee\u9970\u7b26] \u51fd\u6570\u540d([\u53c2\u6570\u5217\u8868])[\u4fee\u9970\u7b26]<\/p>\n<p>{<\/p>\n<p>[\u51fd\u6570\u5b9e\u73b0]<\/p>\n<p>}<\/p>\n<p>\u521d\u5b66\u65f6\uff0c\u6211\u4eec\u6682\u65f6\u5148\u4e0d\u8003\u8651\u5404\u79cd\u4fee\u9970\u7b26\uff0c\u53ea\u5173\u7cfb\u6838\u5fc3\u7684\u90e8\u5206\uff1a<\/p>\n<ul>\n<li>\u8fd4\u56de\u503c\u7c7b\u578b\uff1a\u7528\u4e8e\u7ed9\u8c03\u7528\u8005\u8fd4\u56de\u51fd\u6570\u6267\u884c\u7684\u7ed3\u679c\uff0c\u5982\u679c\u4e0d\u8fd4\u56de\u7ed3\u679c\uff0c\u5219\u8fd4\u56de\u503c\u7c7b\u578b\u8bbe\u7f6e\u4e3a void<\/li>\n<li>\u51fd\u6570\u540d\uff1a\u51fd\u6570\u540d\u662f\u4e00\u4e2a\u6807\u5fd7\u7b26\uff0c\u8981\u6c42\u5fc5\u9700\u4ee5\u975e\u6570\u5b57\u548c\u8fd0\u7b97\u7b26\u7b49\u4fdd\u7559\u7684\u5185\u5bb9\uff0c\u4e5f\u4e0d\u80fd\u5305\u542b\u7a7a\u683c\uff0c\u4e00\u822c\u662f_\u6216\u5b57\u6bcd\u5f00\u5934\uff0c\u6570\u5b57\u4e0d\u80fd\u6253\u5934\uff0c\u4f46\u53ef\u4ee5\u5728\u540e\u9762\u3002\u66f4\u65b0\u4e00\u4e9b\u7684IDE\u4e5f\u652f\u6301\u6c49\u5b57\u7b49\u547d\u540d\u53d8\u91cf\u3002<\/li>\n<li>\u53c2\u6570\u5217\u8868\uff1a\u51fd\u6570\u7684\u53c2\u6570\u53ef\u4ee5\u6ca1\u6709\uff0c\u4e5f\u53ef\u4ee5\u6709\u591a\u4e2a\uff0c\u591a\u4e2a\u53c2\u6570\u95f4\u4ee5 \u201c,\u201d \u5206\u9694\u3002\u5355\u4e2a\u53c2\u6570\u7684\u58f0\u660e\u683c\u5f0f\u662f\uff1a<br \/>\n[\u4fee\u9970\u7b26] \u53c2\u6570\u7c7b\u578b \u53c2\u6570\u540d<\/li>\n<\/ul>\n<p>2\u3001\u4efb\u4f55\u4e00\u4e2a\u7a0b\u5e8f\u90fd\u6709\u4e00\u4e2a\u5165\u53e3\u51fd\u6570\uff0c\u5b83\u4ee3\u8868\u4f60\u7684\u5e38\u89c4\u4ee3\u7801\u6267\u884c\u7684\u8d77\u59cb\u4f4d\u7f6e\u3002\u4e00\u822c\u5728C\/C++ \u7684\u5165\u53e3\u51fd\u6570\u540d\u4e3a main\uff0c\u4f46\u662f\u4f60\u4f1a\u770b\u5230\uff1a<\/p>\n<ul>\n<li>\u5728 Windows \u4e0b\u7684\u7a0b\u5e8f\u91cc\uff0c\u8bb8\u591a C++ \u5f00\u53d1\u73af\u5883\u7684\u7528\u7684\u662f WinMain\uff0c\u5728\u52a8\u6001\u94fe\u63a5\u5e93\u91cc\u7684\u8bdd\uff0c\u6309 Windows \u7684\u7ea6\u5b9a\u662f DLLEntry\uff0c\u6309\u7167 Windows \u52a8\u6001\u94fe\u63a5\u5e93\u7684\u89c4\u5219\u8d70\u3002<\/li>\n<li>\u7531\u4e8e C\/C++ \u652f\u6301\u5b8f\u5b9a\u4e49\uff0c\u4e00\u4e9b\u7f16\u8bd1\u5668\u4f1a\u91cd\u5b9a\u4e49main\u51fd\u6570\u7684\u540d\u79f0\uff0c\u6240\u4ee5\u4f60\u4f1a\u89c1\u5230 _tmain \u4e00\u7c7b\u7684\u5b9a\u4e49\uff0c\u4e0d\u8981\u5947\u602a\uff0c\u5b83\u53ea\u662f\u4e00\u4e2a\u522b\u540d\u3002<\/li>\n<li>main \u51fd\u6570\u7684\u58f0\u660e\u5f62\u5f0f\u662f\u4e0b\u9762\u7684\u683c\u5f0f\uff1a<br \/>\n[void|int] main([void|int argc,char *argv[] ])<br \/>\n\u5982\u679c\u4f60\u7684\u7a0b\u5e8f\u8fd4\u56de\u503c\u4f60\u4e0d\u5173\u5fc3\u7684\u8bdd\uff0c\u8fd4\u56de\u503c\u90e8\u5206\u53ef\u4ee5\u58f0\u660e\u4e3a void \u3002\u5982\u679c\u4f60\u8981\u8fd4\u56de\u4e00\u4e2a\u9519\u8bef\u4ee3\u7801\u7684\u8bdd\uff0c\u4f60\u8fd4\u56de\u503c\u7c7b\u578b\u5e94\u4e3a int\u3002<br \/>\n\u5982\u679c\u4f60\u7684\u7a0b\u5e8f\u4e0d\u5173\u5fc3\u901a\u8fc7\u547d\u4ee4\u884c\u6216\u5feb\u6377\u65b9\u5f0f\u4f20\u9012\u8fc7\u6765\u7684\u53c2\u6570\u7684\u8bdd\uff0cmain \u540e\u9762\u62ec\u53f7\u91cc\u7684\u53c2\u6570\u53ef\u4ee5\u7701\u7565\uff0c\u6216\u8005\u5199\u4e3a void\u3002\u5982\u679c\u4f60\u5173\u5fc3\u7684\u8bdd\uff0c\u5c31\u5fc5\u9700\u4f7f\u7528\u4e24\u4e2a\u53c2\u6570\u7684\u7248\u672c\uff1a\u7b2c\u4e00\u4e2a\u53c2\u6570\u4e3a\u4f20\u9012\u8fc7\u6765\u7684\u53c2\u6570\u6570\u91cf\uff0c\u7b2c\u4e8c\u4e2a\u53c2\u6570\u4e3a\u4f20\u9012\u8fdb\u6765\u7684\u53c2\u6570\u5b57\u7b26\u4e32\u5217\u8868\uff0c\u53ef\u4ee5\u5199\u4e3a char *argv[] \u6216 char **argv\u3002<\/li>\n<\/ul>\n<p>3\u3001C\/C++ \u6709\u4e00\u4e2a\u5f3a\u5927\u7684\u9884\u5904\u7406\u7cfb\u7edf\uff0c\u53ef\u4ee5\u652f\u6301\u5b8f\u5b9a\u4e49\u53ca\u8bb8\u591a\u7f16\u8bd1\u6307\u4ee4\u7684\u63a7\u5236\uff0c\u6211\u4eec\u5e38\u89c1\u7684\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u6587\u4ef6\u5305\u542b\u6307\u4ee4 #include \u7528\u4e8e\u5305\u542b\u53e6\u4e00\u4e2a\u6587\u4ef6\u7684\u4ee3\u7801<br \/>\n#include &lt;\u6587\u4ef6\u540d&gt;<br \/>\n#include &#8220;\u6587\u4ef6\u540d&#8221;<br \/>\n\u4e24\u8005\u7684\u533a\u522b\u5728\u4e8e\u641c\u7d22\u8def\u5f84\u7684\u8303\u56f4\u4e0d\u540c\uff0c\u524d\u8005\u53ea\u5728\u7cfb\u7edf\u548c\u5de5\u7a0b\u8bbe\u5b9a\u7684\u641c\u7d22\u76ee\u5f55\u4e0b\u8fdb\u884c\u641c\u7d22\uff0c\u800c\u540e\u8005\u5219\u662f\u5728\u5f53\u524d\u76ee\u5f55\u548c\u7cfb\u7edf\u53ca\u5de5\u7a0b\u8bbe\u5b9a\u7684\u76ee\u5f55\u4e0b\u8fdb\u884c\u641c\u7d22\u6587\u4ef6\u3002<\/li>\n<li>\u6761\u4ef6\u7f16\u8bd1\u6307\u4ee4\u7528\u4e8e\u5728\u7b26\u5408\u7279\u5b9a\u6761\u4ef6\u65f6\u7f16\u8bd1\u9650\u5b9a\u8303\u56f4\u5185\u7684\u4ee3\u7801<br \/>\n#ifdef XXXX<br \/>\n<em>\u5982\u679cXXXX \u5b9a\u4e49\u7684\u8bdd\uff0c\u5c31\u7f16\u8bd1\u8fd9\u90e8\u5206\u4ee3\u7801<\/em><br \/>\n#else<br \/>\n<em>\u5982\u679c\u4e0d\u6210\u7acb\uff0c\u5c31\u7f16\u8bd1\u8fd9\u90e8\u5206\u4ee3\u7801<\/em><br \/>\n#endif<\/li>\n<li>\u5b8f\u5b9a\u4e49\u6307\u4ee4 #define \u7528\u4e8e\u5b9a\u4e49\u4e00\u4e2a\u5b8f\u66ff\u6362\uff0c\u4ee5\u7b80\u5316\u4ee3\u7801<br \/>\n#define \u5b8f\u540d\u79f0 \u5b8f\u5185\u5bb9<br \/>\n\u5982<br \/>\n#define max(a,b) ((a)&gt;(b))?(a):(b))<br \/>\n\u5c31\u5b9a\u4e49\u4e86\u4e00\u4e2a max \u64cd\u4f5c\uff0c\u6765\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53d6\u5176\u4e2d\u6700\u5927\u7684\u90a3\u4e2a\u505a\u4e3a\u7ed3\u679c\u3002\u5199\u5b8f\u5b9a\u4e49\u65f6\uff0c\u4e00\u5b9a\u8981\u6ce8\u610f\u8868\u8fbe\u5f0f\u7684\u53c2\u6570\u5c3d\u91cf\u7528\u62ec\u53f7\u5305\u62ec\u8d77\u6765\uff0c\u4ee5\u4fdd\u8bc1\u8868\u8fbe\u5f0f\u4e0d\u4f1a\u88ab\u8bef\u7528<\/li>\n<li>\u590d\u6742\u8bb0\u5f55\u6216\u7c7b\u6210\u5458\u5bf9\u9f50\u6307\u4ee4 #pragma pack(push,1|2|4|8) \/#pragma pack(pop) \u6216#pragma pack push -b\u7b49\uff0c\u54b1\u4eec\u521a\u5f00\u59cb\u5b66\u4e60\uff0c\u6682\u65f6\u8fd8\u7528\u4e0d\u5230\u8003\u8651\u8fd9\u5757\uff0c\u4e86\u89e3\u5c31\u597d\u3002<\/li>\n<\/ul>\n<p>4\u3001\u6ce8\u91ca<\/p>\n<p>C\/C++\u7684\u6ce8\u91ca\u6709\u4e24\u79cd\uff0c\u4e00\u79cd\u662f\u884c\u6ce8\u91ca\uff0c\u4e00\u79cd\u662f\u5757\u6ce8\u91ca\u3002<\/p>\n<ul>\n<li>\u884c\u6ce8\u91ca\u7b26 \/\/<br \/>\n\u4ece\u53cc\u53cd\u659c\u7ebf\u5f00\u59cb\uff0c\u5f53\u524d\u884c\u540e\u9762\u7684\u5185\u5bb9\u4f1a\u88ab\u8ba4\u4e3a\u662f\u6ce8\u91ca\uff0c\u5982<br \/>\nabc=1;\/\/\u8fd9\u662f\u6ce8\u91ca<\/li>\n<li>\u5757\u6ce8\u91ca\u7b26<br \/>\n\u4ee5 \/* \u5f00\u59cb\uff0c\u4ee5 *\/ \u7ed3\u675f\uff0c\u4e2d\u95f4\u7684\u5185\u5bb9\u88ab\u8ba4\u4e3a\u662f\u6ce8\u91ca\u3002\u5982<br \/>\nabc=1;<br \/>\n\/*<br \/>\n\u8fd9\u662f\u6ce8\u91ca\u884c1<br \/>\n\u8fd9\u662f\u6ce8\u91ca\u884c2<br \/>\n*\/<\/li>\n<\/ul>\n<p>\u6ce8\u610f\u4e0d\u8981\u5728\u5757\u6ce8\u91ca\u4e2d\u5305\u542b *\/ \uff0cC \/ C++ \u7f16\u8bd1\u5668\u9047\u5230\u5b83\u5c31\u4f1a\u8ba4\u4e3a\u5757\u6ce8\u91ca\u7ed3\u675f\u4e86\uff0c\u6240\u4ee5\u5c31\u4f1a\u7f16\u8bd1\u51fa\u9519\u3002<\/p>\n<p>5\u3001\u547d\u540d\u7a7a\u95f4<\/p>\n<p>\u4e3a\u4e86\u5e94\u4ed8\u65e5\u76ca\u589e\u5927\u7684\u4ee3\u7801\u91cf\u548c\u56e2\u961f\u5f00\u53d1\u53ef\u80fd\u4f1a\u5f15\u8d77\u7684\u547d\u540d\u51b2\u7a81\u95ee\u9898\uff0c\u5f15\u5165\u4e86\u547d\u540d\u7a7a\u95f4\u6765\u4e88\u4ee5\u533a\u5206\uff0c\u683c\u5f0f\u4e3a\uff1a<br \/>\nnamespace \u547d\u540d\u7a7a\u95f4\u540d<\/p>\n<p>{<\/p>\n<p>\u51fd\u6570\u6216\u53d8\u91cf\u5b9a\u4e49<\/p>\n<p>}<\/p>\n<p>\u5728\u4f7f\u7528\u65f6\uff0c\u53ef\u4ee5\u76f4\u63a5\u7528 \u547d\u540d\u7a7a\u95f4::\u51fd\u6570\u6216\u53d8\u91cf\u540d \u6765\u8bbf\u95ee\u5176\u547d\u540d\u7a7a\u95f4\u5185\u7684\u51fd\u6570\u6216\u53d8\u91cf\u3002\u5982\u679c\u4e0d\u60f3\u5199\u547d\u540d\u7a7a\u95f4\uff0c\u4e14\u51fd\u6570\u6216\u53d8\u91cf\u540d\u5728\u5f53\u524d\u4ee3\u7801\u5f15\u7528\u7684\u5355\u5143\u4e4b\u5185\u6ca1\u6709\u51b2\u7a81\uff0c\u53ef\u4ee5\u76f4\u63a5\u52a0\u5165\u4e0b\u9762\u7684\u4ee3\u7801\uff1a<\/p>\n<p>using namespace \u547d\u540d\u7a7a\u95f4\u540d;<\/p>\n<p>\u7136\u540e\u5c31\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u5176\u547d\u540d\u7a7a\u95f4\u5185\u7684\u51fd\u6570\u6216\u53d8\u91cf\u4e86\u3002<\/p>\n<p>6\u3001\u53d8\u91cf\u7684\u58f0\u660e<\/p>\n<p>\u53d8\u91cf\u7684\u58f0\u660e\u683c\u5f0f\u548c\u524d\u9762\u53c2\u6570\u4e00\u6837\uff0c\u683c\u5f0f\u4e5f\u662f\uff1a<br \/>\n[\u4fee\u9970\u7b26] \u53d8\u91cf\u7c7b\u578b [\u4fee\u9970\u7b26] \u53d8\u91cf\u540d;<\/p>\n<p>\u591a\u4e2a\u53d8\u91cf\u58f0\u660e\u53ef\u4ee5\u4ee5 \u201c,\u201d \u5206\u9694\u3002<\/p>\n<p>7\u3001\u8fd0\u7b97\u7b26<\/p>\n<p>\u5305\u62ec\u8d4b\u503c\u3001\u7b97\u672f\u8fd0\u7b97\u7b26\u3001\u903b\u8f91\u8fd0\u7b97\u7b26\u548c\u4f4d\u8fd0\u7b97\u7b26\uff0c\u5177\u4f53\u7684\u5185\u5bb9\u53ca\u7528\u6cd5\u53c2\u8003\u4e66\u91cc\u7684\u9644\u5f55\uff0c\u8fd9\u4e2a\u8981\u80cc\u4e0b\u6765\u7684\u3002<\/p>\n<p>8\u3001\u5173\u4e8e iostream \u4e86\u89e3\u5373\u53ef\uff0c\u4e0d\u5199\u547d\u4ee4\u884c\u7a0b\u5e8f\u5f88\u5c11\u7528\u5230\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1\u3001\u51fd\u6570 \u51fd\u6570\u662f\u4eba\u4e3a\u7684\u5c06\u4e00\u6bb5\u5177\u6709\u67d0\u4e00\u529f\u80fd [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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