{"id":74960,"date":"2024-02-27T15:47:41","date_gmt":"2024-02-27T07:47:41","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=74960"},"modified":"2024-02-27T15:47:59","modified_gmt":"2024-02-27T07:47:59","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8c%e8%af%ad%e8%a8%80%e4%b8%ad%e5%ae%9e%e7%8e%b0%e5%a4%9a%e6%80%81","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/74960.html","title":{"rendered":"\u5982\u4f55\u5728C\u8bed\u8a00\u4e2d\u5b9e\u73b0\u591a\u6001"},"content":{"rendered":"

\"\u5982\u4f55\u5728C\u8bed\u8a00\u4e2d\u5b9e\u73b0\u591a\u6001\"<\/p>\n

### \u5982\u4f55\u5728C\u8bed\u8a00\u4e2d\u5b9e\u73b0\u591a\u6001<\/p>\n

\u5728C\u8bed\u8a00\u4e2d\u5b9e\u73b0\u591a\u6001\u4e3b\u8981\u4f9d\u8d56\u4e8e\u4e24\u4e2a\u6838\u5fc3\u6982\u5ff5\uff1a\u6307\u9488\u548c\u51fd\u6570\u6307\u9488<\/strong>\u3001\u7ed3\u6784\u4f53<\/strong>\u3002\u591a\u6001<\/strong>\u5728\u7f16\u7a0b\u8bed\u8a00\u4e2d\u662f\u4e00\u79cd\u80fd\u529b\uff0c\u5141\u8bb8\u4e0d\u540c\u7684\u6570\u636e\u7c7b\u578b\u4ee5\u76f8\u540c\u7684\u65b9\u5f0f\u5904\u7406\uff0c\u4ece\u800c\u5b9e\u73b0\u4ee3\u7801\u7684\u901a\u7528\u6027\u548c\u7075\u6d3b\u6027\u3002\u5728C\u8bed\u8a00\u4e2d\uff0c\u5c3d\u7ba1\u5b83\u4e0d\u76f4\u63a5\u652f\u6301\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u591a\u6001\u6027\uff0c\u4f46\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e00\u4e9b\u6280\u5de7\u6765\u6a21\u62df\u8fd9\u4e00\u7279\u6027\u3002\u5176\u4e2d\uff0c\u6307\u9488\u548c\u51fd\u6570\u6307\u9488<\/strong>\u7684\u4f7f\u7528\u662f\u5b9e\u73b0\u591a\u6001\u7684\u5173\u952e\uff0c\u5b83\u4eec\u5141\u8bb8\u6211\u4eec\u5728\u8fd0\u884c\u65f6\u51b3\u5b9a\u8c03\u7528\u54ea\u4e2a\u51fd\u6570\uff0c\u5b9e\u73b0\u4e86\u884c\u4e3a\u7684\u52a8\u6001\u7ed1\u5b9a\u3002\u800c\u7ed3\u6784\u4f53<\/strong>\u5219\u7528\u4e8e\u5c01\u88c5\u4e0d\u540c\u7684\u6570\u636e\u548c\u64cd\u4f5c\u6570\u636e\u7684\u51fd\u6570\u6307\u9488\uff0c\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u6211\u4eec\u53ef\u4ee5\u6a21\u62df\u51fa\u7c7b\u4f3c\u4e8e\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e2d\u7684\u5bf9\u8c61\u548c\u65b9\u6cd5\u3002<\/p>\n

#### \u4e00\u3001\u7406\u89e3\u591a\u6001\u6027<\/p>\n

\u591a\u6001\u6027\u662f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e2d\u7684\u4e00\u4e2a\u6838\u5fc3\u6982\u5ff5\uff0c\u5b83\u5141\u8bb8\u6211\u4eec\u4ee5\u7edf\u4e00\u7684\u63a5\u53e3\u5904\u7406\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e\u3002\u5c3d\u7ba1C\u8bed\u8a00\u662f\u4e00\u79cd\u8fc7\u7a0b\u5f0f\u7f16\u7a0b\u8bed\u8a00\uff0c\u5b83\u5e76\u4e0d\u76f4\u63a5\u652f\u6301\u9762\u5411\u5bf9\u8c61\u7684\u6982\u5ff5\uff0c\u5982\u7c7b\u548c\u7ee7\u627f\u7b49\uff0c\u4f46\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u67d0\u4e9b\u6280\u5de7\u5728C\u8bed\u8a00\u4e2d\u6a21\u62df\u51fa\u591a\u6001\u6027\u3002<\/p>\n

##### \u51fd\u6570\u6307\u9488\u548c\u7ed3\u6784\u4f53<\/p>\n

\u5728C\u8bed\u8a00\u4e2d\uff0c\u51fd\u6570\u6307\u9488\u5141\u8bb8\u6211\u4eec\u5728\u8fd0\u884c\u65f6\u51b3\u5b9a\u8c03\u7528\u54ea\u4e2a\u51fd\u6570\uff0c\u8fd9\u4e3a\u5b9e\u73b0\u591a\u6001\u6027\u63d0\u4f9b\u4e86\u53ef\u80fd\u3002\u901a\u8fc7\u5c06\u51fd\u6570\u6307\u9488\u5b58\u50a8\u5728\u7ed3\u6784\u4f53\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u5305\u542b\u4e0d\u540c\u51fd\u6570\u6307\u9488\u7684\u7ed3\u6784\u4f53\u5b9e\u4f8b\uff0c\u8fd9\u6837\uff0c\u4e0d\u540c\u7684\u5b9e\u4f8b\u53ef\u4ee5\u8868\u73b0\u51fa\u4e0d\u540c\u7684\u884c\u4e3a\uff0c\u4ece\u800c\u6a21\u62df\u51fa\u591a\u6001\u6027\u3002<\/p>\n

#### \u4e8c\u3001\u5b9e\u73b0\u591a\u6001\u7684\u6b65\u9aa4<\/p>\n

##### \u5b9a\u4e49\u57fa\u672c\u7ed3\u6784\u4f53<\/p>\n

\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u5b9a\u4e49\u4e00\u4e2a\u57fa\u672c\u7684\u7ed3\u6784\u4f53\uff0c\u5b83\u5c06\u4f5c\u4e3a\u4e0d\u540c\u7c7b\u578b\u6570\u636e\u7684\u57fa\u7840\u3002\u8fd9\u4e2a\u7ed3\u6784\u4f53\u5305\u542b\u4e00\u4e2a\u6216\u591a\u4e2a\u51fd\u6570\u6307\u9488\uff0c\u8fd9\u4e9b\u51fd\u6570\u6307\u9488\u6307\u5411\u5b9e\u73b0\u7279\u5b9a\u64cd\u4f5c\u7684\u51fd\u6570\u3002<\/p>\n

“`c<\/p>\n

typedef struct {<\/p>\n

void (*print)(void*);<\/p>\n

} BaseType;<\/p>\n

“`<\/p>\n

##### \u5b9e\u73b0\u5177\u4f53\u7c7b\u578b<\/p>\n

\u63a5\u4e0b\u6765\uff0c\u5bf9\u4e8e\u6bcf\u4e00\u79cd\u9700\u8981\u6a21\u62df\u7684\u7c7b\u578b\uff0c\u6211\u4eec\u5b9a\u4e49\u4e00\u4e2a\u7ed3\u6784\u4f53\uff0c\u5b83\u9996\u90e8\u5305\u542b\u57fa\u672c\u7c7b\u578b\u7684\u7ed3\u6784\u4f53\uff0c\u4ee5\u6b64\u5b9e\u73b0\u7c7b\u4f3c\u4e8e\u7ee7\u627f\u7684\u6548\u679c\u3002\u7136\u540e\uff0c\u4e3a\u6bcf\u4e2a\u5177\u4f53\u7c7b\u578b\u5b9e\u73b0\u76f8\u5e94\u7684\u51fd\u6570\u3002<\/p>\n

“`c<\/p>\n

typedef struct {<\/p>\n

BaseType base;<\/p>\n

\/\/ \u5176\u4ed6\u6210\u5458\u53d8\u91cf<\/p>\n

} SpecificType1;<\/p>\n

void SpecificType1_print(void* self) {<\/p>\n

\/\/ \u5b9e\u73b0\u6253\u5370\u64cd\u4f5c<\/p>\n

}<\/p>\n

“`<\/p>\n

##### \u4f7f\u7528\u591a\u6001<\/p>\n

\u5728\u5b9e\u73b0\u4e86\u5177\u4f53\u7c7b\u578b\u548c\u76f8\u5e94\u7684\u51fd\u6570\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u57fa\u672c\u7c7b\u578b\u7684\u6307\u9488\u6765\u8c03\u7528\u8fd9\u4e9b\u51fd\u6570\uff0c\u5b9e\u73b0\u591a\u6001\u6027\u3002<\/p>\n

“`c<\/p>\n

void performPrint(BaseType* base) {<\/p>\n

base->print(base);<\/p>\n

}<\/p>\n

BaseType* createSpecificType1() {<\/p>\n

SpecificType1* obj = malloc(sizeof(SpecificType1));<\/p>\n

obj->base.print = SpecificType1_print;<\/p>\n

return (BaseType*)obj;<\/p>\n

}<\/p>\n

“`<\/p>\n

#### \u4e09\u3001\u591a\u6001\u7684\u5e94\u7528\u573a\u666f<\/p>\n

##### \u63d0\u9ad8\u4ee3\u7801\u7684\u590d\u7528\u6027<\/p>\n

\u901a\u8fc7\u591a\u6001\uff0c\u6211\u4eec\u53ef\u4ee5\u7f16\u5199\u66f4\u52a0\u901a\u7528\u7684\u4ee3\u7801\uff0c\u63d0\u9ad8\u4ee3\u7801\u7684\u590d\u7528\u6027\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u7f16\u5199\u4e00\u4e2a\u901a\u7528\u7684\u51fd\u6570\uff0c\u5b83\u53ef\u4ee5\u5904\u7406\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e\uff0c\u800c\u4e0d\u9700\u8981\u4e3a\u6bcf\u79cd\u6570\u636e\u7c7b\u578b\u7f16\u5199\u4e13\u95e8\u7684\u4ee3\u7801\u3002<\/p>\n

##### \u7b80\u5316\u4ee3\u7801\u7ed3\u6784<\/p>\n

\u591a\u6001\u8fd8\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u7b80\u5316\u4ee3\u7801\u7ed3\u6784\uff0c\u4f7f\u4ee3\u7801\u66f4\u52a0\u6613\u4e8e\u7406\u89e3\u548c\u7ef4\u62a4\u3002\u901a\u8fc7\u4f7f\u7528\u591a\u6001\uff0c\u6211\u4eec\u53ef\u4ee5\u51cf\u5c11\u4ee3\u7801\u4e2d\u7684\u6761\u4ef6\u5224\u65ad\uff0c\u4f7f\u4ee3\u7801\u903b\u8f91\u66f4\u52a0\u6e05\u6670\u3002<\/p>\n

#### \u56db\u3001\u603b\u7ed3<\/p>\n

\u867d\u7136C\u8bed\u8a00\u4e0d\u76f4\u63a5\u652f\u6301\u9762\u5411\u5bf9\u8c61\u7684\u591a\u6001\u6027\uff0c\u4f46\u901a\u8fc7\u6307\u9488\u3001\u51fd\u6570\u6307\u9488\u548c\u7ed3\u6784\u4f53\u7684\u5de7\u5999\u4f7f\u7528\uff0c\u6211\u4eec\u4f9d\u7136\u53ef\u4ee5\u5728C\u8bed\u8a00\u4e2d\u5b9e\u73b0\u7c7b\u4f3c\u7684\u529f\u80fd\u3002\u8fd9\u79cd\u6280\u5de7\u7684\u5e94\u7528\u4e0d\u4ec5\u589e\u52a0\u4e86C\u8bed\u8a00\u7f16\u7a0b\u7684\u7075\u6d3b\u6027\uff0c\u4e5f\u4e3a\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u8bed\u8a00\u7684\u5b66\u4e60\u548c\u7406\u89e3\u63d0\u4f9b\u4e86\u4e00\u4e2a\u6709\u4ef7\u503c\u7684\u89c6\u89d2\u3002\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u6839\u636e\u9879\u76ee\u7684\u5177\u4f53\u9700\u6c42\u5408\u7406\u5e94\u7528\u8fd9\u4e9b\u6280\u5de7\uff0c\u53ef\u4ee5\u6709\u6548\u63d0\u5347\u4ee3\u7801\u7684\u8d28\u91cf\u548c\u5f00\u53d1\u6548\u7387\u3002<\/p>\n

\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n

\u4ec0\u4e48\u662fC\u8bed\u8a00\u4e2d\u7684\u591a\u6001\u6027\uff1f<\/strong>
\n\u591a\u6001\u6027\u662f\u4e00\u79cd\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u6982\u5ff5\uff0c\u5141\u8bb8\u4e0d\u540c\u5bf9\u8c61\u5bf9\u76f8\u540c\u6d88\u606f\u505a\u51fa\u4e0d\u540c\u54cd\u5e94\u7684\u7279\u6027\u3002\u5728C\u8bed\u8a00\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u51fd\u6570\u6307\u9488\u548c\u7ed3\u6784\u4f53\u6765\u5b9e\u73b0\u591a\u6001\u6027\u3002<\/p>\n

\u5982\u4f55\u5728C\u8bed\u8a00\u4e2d\u4f7f\u7528\u51fd\u6570\u6307\u9488\u5b9e\u73b0\u591a\u6001\u6027\uff1f<\/strong>
\n\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2a\u7ed3\u6784\u4f53\uff0c\u5176\u4e2d\u5305\u542b\u51fd\u6570\u6307\u9488\u4ee5\u53ca\u5176\u4ed6\u53d8\u91cf\uff0c\u7136\u540e\u5b9a\u4e49\u591a\u4e2a\u5b9e\u73b0\u8be5\u7ed3\u6784\u4f53\u7684\u5177\u4f53\u5bf9\u8c61\u3002\u901a\u8fc7\u8c03\u7528\u7ed3\u6784\u4f53\u4e2d\u7684\u51fd\u6570\u6307\u9488\uff0c\u53ef\u4ee5\u5b9e\u73b0\u4e0d\u540c\u5bf9\u8c61\u5bf9\u76f8\u540c\u6d88\u606f\u7684\u4e0d\u540c\u54cd\u5e94\uff0c\u8fd9\u5c31\u662fC\u8bed\u8a00\u4e2d\u7684\u591a\u6001\u6027\u3002<\/p>\n

C\u8bed\u8a00\u4e2d\u5982\u4f55\u901a\u8fc7\u7ed3\u6784\u4f53\u5b9e\u73b0\u591a\u6001\u6027\uff1f<\/strong>
\n\u5728C\u8bed\u8a00\u4e2d\uff0c\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2a\u57fa\u7c7b\u7ed3\u6784\u4f53\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e2a\u51fd\u6570\u6307\u9488\u548c\u5176\u4ed6\u9700\u8981\u7684\u53d8\u91cf\u3002\u7136\u540e\u901a\u8fc7\u5b9a\u4e49\u591a\u4e2a\u7ee7\u627f\u81ea\u57fa\u7c7b\u7ed3\u6784\u4f53\u7684\u5b50\u7c7b\u7ed3\u6784\u4f53\uff0c\u5e76\u4e3a\u51fd\u6570\u6307\u9488\u8d4b\u4e88\u4e0d\u540c\u7684\u51fd\u6570\u5b9e\u73b0\uff0c\u5b9e\u73b0\u4e0d\u540c\u5bf9\u8c61\u4e4b\u95f4\u5bf9\u76f8\u540c\u6d88\u606f\u7684\u4e0d\u540c\u54cd\u5e94\uff0c\u4ece\u800c\u8fbe\u5230\u591a\u6001\u6027\u7684\u6548\u679c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"### \u5982\u4f55\u5728C\u8bed\u8a00\u4e2d\u5b9e\u73b0\u591a\u6001 \u5728C\u8bed\u8a00\u4e2d\u5b9e\u73b0\u591a\u6001\u4e3b\u8981\u4f9d\u8d56\u4e8e\u4e24\u4e2a\u6838\u5fc3\u6982\u5ff5\uff1a\u6307\u9488\u548c\u51fd\u6570\u6307\u9488\u3001\u7ed3\u6784\u4f53\u3002\u591a\u6001\u5728\u7f16\u7a0b\u8bed […]","protected":false},"author":1,"featured_media":74963,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/74960"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=74960"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/74960\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/74963"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=74960"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=74960"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=74960"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}