{"id":59703,"date":"2024-10-13T00:06:16","date_gmt":"2024-10-12T16:06:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/59703\/"},"modified":"2024-10-13T00:06:16","modified_gmt":"2024-10-12T16:06:16","slug":"c%e8%aa%9e%e8%a8%80%e5%8f%8d%e5%b0%84%e6%8a%80%e8%a1%93%ef%bc%9a%e5%af%a6%e7%8f%be%e8%ae%80%e5%8f%96%e6%95%b8%e6%93%9a%e5%ba%ab%e5%ad%97%e6%ae%b5%e6%93%8d%e4%bd%9c-c%e5%8f%8d%e5%b0%84%e8%ae%80","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/59703\/","title":{"rendered":"C\u8a9e\u8a00\u53cd\u5c04\u6280\u8853\uff1a\u5be6\u73fe\u8b80\u53d6\u6578\u64da\u5eab\u5b57\u6bb5\u64cd\u4f5c (c\u53cd\u5c04\u8b80\u53d6\u6578\u64da\u5eab\u5b57\u6bb5)"},"content":{"rendered":"<h1 id=\"c%e8%aa%9e%e8%a8%80%e5%8f%8d%e5%b0%84%e6%8a%80%e8%a1%93%ef%bc%9a%e5%af%a6%e7%8f%be%e8%ae%80%e5%8f%96%e6%95%b8%e6%93%9a%e5%ba%ab%e5%ad%97%e6%ae%b5%e6%93%8d%e4%bd%9c-CTAudmxTcv\">C\u8a9e\u8a00\u53cd\u5c04\u6280\u8853\uff1a\u5be6\u73fe\u8b80\u53d6\u6578\u64da\u5eab\u5b57\u6bb5\u64cd\u4f5c<\/h1>\n<p>\u5728\u73fe\u4ee3\u8edf\u9ad4\u958b\u767c\u4e2d\uff0c\u53cd\u5c04\u6280\u8853\u662f\u4e00\u500b\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5c24\u5176\u662f\u5728\u52d5\u614b\u8a9e\u8a00\u4e2d\u66f4\u70ba\u5e38\u898b\u3002\u7136\u800c\uff0cC\u8a9e\u8a00\u4f5c\u70ba\u4e00\u7a2e\u975c\u614b\u985e\u578b\u7684\u7de8\u7a0b\u8a9e\u8a00\uff0c\u4e26\u4e0d\u76f4\u63a5\u652f\u6301\u53cd\u5c04\uff0c\u4f46\u6211\u5011\u53ef\u4ee5\u901a\u904e\u4e00\u4e9b\u6280\u5de7\u4f86\u5be6\u73fe\u985e\u4f3c\u7684\u529f\u80fd\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728C\u8a9e\u8a00\u4e2d\u4f7f\u7528\u53cd\u5c04\u6280\u8853\u4f86\u8b80\u53d6\u6578\u64da\u5eab\u5b57\u6bb5\u3002<\/p>\n<h2 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id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e5%8f%8d%e5%b0%84%e6%8a%80%e8%a1%93%ef%bc%9f-CTAudmxTcv\">\u70ba\u4ec0\u9ebc\u9700\u8981\u53cd\u5c04\u6280\u8853\uff1f<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u64cd\u4f5c\u4e2d\uff0c\u53cd\u5c04\u6280\u8853\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u52d5\u614b\u5730\u8b80\u53d6\u548c\u64cd\u4f5c\u6578\u64da\u5eab\u5b57\u6bb5\u3002\u9019\u5c0d\u65bc\u9700\u8981\u8655\u7406\u4e0d\u78ba\u5b9a\u7d50\u69cb\u7684\u6578\u64da\u6642\u7279\u5225\u6709\u7528\uff0c\u4f8b\u5982\u5728ORM\uff08\u5c0d\u8c61\u95dc\u4fc2\u6620\u5c04\uff09\u6846\u67b6\u4e2d\u3002\u901a\u904e\u53cd\u5c04\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6e1b\u5c11\u786c\u7de8\u78bc\u7684\u9700\u6c42\uff0c\u63d0\u9ad8\u4ee3\u78bc\u7684\u9748\u6d3b\u6027\u548c\u53ef\u7dad\u8b77\u6027\u3002<\/p>\n<h2 id=\"%e5%9c%a8c%e8%aa%9e%e8%a8%80%e4%b8%ad%e5%af%a6%e7%8f%be%e5%8f%8d%e5%b0%84%e6%8a%80%e8%a1%93-CTAudmxTcv\">\u5728C\u8a9e\u8a00\u4e2d\u5be6\u73fe\u53cd\u5c04\u6280\u8853<\/h2>\n<p>\u96d6\u7136C\u8a9e\u8a00\u4e0d\u652f\u6301\u53cd\u5c04\uff0c\u4f46\u6211\u5011\u53ef\u4ee5\u901a\u904e\u7d50\u69cb\u9ad4\u548c\u51fd\u6578\u6307\u91dd\u4f86\u6a21\u64ec\u9019\u4e00\u529f\u80fd\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528\u7d50\u69cb\u9ad4\u4f86\u8868\u793a\u6578\u64da\u5eab\u5b57\u6bb5\uff0c\u4e26\u901a\u904e\u51fd\u6578\u6307\u91dd\u4f86\u8b80\u53d6\u9019\u4e9b\u5b57\u6bb5\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a2%bc-CTAudmxTcv\">\u793a\u4f8b\u4ee3\u78bc<\/h3>\n<pre><code>\n#include &lt;stdio.h&gt;\n#include &lt;string.h&gt;\n\ntypedef struct {\n    char name[50];\n    int age;\n} Person;\n\nvoid printField(void *obj, const char *fieldName) {\n    Person *person = (Person *)obj;\n    if (strcmp(fieldName, \"name\") == 0) {\n        printf(\"Name: %sn\", person-&gt;name);\n    } else if (strcmp(fieldName, \"age\") == 0) {\n        printf(\"Age: %dn\", person-&gt;age);\n    } else {\n        printf(\"Field not found.n\");\n    }\n}\n\nint main() {\n    Person p;\n    strcpy(p.name, \"Alice\");\n    p.age = 30;\n\n    printField(&amp;p, \"name\");\n    printField(&amp;p, \"age\");\n\n    return 0;\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b\u540d\u70ba <code>Person<\/code> \u7684\u7d50\u69cb\u9ad4\uff0c\u4e26\u5275\u5efa\u4e86\u4e00\u500b\u51fd\u6578 <code>printField<\/code>\uff0c\u8a72\u51fd\u6578\u6839\u64da\u5b57\u6bb5\u540d\u7a31\u52d5\u614b\u5730\u8b80\u53d6\u4e26\u6253\u5370\u5b57\u6bb5\u503c\u3002\u9019\u7a2e\u65b9\u6cd5\u96d6\u7136\u4e0d\u662f\u771f\u6b63\u7684\u53cd\u5c04\uff0c\u4f46\u5b83\u63d0\u4f9b\u4e86\u4e00\u7a2e\u9748\u6d3b\u7684\u65b9\u5f0f\u4f86\u8655\u7406\u6578\u64da\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e5%8f%8d%e5%b0%84%e6%8a%80%e8%a1%93%e8%ae%80%e5%8f%96%e6%95%b8%e6%93%9a%e5%ba%ab%e5%ad%97%e6%ae%b5-CTAudmxTcv\">\u4f7f\u7528\u53cd\u5c04\u6280\u8853\u8b80\u53d6\u6578\u64da\u5eab\u5b57\u6bb5<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u5c07\u9019\u7a2e\u6280\u8853\u64f4\u5c55\u5230\u6578\u64da\u5eab\u64cd\u4f5c\u4e2d\u3002\u4f8b\u5982\uff0c\u901a\u904e\u67e5\u8a62\u6578\u64da\u5eab\u7372\u53d6\u5b57\u6bb5\u540d\u7a31\uff0c\u7136\u5f8c\u4f7f\u7528\u985e\u4f3c\u4e0a\u9762\u7684\u51fd\u6578\u4f86\u52d5\u614b\u8b80\u53d6\u5b57\u6bb5\u503c\u3002\u9019\u6a23\u53ef\u4ee5\u4f7f\u4ee3\u78bc\u66f4\u52a0\u901a\u7528\uff0c\u9069\u61c9\u4e0d\u540c\u7684\u6578\u64da\u7d50\u69cb\u3002<\/p>\n<h3 id=\"%e6%93%b4%e5%b1%95%e7%a4%ba%e4%be%8b-CTAudmxTcv\">\u64f4\u5c55\u793a\u4f8b<\/h3>\n<pre><code>\nvoid readFromDatabase(const char *query) {\n    \/\/ \u5047\u8a2d\u9019\u88e1\u6709\u4ee3\u78bc\u5f9e\u6578\u64da\u5eab\u4e2d\u57f7\u884c\u67e5\u8a62\u4e26\u7372\u53d6\u7d50\u679c\n    \/\/ \u7136\u5f8c\u6839\u64da\u7d50\u679c\u52d5\u614b\u8abf\u7528 printField \u51fd\u6578\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u64f4\u5c55\u793a\u4f8b\u4e2d\uff0c<code>readFromDatabase<\/code> \u51fd\u6578\u53ef\u4ee5\u6839\u64da\u67e5\u8a62\u7d50\u679c\u52d5\u614b\u5730\u8abf\u7528 <code>printField<\/code> \u51fd\u6578\uff0c\u5f9e\u800c\u5be6\u73fe\u9748\u6d3b\u7684\u6578\u64da\u8b80\u53d6\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-CTAudmxTcv\">\u7e3d\u7d50<\/h2>\n<p>\u96d6\u7136C\u8a9e\u8a00\u4e0d\u76f4\u63a5\u652f\u6301\u53cd\u5c04\u6280\u8853\uff0c\u4f46\u901a\u904e\u7d50\u69cb\u9ad4\u548c\u51fd\u6578\u6307\u91dd\uff0c\u6211\u5011\u53ef\u4ee5\u6a21\u64ec\u51fa\u985e\u4f3c\u7684\u529f\u80fd\u3002\u9019\u7a2e\u65b9\u6cd5\u4e0d\u50c5\u63d0\u9ad8\u4e86\u4ee3\u78bc\u7684\u9748\u6d3b\u6027\uff0c\u9084\u80fd\u6709\u6548\u5730\u8655\u7406\u6578\u64da\u5eab\u5b57\u6bb5\u7684\u8b80\u53d6\u64cd\u4f5c\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u548c\u9748\u6d3b\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\uff0c\u9019\u7a2e\u6280\u8853\u7121\u7591\u662f\u503c\u5f97\u8003\u616e\u7684\u9078\u64c7\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u66f4\u9ad8\u6548\u7684\u6578\u64da\u8655\u7406\u548c\u5b58\u5132\u89e3\u6c7a\u65b9\u6848\u611f\u8208\u8da3\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u61c9\u7528\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22C\u8a9e\u8a00\u53cd\u5c04\u6280\u8853\uff0c\u5b78\u7fd2\u5982\u4f55\u5be6\u73fe\u8b80\u53d6\u6578\u64da\u5eab\u5b57\u6bb5\u64cd\u4f5c\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\u8207\u9748\u6d3b\u6027\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-59703","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/59703","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=59703"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/59703\/revisions"}],"predecessor-version":[{"id":59704,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/59703\/revisions\/59704"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=59703"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=59703"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=59703"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}