{"id":71487,"date":"2026-02-03T21:08:36","date_gmt":"2026-02-03T13:08:36","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/71487.html"},"modified":"2026-02-03T21:08:36","modified_gmt":"2026-02-03T13:08:36","slug":"c%e8%af%ad%e8%a8%80%ef%bc%8810%ef%bc%89-%e6%9e%84%e9%80%a0%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b%e3%80%81%e4%bd%8d%e8%bf%90%e7%ae%97","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/71487.html","title":{"rendered":"C\u8bed\u8a00\uff0810\uff09\u2014\u2014\u6784\u9020\u6570\u636e\u7c7b\u578b\u3001\u4f4d\u8fd0\u7b97"},"content":{"rendered":"<p>\u6784\u9020\u7c7b\u578b\u662f\u4e00\u79cd\u81ea\u5b9a\u4e49\u7684\u6570\u636e\u7c7b\u578b&#xff0c;\u5206\u4e3a\u7ed3\u6784\u4f53\u3001\u5171\u7528\u4f53\u3001\u679a\u4e3e\u3002<\/p>\n<h2>\u4e00\u3001\u7ed3\u6784\u4f53<\/h2>\n<h3>1.\u7ed3\u6784\u4f53\u7c7b\u578b\u7684\u5b9a\u4e49<\/h3>\n<p>struct\u00a0 \u7c7b\u578b\u540d<br \/>\n{<br \/>\n\u00a0 \u00a0 \u6570\u636e\u7c7b\u578b \u00a0\u53d8\u91cf\u540d1&#xff1b;<br \/>\n\u00a0 \u00a0 \u6570\u636e\u7c7b\u578b \u00a0\u53d8\u91cf\u540d2&#xff1b;<br \/>\n}<span style=\"background-color:null\">&#xff1b;<\/span><span style=\"background-color:null\">\/\/\u7ed3\u6784\u4f53\u7684\u7ed3\u5c3e\u8981\u52a0\u5206\u53f7<\/span><\/p>\n<p>struct Roal<br \/>\n{<br \/>\n    char name[30];<br \/>\n    short sex;<br \/>\n    int age;<br \/>\n};<\/p>\n<p>\u7ed3\u6784\u4f53\u7c7b\u578b\u5b9a\u4e49\u65f6&#xff0c;\u5728\u5206\u53f7\u524d\u52a0\u4e00\u4e2a\u53d8\u91cf\u540d&#xff0c;\u76f8\u5f53\u4e8e\u5b9a\u4e49\u4e86\u4e00\u4e2a\u5168\u5c40\u53d8\u91cf\u3002<\/p>\n<p>struct Roal<br \/>\n{<br \/>\n    char name[30];<br \/>\n    short sex;<br \/>\n    int age;<br \/>\n}g_a;<br \/>\n&#061;&#061; struct Roal g_a;<\/p>\n<h3>2. \u7ed3\u6784\u4f53\u53d8\u91cf\u7684\u5b9a\u4e49<\/h3>\n<p>\u8bed\u6cd5&#xff1a;struct \u7c7b\u578b\u540d\u00a0 \u53d8\u91cf\u540d&#xff1b;<\/p>\n<p>\u521d\u59cb\u5316&#xff1a;<\/p>\n<p>1.\u5168\u90e8\u521d\u59cb\u5316&#xff1a;<br \/>\nstruct Roal a&#061;{&#034;zhangsan&#034;,1,25};<br \/>\n2.\u90e8\u5206\u521d\u59cb\u5316&#xff1a;&#xff08;GNU\u7279\u6709\u8bed\u6cd5&#xff09;<br \/>\nstruct Roal b&#061;{.name&#061;&#034;lisi&#034;,.age&#061;20};<\/p>\n<h3>3.\u8bbf\u95ee<\/h3>\n<h4>3.1 \u76f4\u63a5\u8bbf\u95ee\u53d8\u91cf&#xff08;\u4f7f\u7528 . \u8fd0\u7b97\u7b26&#xff09;<\/h4>\n<p>\u8bfb&#xff1a;\u4e0d\u80fd\u6574\u4f53\u8f93\u51fa&#xff0c;\u8981\u4f9d\u6b21\u5bf9\u5e94\u7c7b\u578b\u8f93\u51fa\u3002<\/p>\n<p>printf(&#034;name:%s,sex:%d,age:%d\\\\n&#034;,a.name,a.sex,a.age);<\/p>\n<p>\u5199&#xff1a;\u5bf9\u53d8\u91cf\u8fdb\u884c\u8f93\u5165,\u5b57\u7b26\u4e32\u7c7b\u578b\u7528strcpy\u4fee\u6539\u5185\u5bb9\u3002<\/p>\n<p>a.age&#061;23;<br \/>\nstrcpy(a.name,&#034;lisi&#034;);<\/p>\n<h4>3.2 \u901a\u8fc7\u6307\u9488\u8bbf\u95ee&#xff08;\u4f7f\u7528 -&gt; \u8fd0\u7b97\u7b26&#xff09;<\/h4>\n<p>\u6307\u9488\u8bed\u6cd5&#xff1a;struct\u00a0 \u7c7b\u578b\u540d*\u00a0 \u6307\u9488\u540d &#061; &amp;\u53d8\u91cf\u540d&#xff1b;<\/p>\n<p>struct Roal* p&#061;&amp;a;<br \/>\nprintf(&#034;name:%s,sex:%d,age:%d\\\\n&#034;,p-&gt;name,p-&gt;sex,p-&gt;age);<\/p>\n<h3>4.\u7ed3\u6784\u4f53\u7684\u5b58\u50a8<\/h3>\n<p>\u5b57\u8282\u5bf9\u9f50\u95ee\u9898&#xff1a;<\/p>\n<p>CPU&#xff08;32bit&#xff09;\u5728\u8bbf\u95ee\u65f6\u4ee54byte\u4e3a\u5355\u4f4d\u8bbf\u95ee&#xff0c;\u6548\u7387\u9ad8\u3002<\/p>\n<p>\u7531\u4e8e\u7ed3\u6784\u4f53\u662f\u81ea\u5b9a\u4e49\u7c7b\u578b&#xff0c;\u6210\u5458\u53d8\u91cf\u6839\u636e\u9700\u8981\u6765\u5b9a\u4e49&#xff0c;\u81ea\u5b9a\u4e49\u7684\u6210\u5458\u53d8\u91cf\u7684\u76f8\u5bf9\u5730\u5740\u4e0d\u4e00\u5b9a\u57284byte\u5bf9\u9f50\u7684\u5730\u5740\u3002\u7f16\u8bd1\u5668\u4f1a\u628a\u6210\u5458\u53d8\u91cf\u7684\u5730\u5740\u6269\u5c55\u52304byte\u5bf9\u9f50\u7684\u5730\u65b9&#xff0c;\u6269\u5927\u7ed3\u6784\u4f53\u7684\u5927\u5c0f\u3002<\/p>\n<p><span style=\"background-color:#f9eda6\">\u5b57\u8282\u5bf9\u9f50\u51c6\u5219&#xff1a;<\/span><\/p>\n<ul>\n<li>\u7ed3\u6784\u4f53\u6210\u5458\u5fc5\u987b\u5b58\u653e\u5728\u8d77\u59cb\u5730\u5740\u4e3a\u81ea\u8eab\u7c7b\u578b\u5927\u5c0f\u7684\u6574\u6570\u500d\u7684\u5185\u5b58\u5730\u5740\u3002<\/li>\n<li>\u627e\u5230\u7ed3\u6784\u4f53\u4e2d\u6210\u5458\u53d8\u91cf\u5360\u7528\u5185\u5b58\u6700\u5927\u7684\u3002\u7ed3\u6784\u4f53\u7684\u603b\u5927\u5c0f&#xff0c;\u5e94\u8be5\u662f\u6700\u5927\u6210\u5458\u5360\u7528\u5185\u5b58\u5927\u5c0f\u7684\u6574\u6570\u500d\u3002<\/li>\n<\/ul>\n<h3>5.\u7ed3\u6784\u4f53\u7684\u4f20\u53c2<\/h3>\n<p>\u7ed3\u6784\u4f53\u53d8\u91cf\u7684\u7c7b\u578b\u5c31\u662f\u81ea\u5b9a\u4e49\u7684\u7ed3\u6784\u4f53\u7c7b\u578b\u3002<\/p>\n<p>\u4f20\u5730\u5740\u5bf9\u53d8\u91cf&amp;\u64cd\u4f5c&#xff0c;\u4f20\u7ed9\u51fd\u6570&#xff0c;\u7528\u7ed3\u6784\u4f53\u7c7b\u578b*\u6307\u9488\u63a5\u6536\u3002<\/p>\n<p>#include&lt;stdio.h&gt;<br \/>\nstruct Stu<br \/>\n{<br \/>\n    char name[30];<br \/>\n    int age;<br \/>\n    char sex;<br \/>\n};<\/p>\n<p>void show_stu(const struct Stu* p)\/\/\u5bf9\u53ea\u8bfb\u53c2\u6570\u52a0\u4e0aconst\u8bf4\u660e<br \/>\n{<br \/>\n    printf(&#034;name:%s,age:%d,sex:%c\\\\n&#034;,p-&gt;name,p-&gt;age,p-&gt;sex);<br \/>\n}<br \/>\nint main()<br \/>\n{<br \/>\n    struct Stu a&#061;{&#034;zhang san&#034;,20,&#039;m&#039;};<br \/>\n    show_stu(&amp;a);<br \/>\n    return 0;<br \/>\n}<\/p>\n<h3>6.\u7ed3\u6784\u4f53\u6570\u7ec4<\/h3>\n<p>1.\u5b9a\u4e49\u7ed3\u6784\u7c7b\u578b\u6570\u7ec4<br \/>\nstruct Stu a[3]&#061;{0};<\/p>\n<p>2.\u90e8\u5206\u521d\u59cb\u5316&#xff08;GNU\u7279\u6709&#xff09;<br \/>\nstruct Stu a2[3]&#061;{<br \/>\n\u00a0 \u00a0 [1]&#061;{.name&#061;&#034;lisi&#034;,.heigh&#061;1.65}<br \/>\n};<br \/>\na2[1].heigh&#061;1.88;<\/p>\n<p>3.\u7ed3\u6784\u4f53\u53d8\u91cf\u4e4b\u95f4\u53ef\u4ee5\u76f4\u63a5\u8d4b\u503c<br \/>\na2[0]&#061;a2[1];<br \/>\nstruct Stu p&#061;a[0];<\/p>\n<h2>\u4e8c\u3001\u5171\u7528\u4f53&#xff08;\u76f8\u5bf9\u4e8e\u7ed3\u6784\u4f53\u7528\u7684\u5c11&#xff09;<\/h2>\n<p>\u5171\u7528\u4f53&#xff0c;\u662f\u4e3a\u4e86\u5728\u65e9\u671f\u8ba1\u7b97\u673a\u4e2d&#xff0c;\u8282\u7701\u5185\u5b58\u7684\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7ed3\u6784\u3002<\/p>\n<p>\u5171\u7528\u4f53\u4e5f\u53eb\u8054\u5408\u4f53&#xff0c;\u6210\u5458\u53d8\u91cf\u7684\u5185\u5b58\u7a7a\u95f4\u662f\u5171\u4eab\u7684\u3002\u7ed3\u6784\u4f53\u4e2d&#xff0c;\u6bcf\u4e2a\u6210\u5458\u53d8\u91cf\u7684\u5185\u5b58\u7a7a\u95f4\u662f\u72ec\u7acb\u7684\u3002\u7ed3\u6784\u4f53\u7684\u603b\u5927\u5c0f\u4e3a\u5185\u5b58\u6700\u5927\u7684\u6210\u5458\u53d8\u91cf\u7684\u5927\u5c0f&#xff0c;\u4e00\u6b21\u53ea\u80fd\u5b58\u4e00\u4e2a\u6210\u5458\u53d8\u91cf\u3002<\/p>\n<p>\u5e94\u7528&#xff1a;\u51fd\u6570\u53c2\u6570\u4f20\u9012 &#xff0c;\u5224\u65ad\u5b58\u50a8\u65b9\u5f0f\u4e3a\u5927\u7aef\u8fd8\u662f\u5c0f\u7aef\u3002<\/p>\n<p>\u8bed\u6cd5&#xff1a;<\/p>\n<p>union \u5171\u7528\u4f53\u540d\u5b57<br \/>\n{<br \/>\n\u6570\u636e\u7c7b\u578b \u6210\u5458\u53d8\u91cf1&#xff1b;<br \/>\n\u6570\u636e\u7c7b\u578b \u6210\u5458\u53d8\u91cf2&#xff1b;<br \/>\n&#8230;<br \/>\n};<\/p>\n<p>cpu \u7684\u5b57\u8282\u987a\u5e8f&#xff1a;<\/p>\n<ul>\n<li>\u5927\u7aef\u5b58\u50a8&#xff1a;51,\u7f51\u7edc\u3002\u6570\u636e\u7684\u4f4e\u4f4d\u5728\u5185\u5b58\u7684\u9ad8\u5730\u5740&#xff0c;\u6570\u636e\u7684\u9ad8\u4f4d\u5728\u5185\u5b58\u7684\u4f4e\u5730\u5740\u3002<\/li>\n<li>\u5c0f\u7aef\u5b58\u50a8&#xff1a;arm,intel\u3002\u6570\u636e\u7684\u4f4e\u4f4d\u5728\u5185\u5b58\u7684\u4f4e\u5730\u5740&#xff0c;\u6570\u636e\u7684\u9ad8\u4f4d\u5728\u5185\u5b58\u7684\u9ad8\u5730\u5740<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"213\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260203130834-6981f352d465e.png\" width=\"457\" \/><\/p>\n<p>1.\u7528\u5171\u7528\u4f53\u5224\u65ad<br \/>\n#include &lt;stdio.h&gt;<br \/>\nunion End<br \/>\n{<br \/>\n    int i;<br \/>\n    char c;<br \/>\n};<br \/>\nint main()<br \/>\n{<br \/>\n    union End e;<br \/>\n    e.i &#061; 0x12345678;<br \/>\n    printf(&#034;%x\\\\n&#034;,e.c);\/\/\u8f93\u51fa\u4e3a78\u5219\u662f\u5c0f\u7aef&#xff0c;\u8f93\u51fa\u4e3a12\u5219\u662f\u5927\u7aef<br \/>\n    return 0;<\/p>\n<p>2.\u7528\u6570\u7ec4\u5224\u65ad<br \/>\nint main()<br \/>\n{<br \/>\n    int i &#061; 0x12345678;<br \/>\n    char * p &#061; (char*)&amp;i;<br \/>\n    printf(&#034;%x\\\\n&#034;,*p);<br \/>\n}<\/p>\n<h2><\/h2>\n<h2>\u4e09\u3001\u679a\u4e3e\u7c7b\u578b<\/h2>\n<p>\u679a\u4e3e\u7c7b\u578b\u6784\u9020\u65f6&#xff0c;\u4f1a\u628a\u53d8\u91cf\u7684\u53d6\u503c\u8303\u56f4\u4e00\u4e2a\u4e2a\u5217\u4e3e\u51fa\u6765&#xff0c;\u90a3\u4e48\u53d8\u91cf\u53ea\u80fd\u5728\u8fd9\u4e2a\u8303\u56f4\u5185\u53d6\u503c\u3002 \u5217\u4e3e\u51fa\u6765\u7684\u503c&#xff0c;\u88ab\u79f0\u4e3a\u679a\u4e3e\u503c&#xff0c;\u7c7b\u578b\u5f53\u4f5c\u6574\u5f62(int)\u5e38\u91cf\u3002<\/p>\n<p>\u8bed\u6cd5&#xff1a;<span style=\"background-color:#f9eda6\">enum \u679a\u4e3e\u7c7b\u578b\u540d {\u679a\u4e3e\u503c\u5217\u8868};<\/span><\/p>\n<ul>\n<li>\u679a\u4e3e\u503c\u9ed8\u8ba4\u4ece0\u5f00\u59cb &#xff0c;\u540e\u4e00\u4e2a\u679a\u4e3e\u503c\u5728\u524d\u4e00\u4e2a\u679a\u4e3e\u503c\u7684\u57fa\u7840\u4e0a&#043;1\u3002\u679a\u4e3e\u503c\u7684\u7c7b\u578b\u4e3aint \u5e38\u91cf<\/li>\n<li>\u679a\u4e3e\u7c7b\u578b\u5e38\u548cswitch\u642d\u914d\u4f7f\u7528<\/li>\n<li>\u6ce8\u610f\u679a\u4e3e\u7c7b\u578b\u8d4b\u503c\u7684\u65f6\u5019\u4e0d\u8981\u8d85\u51fa\u8303\u56f4\u3002 gcc\u4e0d\u4f1a\u6709\u62a5\u8b66&#xff0c;\u4f46\u903b\u8f91\u4e0a\u6709\u6f5c\u5728\u7684\u9519\u8bef\u3002<\/li>\n<\/ul>\n<p>enum WEEK {MON,TUE,WED,THU,FRI,SAT,SUN};<br \/>\nint main()<br \/>\n{<br \/>\n    enum WEEK w &#061; FRI; \/\/ \u53d8\u91cf\u5b9a\u4e49&#043; \u521d\u59cb\u5316<br \/>\n    w &#061; SUN; \/\/ w \u7684\u7c7b\u578b \u662f int<br \/>\n    switch(w)<br \/>\n    {<br \/>\n    case MON:<br \/>\n    case TUE:<br \/>\n    case WED:<br \/>\n        printf(&#034;\u5de5\u4f5c\u65e5\\\\n&#034;);<br \/>\n        break;<br \/>\n    case THU:<br \/>\n    case FRI:<br \/>\n    case SAT:<br \/>\n        printf(&#034;\u51fa\u5dee\u65e5\\\\n&#034;);<br \/>\n        break;<br \/>\n    case SUN:<br \/>\n        printf(&#034;\u653e\u5047\\\\n&#034;);<br \/>\n        break;<br \/>\n}<\/p>\n<ul><\/ul>\n<\/p>\n<h2>\u56db\u3001\u4f4d\u8fd0\u7b97<\/h2>\n<table border=\"1\" cellpadding=\"1\" cellspacing=\"1\" style=\"width:500px\">\n<tbody>\n<tr>\n<td style=\"text-align:center\">\u8fd0\u7b97\u7b26<\/td>\n<td style=\"text-align:center\">\u542b\u4e49<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align:center\">&amp;&#xff08;\u53cc\u76ee&#xff09;<\/td>\n<td style=\"text-align:center\">\u6309\u4f4d\u4e0e\u8fd0\u7b97\u7b26&#xff0c;\u4e24\u4e2a\u4e8c\u8fdb\u5236\u4f4d\u90fd\u4e3a1\u52191&#xff0c;\u53cd\u4e4b\u4e3a0<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align:center\">|&#xff08;\u53cc\u76ee&#xff09;<\/td>\n<td style=\"text-align:center\">\u6309\u4f4d\u6216\u8fd0\u7b97\u7b26&#xff0c;\u4e24\u4e2a\u4e8c\u8fdb\u5236\u4f4d\u6709\u4e00\u4e2a\u4e3a1\u52191&#xff0c;\u53cd\u4e4b\u4e3a0<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align:center\">^&#xff08;\u53cc\u76ee&#xff09;<\/td>\n<td style=\"text-align:center\">\u6309\u4f4d\u5f02\u6216\u8fd0\u7b97\u7b26&#xff0c;\u4e24\u4e2a\u4e8c\u8fdb\u5236\u4f4d\u4e0d\u540c\u52191&#xff0c;\u76f8\u540c\u4e3a0<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align:center\">~&#xff08;\u5355\u76ee&#xff09;<\/td>\n<td style=\"text-align:center\">\u6309\u4f4d\u53d6\u53cd&#xff0c;\u5bf9\u5e94\u7684\u4e8c\u8fdb\u5236\u4f4d\u4e3a1\u52190&#xff0c;\u4e3a0\u52191<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align:center\">&lt;&lt;<\/td>\n<td style=\"text-align:center\">\u903b\u8f91\u5de6\u79fb&#xff0c;\u5de6\u4f4d\u820d\u53bb&#xff0c;\u6709\u4f4d\u88650<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align:center\">&gt;&gt;<\/td>\n<td 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