{"id":48222,"date":"2025-07-30T11:12:56","date_gmt":"2025-07-30T03:12:56","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/48222.html"},"modified":"2025-07-30T11:12:56","modified_gmt":"2025-07-30T03:12:56","slug":"%e3%80%90%e9%9d%a2%e8%af%95%e7%b2%be%e9%80%89%e3%80%9130%e9%81%93c%e8%af%ad%e8%a8%80%e9%ab%98%e9%a2%91%e9%a2%98%e6%95%b4%e7%90%86%e9%99%84%e7%ad%94%e6%a1%88%e8%83%8c%e8%af%b5%e7%89%88","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/48222.html","title":{"rendered":"\u3010\u9762\u8bd5\u7cbe\u9009\u301130\u9053C\u8bed\u8a00\u9ad8\u9891\u9898\u6574\u7406(\u9644\u7b54\u6848\u80cc\u8bf5\u7248)"},"content":{"rendered":"<p>&#x1f345;\u5173\u6ce8\u3010\u58a8\u5c9a\u521b\u5ba2\u3011&#xff0c;\u56de\u590d\u3010\u6bd5\u8bbe\u3011&#xff0c;\u8d60\u9001\u514d\u8d39\u6bd5\u8bbe\u8d44\u6e90&#xff0c;\u5177\u4f53\u8054\u7cfb\u65b9\u5f0f\u89c1\u6587\u672b&#x1f345;<\/p>\n<h4>1.\u8bf7\u63cf\u8ff0\u4e00\u4e0bC\u8bed\u8a00\u7684\u57fa\u672c\u6570\u636e\u7c7b\u578b\u6709\u54ea\u4e9b&#xff1f;<\/h4>\n<p>C\u8bed\u8a00\u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u7684\u57fa\u672c\u6570\u636e\u7c7b\u578b&#xff0c;\u5b83\u4eec\u662f\u6784\u5efa\u66f4\u590d\u6742\u6570\u636e\u7ed3\u6784\u7684\u57fa\u7840\u3002\u8fd9\u4e9b\u57fa\u672c\u6570\u636e\u7c7b\u578b\u4e3b\u8981\u5305\u62ec&#xff1a;<\/p>\n<li>\n<p>\u6574\u578b&#xff08;Integer Types&#xff09;&#xff1a;\u7528\u4e8e\u5b58\u50a8\u6574\u6570\u503c\u3002\u6839\u636e\u5b58\u50a8\u5927\u5c0f\u548c\u7b26\u53f7\u6027&#xff0c;\u6574\u578b\u53c8\u53ef\u4ee5\u7ec6\u5206\u4e3a&#xff1a;<\/p>\n<ul>\n<li>int&#xff1a;\u666e\u901a\u7684\u6574\u578b&#xff0c;\u5b58\u50a8\u5927\u5c0f\u548c\u8303\u56f4\u4f9d\u8d56\u4e8e\u7cfb\u7edf\u67b6\u6784&#xff08;\u901a\u5e38\u662f32\u4f4d\u621664\u4f4d&#xff09;\u3002<\/li>\n<li>short int&#xff08;\u7b80\u5199\u4e3ashort&#xff09;&#xff1a;\u77ed\u6574\u578b&#xff0c;\u5360\u7528\u7684\u5b58\u50a8\u7a7a\u95f4\u6bd4int\u5c0f\u3002<\/li>\n<li>long int&#xff08;\u7b80\u5199\u4e3along&#xff09;&#xff1a;\u957f\u6574\u578b&#xff0c;\u5360\u7528\u7684\u5b58\u50a8\u7a7a\u95f4\u6bd4int\u5927\u3002<\/li>\n<li>long long int&#xff08;\u7b80\u5199\u4e3along long&#xff09;&#xff1a;\u66f4\u957f\u7684\u6574\u578b&#xff0c;\u7528\u4e8e\u5b58\u50a8\u66f4\u5927\u7684\u6574\u6570\u3002<\/li>\n<li>\u8fd9\u4e9b\u7c7b\u578b\u90fd\u53ef\u4ee5\u901a\u8fc7\u5728\u524d\u9762\u52a0\u4e0asigned\u6216unsigned\u6765\u8868\u793a\u7b26\u53f7&#xff08;\u9ed8\u8ba4\u4e3asigned&#xff09;&#xff0c;\u4f8b\u5982unsigned int\u8868\u793a\u65e0\u7b26\u53f7\u6574\u578b&#xff0c;\u53ea\u80fd\u5b58\u50a8\u6b63\u6570\u548c\u96f6\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u6d6e\u70b9\u7c7b\u578b&#xff08;Floating Point Types&#xff09;&#xff1a;\u7528\u4e8e\u5b58\u50a8\u5c0f\u6570\u70b9\u53ef\u4ee5\u79fb\u52a8\u7684\u6570\u503c&#xff0c;\u5373\u6d6e\u70b9\u6570\u3002\u5305\u62ec&#xff1a;<\/p>\n<ul>\n<li>float&#xff1a;\u5355\u7cbe\u5ea6\u6d6e\u70b9\u578b&#xff0c;\u63d0\u4f9b\u7ea66-7\u4f4d\u5341\u8fdb\u5236\u6570\u7684\u7cbe\u5ea6\u3002<\/li>\n<li>double&#xff1a;\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u578b&#xff0c;\u63d0\u4f9b\u7ea615-16\u4f4d\u5341\u8fdb\u5236\u6570\u7684\u7cbe\u5ea6\u3002<\/li>\n<li>long double&#xff1a;\u6269\u5c55\u7cbe\u5ea6\u6d6e\u70b9\u578b&#xff0c;\u63d0\u4f9b\u6bd4double\u66f4\u5927\u7684\u7cbe\u5ea6\u548c\u8303\u56f4\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u5b57\u7b26\u7c7b\u578b&#xff08;Character Type&#xff09;&#xff1a;<\/p>\n<ul>\n<li>char&#xff1a;\u7528\u4e8e\u5b58\u50a8\u5355\u4e2a\u5b57\u7b26&#xff08;\u5982\u5b57\u6bcd\u6216\u6570\u5b57&#xff09;\u3002\u5728\u5185\u90e8&#xff0c;\u5b57\u7b26\u901a\u8fc7\u6574\u6570\u6765\u8868\u793a&#xff08;\u4f7f\u7528ASCII\u7801\u6216\u5176\u4ed6\u5b57\u7b26\u96c6&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u5e03\u5c14\u7c7b\u578b&#xff08;Boolean Type&#xff09;&#xff1a;<\/p>\n<ul>\n<li>\u5728C99\u53ca\u4ee5\u540e\u7684\u7248\u672c\u4e2d&#xff0c;\u901a\u8fc7\u5305\u542b&lt;stdbool.h&gt;\u5934\u6587\u4ef6\u6765\u652f\u6301\u5e03\u5c14\u7c7b\u578b&#xff0c;\u5b9a\u4e49\u4e86bool\u7c7b\u578b&#xff0c;\u5b83\u53ef\u4ee5\u53d6true\u6216false\u4e24\u4e2a\u503c\u3002<\/li>\n<\/ul>\n<\/li>\n<p>\u9664\u4e86\u8fd9\u4e9b\u57fa\u672c\u7c7b\u578b&#xff0c;C\u8bed\u8a00\u8fd8\u5141\u8bb8\u901a\u8fc7\u7c7b\u578b\u4fee\u9970\u7b26&#xff08;\u5982signed\u3001unsigned\u3001short\u3001long&#xff09;\u6765\u8c03\u6574\u57fa\u672c\u7c7b\u578b\u7684\u5b58\u50a8\u5927\u5c0f\u548c\u8868\u793a\u8303\u56f4\u3002<\/p>\n<p>\u4f8b\u5982&#xff0c;\u8981\u5b58\u50a8\u5e74\u9f84&#xff0c;\u53ef\u4ee5\u4f7f\u7528unsigned int\u7c7b\u578b&#xff0c;\u56e0\u4e3a\u5e74\u9f84\u4e0d\u4f1a\u662f\u8d1f\u6570\u3002\u518d\u6bd4\u5982&#xff0c;\u5982\u679c\u8981\u5b58\u50a8\u4e00\u4e2a\u5b57\u7b26&#xff0c;\u5982\u5b57\u6bcdA&#xff0c;\u53ef\u4ee5\u4f7f\u7528char\u7c7b\u578b&#xff0c;\u5e76\u5c06\u5176\u8d4b\u503c\u4e3a&#039;A&#039;\u3002<\/p>\n<p>C\u8bed\u8a00\u7684\u8fd9\u4e9b\u57fa\u672c\u6570\u636e\u7c7b\u578b\u662f\u6784\u5efa\u53d8\u91cf\u3001\u51fd\u6570\u53c2\u6570\u7b49\u7684\u57fa\u7840&#xff0c;\u4e86\u89e3\u5b83\u4eec\u7684\u7279\u70b9\u548c\u4f7f\u7528\u573a\u666f\u5bf9\u4e8e\u7f16\u5199\u9ad8\u6548\u3001\u53ef\u9760\u7684C\u7a0b\u5e8f\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<h4>2.\u5728C\u8bed\u8a00\u4e2d&#xff0c;#include &lt;stdio.h&gt;\u548c#include &#034;stdio.h&#034;\u6709\u4ec0\u4e48\u533a\u522b&#xff1f;<\/h4>\n<p>\u5728C\u8bed\u8a00\u4e2d&#xff0c;#include\u6307\u4ee4\u7528\u4e8e\u5305\u542b\u4e00\u4e2a\u6e90\u4ee3\u7801\u6587\u4ef6\u6216\u5e93\u4e2d\u7684\u6807\u5934&#xff08;header&#xff09;\u6587\u4ef6\u3002#include &lt;stdio.h&gt;\u548c#include &#034;stdio.h&#034;\u4e4b\u95f4\u7684\u4e3b\u8981\u533a\u522b\u5728\u4e8e\u5b83\u4eec\u67e5\u627e\u5934\u6587\u4ef6\u7684\u65b9\u5f0f\u4e0d\u540c&#xff1a;<\/p>\n<li>\n<p>#include &lt;stdio.h&gt;&#xff1a;\u8fd9\u79cd\u5f62\u5f0f\u7528\u4e8e\u5305\u542b\u6807\u51c6\u5e93\u5934\u6587\u4ef6\u3002\u5f53\u4f7f\u7528\u5c16\u62ec\u53f7&lt;&gt;\u65f6&#xff0c;\u7f16\u8bd1\u5668\u4f1a\u5728\u6807\u51c6\u5e93\u7684\u5934\u6587\u4ef6\u8def\u5f84\u4e2d\u67e5\u627estdio.h\u3002\u8fd9\u4e9b\u8def\u5f84\u662f\u5728\u7f16\u8bd1\u5668\u5b89\u88c5\u65f6\u9884\u8bbe\u7684&#xff0c;\u6216\u8005\u53ef\u4ee5\u901a\u8fc7\u7f16\u8bd1\u5668\u7684\u8bbe\u7f6e\u8fdb\u884c\u914d\u7f6e\u3002\u8fd9\u610f\u5473\u7740&lt;stdio.h&gt;\u6307\u5411\u7684\u662f\u7f16\u8bd1\u5668\u63d0\u4f9b\u7684\u6807\u51c6\u8f93\u5165\u8f93\u51fa\u5934\u6587\u4ef6&#xff0c;\u7528\u4e8e\u5904\u7406\u8f93\u5165\u8f93\u51fa\u64cd\u4f5c&#xff0c;\u5982\u6253\u5370\u8f93\u51fa\u5230\u63a7\u5236\u53f0&#xff08;printf&#xff09;\u6216\u4ece\u63a7\u5236\u53f0\u8bfb\u53d6\u8f93\u5165&#xff08;scanf&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>#include &#034;stdio.h&#034;&#xff1a;\u4f7f\u7528\u53cc\u5f15\u53f7&#034;&#034;\u5305\u542b\u5934\u6587\u4ef6\u65f6&#xff0c;\u7f16\u8bd1\u5668\u9996\u5148\u5728\u5305\u542b\u6307\u4ee4\u6240\u5728\u6587\u4ef6\u7684\u5f53\u524d\u76ee\u5f55&#xff08;\u6216\u8005\u6307\u5b9a\u7684\u641c\u7d22\u8def\u5f84&#xff09;\u4e2d\u67e5\u627estdio.h\u3002\u5982\u679c\u5728\u5f53\u524d\u76ee\u5f55\u4e2d\u6ca1\u6709\u627e\u5230&#xff0c;\u7f16\u8bd1\u5668\u4f1a\u50cf\u4f7f\u7528\u5c16\u62ec\u53f7\u90a3\u6837&#xff0c;\u5728\u6807\u51c6\u5e93\u5934\u6587\u4ef6\u8def\u5f84\u4e2d\u67e5\u627e\u3002\u8fd9\u79cd\u5f62\u5f0f\u901a\u5e38\u7528\u4e8e\u5305\u542b\u7528\u6237\u5b9a\u4e49\u7684\u5934\u6587\u4ef6&#xff0c;\u6216\u8005\u5f53\u4f60\u6709\u4e00\u4e2a\u5c40\u90e8\u7248\u672c\u7684\u5934\u6587\u4ef6\u9700\u8981\u4f18\u5148\u4e8e\u6807\u51c6\u5e93\u4e2d\u7684\u540c\u540d\u5934\u6587\u4ef6\u65f6\u3002<\/p>\n<\/li>\n<p>\u603b\u7684\u6765\u8bf4&#xff0c;\u5dee\u522b\u5728\u4e8e\u67e5\u627e\u5934\u6587\u4ef6\u7684\u4f4d\u7f6e&#xff1a;<\/p>\n<ul>\n<li>\u4f7f\u7528&lt;stdio.h&gt;\u662f\u5728\u544a\u8bc9\u7f16\u8bd1\u5668&#xff0c;\u4f60\u8981\u5305\u542b\u7684\u662f\u4e00\u4e2a\u6807\u51c6\u5e93\u7684\u5934\u6587\u4ef6\u3002<\/li>\n<li>\u4f7f\u7528&#034;stdio.h&#034;\u5219\u662f\u9996\u5148\u5728\u5f53\u524d\u5de5\u4f5c\u76ee\u5f55\u67e5\u627e\u5934\u6587\u4ef6&#xff0c;\u5982\u679c\u6ca1\u6709\u627e\u5230&#xff0c;\u518d\u53bb\u6807\u51c6\u5e93\u8def\u5f84\u4e0b\u67e5\u627e\u3002<\/li>\n<\/ul>\n<p>\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b&#xff0c;\u5bf9\u4e8e\u6807\u51c6\u5e93\u5934\u6587\u4ef6\u5982stdio.h&#xff0c;\u63a8\u8350\u4f7f\u7528#include &lt;stdio.h&gt;\u5f62\u5f0f&#xff0c;\u4ee5\u8868\u660e\u8fd9\u662f\u4e00\u4e2a\u6807\u51c6\u5e93\u6587\u4ef6&#xff0c;\u800c\u4e0d\u662f\u7528\u6237\u81ea\u5b9a\u4e49\u7684\u6216\u7279\u5b9a\u4e8e\u9879\u76ee\u7684\u5934\u6587\u4ef6\u3002<\/p>\n<h4>3.\u89e3\u91ca\u4e00\u4e0b\u4ec0\u4e48\u662f\u6570\u7ec4&#xff0c;\u5e76\u4e3e\u4f8b\u8bf4\u660e\u5728C\u8bed\u8a00\u4e2d\u5982\u4f55\u5b9a\u4e49\u548c\u4f7f\u7528\u6570\u7ec4&#xff1f;<\/h4>\n<p>\u6570\u7ec4\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784&#xff0c;\u7528\u4e8e\u5b58\u50a8\u4e00\u7cfb\u5217\u540c\u7c7b\u578b\u7684\u5143\u7d20\u3002\u5728C\u8bed\u8a00\u4e2d&#xff0c;\u6570\u7ec4\u7684\u6240\u6709\u5143\u7d20\u90fd\u5fc5\u987b\u662f\u76f8\u540c\u7684\u6570\u636e\u7c7b\u578b&#xff08;\u5982\u5168\u90e8\u662fint\u7c7b\u578b\u6216\u5168\u90e8\u662ffloat\u7c7b\u578b&#xff09;\u3002\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u90fd\u53ef\u4ee5\u901a\u8fc7\u6570\u7ec4\u7d22\u5f15&#xff08;\u4e00\u4e2a\u4ece0\u5f00\u59cb\u7684\u6574\u6570&#xff09;\u6765\u8bbf\u95ee\u3002\u8fd9\u4f7f\u5f97\u6570\u7ec4\u975e\u5e38\u9002\u5408\u7528\u4e8e\u5b58\u50a8\u6570\u636e\u96c6\u5408&#xff0c;\u5982\u6570\u5b57\u5217\u8868\u6216\u5b57\u7b26\u96c6\u5408&#xff0c;\u5176\u4e2d\u5143\u7d20\u6570\u91cf\u662f\u5df2\u77e5\u7684\u3002<\/p>\n<h5>\u5b9a\u4e49\u6570\u7ec4<\/h5>\n<p>\u5728C\u8bed\u8a00\u4e2d&#xff0c;\u5b9a\u4e49\u6570\u7ec4\u7684\u57fa\u672c\u8bed\u6cd5\u662f&#xff1a;<\/p>\n<p>\u6570\u636e\u7c7b\u578b \u6570\u7ec4\u540d<span class=\"token punctuation\">[<\/span>\u6570\u7ec4\u5927\u5c0f<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<ul>\n<li>\u6570\u636e\u7c7b\u578b&#xff1a;\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u7c7b\u578b\u3002<\/li>\n<li>\u6570\u7ec4\u540d&#xff1a;\u7528\u4e8e\u6807\u8bc6\u6570\u7ec4\u7684\u540d\u79f0\u3002<\/li>\n<li>\u6570\u7ec4\u5927\u5c0f&#xff1a;\u6570\u7ec4\u4e2d\u53ef\u4ee5\u5b58\u50a8\u5143\u7d20\u7684\u6570\u91cf&#xff0c;\u5fc5\u987b\u662f\u4e00\u4e2a\u6574\u6570\u3002<\/li>\n<\/ul>\n<h5>\u793a\u4f8b&#xff1a;\u5b9a\u4e49\u548c\u4f7f\u7528\u6570\u7ec4<\/h5>\n<p>\u5047\u8bbe\u6211\u4eec\u9700\u8981\u5b58\u50a8\u4e00\u4e2a\u73ed\u7ea7\u4e2d5\u540d\u5b66\u751f\u7684\u5206\u6570&#xff0c;\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2aint\u7c7b\u578b\u7684\u6570\u7ec4\u6765\u5b9e\u73b0\u3002<\/p>\n<p><span class=\"token keyword\">int<\/span> scores<span class=\"token punctuation\">[<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u8fd9\u91cc&#xff0c;scores\u662f\u4e00\u4e2a\u53ef\u4ee5\u5b58\u50a85\u4e2a\u6574\u6570\u7684\u6570\u7ec4\u3002\u6570\u7ec4\u7684\u7d22\u5f15\u4ece0\u5f00\u59cb&#xff0c;\u6240\u4ee5scores\u6570\u7ec4\u4e2d\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u662fscores[0]&#xff0c;\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u662fscores[4]\u3002<\/p>\n<h5>\u521d\u59cb\u5316\u6570\u7ec4<\/h5>\n<p>\u5b9a\u4e49\u6570\u7ec4\u540e&#xff0c;\u53ef\u4ee5\u521d\u59cb\u5316\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u3002\u6570\u7ec4\u7684\u521d\u59cb\u5316\u53ef\u4ee5\u5728\u5b9a\u4e49\u65f6\u8fdb\u884c&#xff0c;\u4e5f\u53ef\u4ee5\u5728\u5b9a\u4e49\u540e\u5355\u72ec\u8fdb\u884c\u3002<\/p>\n<h6>\u5728\u5b9a\u4e49\u65f6\u521d\u59cb\u5316\u6570\u7ec4<\/h6>\n<p><span class=\"token keyword\">int<\/span> scores<span class=\"token punctuation\">[<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token number\">90<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">85<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">80<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">75<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">70<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h6>\u5728\u5b9a\u4e49\u540e\u521d\u59cb\u5316\u6570\u7ec4<\/h6>\n<p>scores<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">90<\/span><span class=\"token punctuation\">;<\/span><br \/>\nscores<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">85<\/span><span class=\"token punctuation\">;<\/span><br \/>\nscores<span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">80<\/span><span class=\"token punctuation\">;<\/span><br \/>\nscores<span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">75<\/span><span class=\"token punctuation\">;<\/span><br \/>\nscores<span class=\"token punctuation\">[<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">70<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h5>\u8bbf\u95ee\u6570\u7ec4\u5143\u7d20<\/h5>\n<p>\u53ef\u4ee5\u901a\u8fc7\u7d22\u5f15\u6765\u8bbf\u95ee\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20&#xff0c;\u8fdb\u884c\u8bfb\u53d6\u6216\u4fee\u6539\u64cd\u4f5c\u3002<\/p>\n<p><span class=\"token keyword\">int<\/span> highScore <span class=\"token operator\">&#061;<\/span> scores<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8bfb\u53d6\u7b2c\u4e00\u4e2a\u5143\u7d20<\/span><br \/>\nscores<span class=\"token punctuation\">[<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">95<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u4fee\u6539\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u7684\u503c\u4e3a95<\/span><\/p>\n<h5>\u793a\u4f8b&#xff1a;\u4f7f\u7528\u5faa\u73af\u8bbf\u95ee\u6570\u7ec4<\/h5>\n<p>\u5faa\u73af\u7ed3\u6784\u53ef\u4ee5\u4e0e\u6570\u7ec4\u7ed3\u5408\u4f7f\u7528&#xff0c;\u4ee5\u4fbf\u4e8e\u5904\u7406\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u3002\u4f8b\u5982&#xff0c;\u4f7f\u7528for\u5faa\u73af\u904d\u5386\u5e76\u6253\u5370scores\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5206\u6570&#xff1a;<\/p>\n<p><span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Student %d score: %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> i <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> scores<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8fd9\u4e2a\u4f8b\u5b50\u5c55\u793a\u4e86\u5982\u4f55\u5b9a\u4e49\u3001\u521d\u59cb\u5316\u3001\u8bbf\u95ee\u548c\u904d\u5386C\u8bed\u8a00\u4e2d\u7684\u6570\u7ec4&#xff0c;\u662f\u5904\u7406\u96c6\u5408\u6570\u636e\u7684\u4e00\u79cd\u57fa\u672c\u800c\u5f3a\u5927\u7684\u65b9\u5f0f\u3002<\/p>\n<h4>4.C\u8bed\u8a00\u4e2d\u7684\u6307\u9488\u662f\u4ec0\u4e48&#xff1f;\u8bf7\u7ed9\u51fa\u4e00\u4e2a\u6307\u9488\u7684\u7b80\u5355\u5e94\u7528\u793a\u4f8b\u3002<\/h4>\n<p>\u5728C\u8bed\u8a00\u4e2d&#xff0c;\u6307\u9488\u662f\u4e00\u4e2a\u53d8\u91cf&#xff0c;\u5176\u5b58\u50a8\u7684\u662f\u53e6\u4e00\u4e2a\u53d8\u91cf\u7684\u5185\u5b58\u5730\u5740\u3002\u6307\u9488\u7684\u4f7f\u7528\u975e\u5e38\u5e7f\u6cdb&#xff0c;\u5b83\u5141\u8bb8\u76f4\u63a5\u8bbf\u95ee\u548c\u64cd\u4f5c\u5185\u5b58\u4e2d\u7684\u6570\u636e&#xff0c;\u8fd9\u4f7f\u5f97\u7a0b\u5e8f\u80fd\u591f\u4ee5\u66f4\u7075\u6d3b\u548c\u9ad8\u6548\u7684\u65b9\u5f0f\u5904\u7406\u6570\u636e\u548c\u5185\u5b58\u3002<\/p>\n<h5>\u6307\u9488\u7684\u57fa\u672c\u6982\u5ff5<\/h5>\n<ul>\n<li>\u6307\u9488\u53d8\u91cf&#xff1a;\u7528\u6765\u5b58\u50a8\u5185\u5b58\u5730\u5740\u7684\u53d8\u91cf\u3002\u6307\u9488\u7684\u7c7b\u578b\u51b3\u5b9a\u4e86\u6307\u9488\u6307\u5411\u7684\u53d8\u91cf\u7c7b\u578b&#xff0c;\u4ee5\u53ca\u901a\u8fc7\u6307\u9488\u53ef\u4ee5\u8bbf\u95ee\u7684\u6570\u636e\u5927\u5c0f\u3002<\/li>\n<li>\u6307\u9488\u7684\u58f0\u660e&#xff1a;\u6307\u9488\u58f0\u660e\u9700\u8981\u6307\u5b9a\u6307\u9488\u7c7b\u578b&#xff0c;\u5373\u5b83\u5c06\u6307\u5411\u7684\u6570\u636e\u7684\u7c7b\u578b\u3002\u58f0\u660e\u6307\u9488\u7684\u8bed\u6cd5\u5982\u4e0b&#xff1a;<\/li>\n<\/ul>\n<p>\u6570\u636e\u7c7b\u578b <span class=\"token operator\">*<\/span>\u6307\u9488\u53d8\u91cf\u540d<span class=\"token punctuation\">;<\/span><\/p>\n<p>\u4f8b\u5982&#xff0c;int *ptr;\u58f0\u660e\u4e86\u4e00\u4e2a\u6307\u5411int\u7c7b\u578b\u6570\u636e\u7684\u6307\u9488ptr\u3002<\/p>\n<h5>\u6307\u9488\u7684\u5e94\u7528\u793a\u4f8b<\/h5>\n<p>\u5047\u8bbe\u6211\u4eec\u60f3\u8981\u5728\u51fd\u6570\u4e2d\u4ea4\u6362\u4e24\u4e2a\u6574\u6570\u7684\u503c\u3002\u901a\u5e38&#xff0c;\u5982\u679c\u76f4\u63a5\u4f20\u9012\u503c\u7ed9\u51fd\u6570&#xff0c;\u51fd\u6570\u5185\u7684\u64cd\u4f5c\u4e0d\u4f1a\u5f71\u54cd\u539f\u59cb\u53d8\u91cf\u3002\u4f46\u662f&#xff0c;\u5982\u679c\u6211\u4eec\u4f7f\u7528\u6307\u9488\u4f5c\u4e3a\u53c2\u6570&#xff0c;\u5c31\u53ef\u4ee5\u76f4\u63a5\u5728\u539f\u59cb\u5185\u5b58\u5730\u5740\u4e0a\u64cd\u4f5c\u6570\u636e&#xff0c;\u5b9e\u73b0\u4ea4\u6362\u3002<\/p>\n<h6>\u793a\u4f8b\u4ee3\u7801<\/h6>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u51fd\u6570\u58f0\u660e&#xff0c;\u63a5\u53d7\u4e24\u4e2a\u6307\u5411int\u7684\u6307\u9488\u4f5c\u4e3a\u53c2\u6570<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">swap<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> <span class=\"token operator\">*<\/span>a<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token operator\">*<\/span>b<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> temp <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">*<\/span>a<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u901a\u8fc7\u6307\u9488a\u8bbf\u95ee\u5176\u6307\u5411\u7684\u503c&#xff0c;\u5e76\u5b58\u50a8\u5728temp<\/span><br \/>\n    <span class=\"token operator\">*<\/span>a <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">*<\/span>b<span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/\/ \u5c06\u6307\u9488b\u6307\u5411\u7684\u503c\u8d4b\u7ed9\u6307\u9488a\u6307\u5411\u7684\u4f4d\u7f6e<\/span><br \/>\n    <span class=\"token operator\">*<\/span>b <span class=\"token operator\">&#061;<\/span> temp<span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/\/ \u5c06temp&#xff08;\u539f\u59cba\u7684\u503c&#xff09;\u8d4b\u7ed9\u6307\u9488b\u6307\u5411\u7684\u4f4d\u7f6e<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> x <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span> y <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">20<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Before swap: x &#061; %d, y &#061; %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> x<span class=\"token punctuation\">,<\/span> y<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">swap<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>x<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>y<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8c03\u7528swap\u51fd\u6570&#xff0c;\u4f20\u9012x\u548cy\u7684\u5730\u5740<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;After swap: x &#061; %d, y &#061; %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> x<span class=\"token punctuation\">,<\/span> y<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d&#xff1a;<\/p>\n<ul>\n<li>swap\u51fd\u6570\u901a\u8fc7\u6307\u9488\u63a5\u53d7\u4e24\u4e2aint\u53d8\u91cf\u7684\u5730\u5740\u3002<\/li>\n<li>\u5728\u51fd\u6570\u5185\u90e8&#xff0c;\u901a\u8fc7\u89e3\u5f15\u7528\u6307\u9488&#xff08;\u4f7f\u7528*\u64cd\u4f5c\u7b26&#xff09;\u6765\u8bbf\u95ee\u548c\u4fee\u6539\u6307\u9488\u6307\u5411\u7684\u503c\u3002<\/li>\n<li>\u901a\u8fc7\u5c06x\u548cy\u7684\u5730\u5740\u4f20\u9012\u7ed9swap\u51fd\u6570&#xff0c;\u6211\u4eec\u53ef\u4ee5\u76f4\u63a5\u5728\u539f\u59cb\u4f4d\u7f6e\u4ea4\u6362\u5b83\u4eec\u7684\u503c\u3002<\/li>\n<\/ul>\n<p>\u8fd9\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\u5c55\u793a\u4e86\u6307\u9488\u5982\u4f55\u5141\u8bb8C\u7a0b\u5e8f\u76f4\u63a5\u8bbf\u95ee\u548c\u4fee\u6539\u5185\u5b58\u4e2d\u7684\u6570\u636e&#xff0c;\u63d0\u4f9b\u4e86\u7f16\u7a0b\u7684\u7075\u6d3b\u6027\u548c\u6548\u7387\u3002<\/p>\n<h4>5.\u63cf\u8ff0\u4e00\u4e0bC\u8bed\u8a00\u4e2d\u7684\u51fd\u6570\u6307\u9488&#xff0c;\u5e76\u4e3e\u4f8b\u8bf4\u660e\u5176\u7528\u9014\u3002<\/h4>\n<p>\u5728C\u8bed\u8a00\u4e2d&#xff0c;\u51fd\u6570\u6307\u9488\u662f\u6307\u5411\u51fd\u6570\u7684\u6307\u9488&#xff0c;\u5373\u5b83\u7684\u503c\u662f\u4e00\u4e2a\u51fd\u6570\u7684\u5730\u5740\u3002\u8fd9\u4f7f\u5f97\u7a0b\u5e8f\u80fd\u591f\u5b58\u50a8\u51fd\u6570\u7684\u5730\u5740\u5728\u53d8\u91cf\u4e2d&#xff0c;\u901a\u8fc7\u8fd9\u4e9b\u53d8\u91cf\u8c03\u7528\u51fd\u6570&#xff0c;\u6216\u8005\u5c06\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u5176\u4ed6\u51fd\u6570\u3002\u51fd\u6570\u6307\u9488\u7684\u4f7f\u7528\u589e\u52a0\u4e86\u7a0b\u5e8f\u7684\u7075\u6d3b\u6027\u548c\u52a8\u6001\u6027&#xff0c;\u5141\u8bb8\u5b9e\u73b0\u5982\u56de\u8c03\u51fd\u6570\u3001\u51fd\u6570\u8868\u7b49\u9ad8\u7ea7\u7f16\u7a0b\u6280\u5de7\u3002<\/p>\n<h5>\u51fd\u6570\u6307\u9488\u7684\u57fa\u672c\u8bed\u6cd5<\/h5>\n<p>\u58f0\u660e\u4e00\u4e2a\u51fd\u6570\u6307\u9488\u65f6&#xff0c;\u4f60\u9700\u8981\u6307\u5b9a\u51fd\u6570\u7684\u8fd4\u56de\u7c7b\u578b\u3001\u6307\u9488\u540d\u79f0\u4ee5\u53ca\u51fd\u6570\u53c2\u6570\u7684\u7c7b\u578b\u3002\u8bed\u6cd5\u7ed3\u6784\u5982\u4e0b&#xff1a;<\/p>\n<p>\u8fd4\u56de\u7c7b\u578b <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>\u6307\u9488\u53d8\u91cf\u540d<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span>\u53c2\u6570\u7c7b\u578b\u5217\u8868<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h5>\u51fd\u6570\u6307\u9488\u7684\u7528\u9014<\/h5>\n<p>\u51fd\u6570\u6307\u9488\u7684\u4e00\u4e2a\u5e38\u89c1\u7528\u9014\u662f\u4f5c\u4e3a\u56de\u8c03\u51fd\u6570\u3002\u56de\u8c03\u51fd\u6570\u662f\u7531\u5176\u4ed6\u51fd\u6570\u5728\u7279\u5b9a\u4e8b\u4ef6\u6216\u6761\u4ef6\u6ee1\u8db3\u65f6\u8c03\u7528\u7684\u51fd\u6570\u3002\u8fd9\u5bf9\u4e8e\u4e8b\u4ef6\u9a71\u52a8\u7f16\u7a0b\u6216\u9700\u8981\u6309\u7167\u7528\u6237\u7684\u9700\u6c42\u53d8\u5316\u8c03\u7528\u4e0d\u540c\u51fd\u6570\u7684\u60c5\u51b5\u975e\u5e38\u6709\u7528\u3002<\/p>\n<h5>\u793a\u4f8b&#xff1a;\u4f7f\u7528\u51fd\u6570\u6307\u9488\u4f5c\u4e3a\u56de\u8c03\u51fd\u6570<\/h5>\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e24\u4e2a\u51fd\u6570add\u548cmultiply&#xff0c;\u5b83\u4eec\u5206\u522b\u8ba1\u7b97\u4e24\u4e2a\u6574\u6570\u7684\u548c\u4e0e\u79ef\u3002\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u51fd\u6570\u6307\u9488operation&#xff0c;\u6839\u636e\u9700\u8981\u6307\u5411\u8fd9\u4e24\u4e2a\u51fd\u6570\u4e2d\u7684\u4efb\u610f\u4e00\u4e2a&#xff0c;\u5e76\u901a\u8fc7\u8fd9\u4e2a\u6307\u9488\u8c03\u7528\u51fd\u6570\u3002<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u4e24\u4e2a\u64cd\u4f5c\u51fd\u6570<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> x<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> y<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> x <span class=\"token operator\">&#043;<\/span> y<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">multiply<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> x<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> y<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> x <span class=\"token operator\">*<\/span> y<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u51fd\u6570&#xff0c;\u63a5\u53d7\u4e24\u4e2a\u6574\u6570\u548c\u4e00\u4e2a\u51fd\u6570\u6307\u9488\u4f5c\u4e3a\u53c2\u6570<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">performOperation<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> x<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> y<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>operation<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token function\">operation<\/span><span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">,<\/span> y<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> a <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">,<\/span> b <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u8c03\u7528performOperation&#xff0c;\u4f20\u9012add\u51fd\u6570\u7684\u5730\u5740<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Addition: %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">performOperation<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">,<\/span> b<span class=\"token punctuation\">,<\/span> add<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u8c03\u7528performOperation&#xff0c;\u4f20\u9012multiply\u51fd\u6570\u7684\u5730\u5740<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Multiplication: %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">performOperation<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">,<\/span> b<span class=\"token punctuation\">,<\/span> multiply<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d&#xff0c;performOperation\u51fd\u6570\u63a5\u53d7\u4e24\u4e2a\u6574\u6570\u548c\u4e00\u4e2a\u6307\u5411\u51fd\u6570\u7684\u6307\u9488\u4f5c\u4e3a\u53c2\u6570\u3002\u8fd9\u4e2a\u6307\u9488\u53ef\u4ee5\u6307\u5411\u4efb\u4f55\u63a5\u53d7\u4e24\u4e2a\u6574\u6570\u53c2\u6570\u5e76\u8fd4\u56de\u4e00\u4e2a\u6574\u6570\u7684\u51fd\u6570\u3002\u901a\u8fc7\u5c06add\u548cmultiply\u51fd\u6570\u7684\u5730\u5740\u4f20\u9012\u7ed9performOperation&#xff0c;\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u9700\u8981\u52a8\u6001\u5730\u8c03\u7528\u4e0d\u540c\u7684\u51fd\u6570\u3002<\/p>\n<p>\u8fd9\u79cd\u65b9\u5f0f\u4f7f\u5f97\u4ee3\u7801\u66f4\u52a0\u7075\u6d3b\u548c\u590d\u7528\u6027\u9ad8&#xff0c;\u7279\u522b\u662f\u5728\u5904\u7406\u7c7b\u4f3c\u4e8b\u4ef6\u5904\u7406\u3001\u6392\u5e8f\u7b97\u6cd5\u6216\u6570\u5b66\u8fd0\u7b97\u7b49\u9700\u8981\u6839\u636e\u4e0d\u540c\u60c5\u51b5\u9009\u62e9\u4e0d\u540c\u64cd\u4f5c\u7684\u573a\u666f\u4e2d\u3002\u51fd\u6570\u6307\u9488\u4e3aC\u8bed\u8a00\u7f16\u7a0b\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u5de5\u5177&#xff0c;\u4f7f\u5f97\u53ef\u4ee5\u6839\u636e\u4e0a\u4e0b\u6587\u52a8\u6001\u51b3\u5b9a\u8c03\u7528\u54ea\u4e2a\u51fd\u6570\u3002<\/p>\n<h4>6.\u8bf7\u89e3\u91caC\u8bed\u8a00\u4e2d\u7684\u5185\u5b58\u5206\u914d\u51fd\u6570malloc()\u548ccalloc()\u7684\u533a\u522b\u3002<\/h4>\n<p>\u5728C\u8bed\u8a00\u4e2d&#xff0c;malloc()\u548ccalloc()\u90fd\u662f\u7528\u4e8e\u52a8\u6001\u5185\u5b58\u5206\u914d\u7684\u51fd\u6570&#xff0c;\u5b83\u4eec\u5141\u8bb8\u5728\u7a0b\u5e8f\u8fd0\u884c\u65f6\u6839\u636e\u9700\u8981\u5206\u914d\u5185\u5b58\u7a7a\u95f4\u3002\u5c3d\u7ba1\u5b83\u4eec\u7684\u76ee\u7684\u76f8\u540c&#xff0c;\u4f46\u5b83\u4eec\u5728\u884c\u4e3a\u548c\u7528\u6cd5\u4e0a\u6709\u4e00\u4e9b\u533a\u522b&#xff1a;<\/p>\n<h5>malloc() \u51fd\u6570<\/h5>\n<ul>\n<li>\u4f5c\u7528&#xff1a;malloc()&#xff08;Memory Allocation&#xff09;\u51fd\u6570\u7528\u4e8e\u5206\u914d\u4e00\u5757\u8fde\u7eed\u7684\u5185\u5b58\u5757\u3002<\/li>\n<li>\u8bed\u6cd5&#xff1a;void* malloc(size_t size);<\/li>\n<li>\u53c2\u6570&#xff1a;\u63a5\u53d7\u4e00\u4e2a\u53c2\u6570&#xff0c;\u5373\u9700\u8981\u5206\u914d\u7684\u5185\u5b58\u5927\u5c0f&#xff08;\u4ee5\u5b57\u8282\u4e3a\u5355\u4f4d&#xff09;\u3002<\/li>\n<li>\u521d\u59cb\u5316&#xff1a;malloc()\u5206\u914d\u7684\u5185\u5b58\u5757\u5185\u5bb9\u662f\u672a\u521d\u59cb\u5316\u7684&#xff0c;\u4e5f\u5c31\u662f\u8bf4&#xff0c;\u5185\u5b58\u4e2d\u7684\u521d\u59cb\u503c\u662f\u4e0d\u786e\u5b9a\u7684\u3002\u8fd9\u53ef\u80fd\u4f1a\u5305\u542b\u5783\u573e\u503c\u3002<\/li>\n<\/ul>\n<h5>\u793a\u4f8b&#xff1a;\u4f7f\u7528malloc()<\/h5>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token operator\">*<\/span>ptr <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token function\">malloc<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">5<\/span> <span class=\"token operator\">*<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5206\u914d\u4e00\u4e2a\u8db3\u591f\u5b58\u50a85\u4e2a\u6574\u6570\u7684\u5185\u5b58\u5757<\/span><\/p>\n<h5>calloc() \u51fd\u6570<\/h5>\n<ul>\n<li>\u4f5c\u7528&#xff1a;calloc()&#xff08;Contiguous Allocation&#xff09;\u51fd\u6570\u4e5f\u7528\u4e8e\u5206\u914d\u5185\u5b58&#xff0c;\u4f46\u5b83\u662f\u4e13\u95e8\u7528\u4e8e\u5206\u914d\u5e76\u521d\u59cb\u5316\u5185\u5b58\u5757\u3002<\/li>\n<li>\u8bed\u6cd5&#xff1a;void* calloc(size_t num, size_t size);<\/li>\n<li>\u53c2\u6570&#xff1a;\u63a5\u53d7\u4e24\u4e2a\u53c2\u6570&#xff0c;\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u5143\u7d20\u7684\u6570\u91cf&#xff0c;\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u6bcf\u4e2a\u5143\u7d20\u7684\u5927\u5c0f&#xff08;\u4ee5\u5b57\u8282\u4e3a\u5355\u4f4d&#xff09;\u3002<\/li>\n<li>\u521d\u59cb\u5316&#xff1a;\u5206\u914d\u7684\u5185\u5b58\u4f1a\u81ea\u52a8\u521d\u59cb\u5316\u4e3a\u96f6\u3002\u8fd9\u610f\u5473\u7740&#xff0c;\u4e0emalloc()\u5206\u914d\u7684\u5185\u5b58\u53ef\u80fd\u542b\u6709\u5783\u573e\u503c\u4e0d\u540c&#xff0c;calloc()\u5206\u914d\u7684\u5185\u5b58\u5757\u6bcf\u4e2a\u5b57\u8282\u90fd\u4f1a\u88ab\u521d\u59cb\u5316\u4e3a0\u3002<\/li>\n<\/ul>\n<h5>\u793a\u4f8b&#xff1a;\u4f7f\u7528calloc()<\/h5>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token operator\">*<\/span>ptr <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token function\">calloc<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5206\u914d\u5e76\u521d\u59cb\u5316\u4e00\u4e2a\u8db3\u591f\u5b58\u50a85\u4e2a\u6574\u6570\u7684\u5185\u5b58\u5757<\/span><\/p>\n<h5>\u4e3b\u8981\u533a\u522b<\/h5>\n<li>\u53c2\u6570&#xff1a;malloc()\u63a5\u53d7\u5355\u4e00\u53c2\u6570&#xff08;\u9700\u8981\u5206\u914d\u7684\u603b\u5185\u5b58\u5927\u5c0f&#xff09;&#xff0c;\u800ccalloc()\u63a5\u53d7\u4e24\u4e2a\u53c2\u6570&#xff08;\u5143\u7d20\u6570\u91cf\u548c\u6bcf\u4e2a\u5143\u7d20\u7684\u5927\u5c0f&#xff09;\u3002<\/li>\n<li>\u521d\u59cb\u5316&#xff1a;malloc()\u5206\u914d\u7684\u5185\u5b58\u5757\u4e0d\u4f1a\u88ab\u81ea\u52a8\u521d\u59cb\u5316&#xff0c;\u53ef\u80fd\u5305\u542b\u5783\u573e\u503c\u3002calloc()\u5206\u914d\u7684\u5185\u5b58\u5757\u4f1a\u88ab\u81ea\u52a8\u521d\u59cb\u5316\u4e3a\u96f6\u3002<\/li>\n<h5>\u4f7f\u7528\u573a\u666f<\/h5>\n<ul>\n<li>\u4f7f\u7528malloc()\u65f6&#xff0c;\u5982\u679c\u4f60\u4e0d\u9700\u8981\u5185\u5b58\u88ab\u9884\u5148\u6e05\u96f6&#xff0c;\u6216\u8005\u6253\u7b97\u7acb\u5373\u8d4b\u503c\u7ed9\u5206\u914d\u7684\u5185\u5b58&#xff0c;malloc()\u53ef\u80fd\u662f\u66f4\u597d\u7684\u9009\u62e9&#xff0c;\u56e0\u4e3a\u5b83\u7a0d\u5fae\u5feb\u4e00\u70b9\u3002<\/li>\n<li>\u5982\u679c\u4f60\u9700\u8981\u5185\u5b58\u88ab\u521d\u59cb\u5316\u4e3a\u96f6&#xff0c;\u6216\u8005\u5bf9\u5185\u5b58\u5757\u4e2d\u7684\u521d\u59cb\u503c\u6709\u660e\u786e\u7684\u8981\u6c42&#xff0c;\u4f7f\u7528calloc()\u4f1a\u66f4\u5b89\u5168\u3002<\/li>\n<\/ul>\n<p>\u65e0\u8bba\u4f7f\u7528\u54ea\u4e2a\u51fd\u6570&#xff0c;\u90fd\u5e94\u8be5\u68c0\u67e5\u8fd4\u56de\u503c\u4ee5\u786e\u4fdd\u5185\u5b58\u5206\u914d\u6210\u529f&#xff0c;\u5e76\u5728\u4e0d\u518d\u9700\u8981\u65f6\u4f7f\u7528free()\u51fd\u6570\u91ca\u653e\u5185\u5b58&#xff0c;\u907f\u514d\u5185\u5b58\u6cc4\u9732\u3002<\/p>\n<h4>7.\u4ec0\u4e48\u662f\u7ed3\u6784\u4f53&#xff08;struct&#xff09;&#xff1f;\u5982\u4f55\u5728C\u8bed\u8a00\u4e2d\u5b9a\u4e49\u548c\u4f7f\u7528\u7ed3\u6784\u4f53&#xff1f;<\/h4>\n<p>\u5728C\u8bed\u8a00\u4e2d&#xff0c;\u7ed3\u6784\u4f53&#xff08;struct&#xff09;\u662f\u4e00\u79cd\u590d\u5408\u6570\u636e\u7c7b\u578b&#xff0c;\u5141\u8bb8\u5c06\u591a\u4e2a\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e\u9879\u7ec4\u5408\u4e3a\u4e00\u4e2a\u5355\u4e00\u7684\u7c7b\u578b\u3002\u7ed3\u6784\u4f53\u5e7f\u6cdb\u7528\u4e8e\u7ec4\u7ec7\u548c\u5904\u7406\u6570\u636e&#xff0c;\u4f7f\u5f97\u6570\u636e\u7ba1\u7406\u66f4\u52a0\u6a21\u5757\u5316\u548c\u6e05\u6670\u3002\u901a\u8fc7\u7ed3\u6784\u4f53&#xff0c;\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u6570\u636e\u6a21\u578b&#xff0c;\u5176\u4e2d\u5305\u542b\u591a\u4e2a\u5c5e\u6027&#xff0c;\u8fd9\u4e9b\u5c5e\u6027\u53ef\u4ee5\u662f\u57fa\u672c\u6570\u636e\u7c7b\u578b&#xff08;\u5982int\u3001float\u7b49&#xff09;\u6216\u5176\u4ed6\u7ed3\u6784\u4f53\u3002<\/p>\n<h5>\u5b9a\u4e49\u7ed3\u6784\u4f53<\/h5>\n<p>\u5b9a\u4e49\u7ed3\u6784\u4f53\u7684\u57fa\u672c\u8bed\u6cd5\u5982\u4e0b&#xff1a;<\/p>\n<p><span class=\"token keyword\">struct<\/span> \u7ed3\u6784\u4f53\u540d\u79f0 <span class=\"token punctuation\">{<\/span><br \/>\n    \u6570\u636e\u7c7b\u578b \u6210\u5458<span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    \u6570\u636e\u7c7b\u578b \u6210\u5458<span class=\"token number\">2<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<ul>\n<li>struct \u5173\u952e\u5b57\u7528\u4e8e\u5b9a\u4e49\u7ed3\u6784\u4f53\u3002<\/li>\n<li>\u7ed3\u6784\u4f53\u540d\u79f0 \u662f\u7ed3\u6784\u4f53\u7684\u6807\u8bc6\u7b26\u3002<\/li>\n<li>\u6210\u5458 \u662f\u7ec4\u6210\u7ed3\u6784\u4f53\u7684\u53d8\u91cf&#xff0c;\u53ef\u4ee5\u662f\u4e0d\u540c\u7684\u6570\u636e\u7c7b\u578b\u3002<\/li>\n<\/ul>\n<h5>\u793a\u4f8b&#xff1a;\u5b9a\u4e49\u7ed3\u6784\u4f53<\/h5>\n<p>\u5047\u8bbe\u6211\u4eec\u8981\u5b9a\u4e49\u4e00\u4e2a\u7ed3\u6784\u4f53\u6765\u8868\u793a\u4e00\u4e2a\u5b66\u751f&#xff0c;\u5305\u542b\u5b66\u751f\u7684\u59d3\u540d\u3001\u5e74\u9f84\u548c\u6210\u7ee9&#xff1a;<\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Student<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> name<span class=\"token punctuation\">[<\/span><span class=\"token number\">50<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">float<\/span> score<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h5>\u4f7f\u7528\u7ed3\u6784\u4f53<\/h5>\n<p>\u5b9a\u4e49\u7ed3\u6784\u4f53\u540e&#xff0c;\u53ef\u4ee5\u50cf\u4f7f\u7528\u57fa\u672c\u6570\u636e\u7c7b\u578b\u4e00\u6837\u4f7f\u7528\u5b83&#xff0c;\u5305\u62ec\u58f0\u660e\u7ed3\u6784\u4f53\u53d8\u91cf\u3001\u8bbf\u95ee\u6210\u5458\u3001\u4f20\u9012\u7ed3\u6784\u4f53\u5230\u51fd\u6570\u7b49\u3002<\/p>\n<h6>\u58f0\u660e\u7ed3\u6784\u4f53\u53d8\u91cf<\/h6>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Student<\/span> student1<span class=\"token punctuation\">;<\/span><\/p>\n<h6>\u521d\u59cb\u5316\u7ed3\u6784\u4f53<\/h6>\n<p>\u53ef\u4ee5\u5728\u58f0\u660e\u65f6\u76f4\u63a5\u521d\u59cb\u5316\u7ed3\u6784\u4f53\u6210\u5458&#xff1a;<\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Student<\/span> student1 <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;John Doe&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">20<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">92.5<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h6>\u8bbf\u95ee\u7ed3\u6784\u4f53\u6210\u5458<\/h6>\n<p>\u4f7f\u7528\u70b9&#xff08;.&#xff09;\u64cd\u4f5c\u7b26\u6765\u8bbf\u95ee\u7ed3\u6784\u4f53\u7684\u6210\u5458&#xff1a;<\/p>\n<p><span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Student Name: %s\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> student1<span class=\"token punctuation\">.<\/span>name<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Student Age: %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> student1<span class=\"token punctuation\">.<\/span>age<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Student Score: %.2f\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> student1<span class=\"token punctuation\">.<\/span>score<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h6>\u901a\u8fc7\u6307\u9488\u8bbf\u95ee\u7ed3\u6784\u4f53<\/h6>\n<p>\u5f53\u4f7f\u7528\u6307\u9488\u6307\u5411\u7ed3\u6784\u4f53\u65f6&#xff0c;\u4f7f\u7528\u7bad\u5934&#xff08;-&gt;&#xff09;\u64cd\u4f5c\u7b26\u6765\u8bbf\u95ee\u7ed3\u6784\u4f53\u7684\u6210\u5458&#xff1a;<\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Student<\/span> <span class=\"token operator\">*<\/span>ptr <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">&amp;<\/span>student1<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Student Name: %s\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> ptr<span class=\"token operator\">-&gt;<\/span>name<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Student Age: %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> ptr<span class=\"token operator\">-&gt;<\/span>age<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Student Score: %.2f\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> ptr<span class=\"token operator\">-&gt;<\/span>score<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u7ed3\u6784\u4f53\u5728C\u8bed\u8a00\u4e2d\u662f\u975e\u5e38\u5f3a\u5927\u7684\u5de5\u5177&#xff0c;\u5b83\u4eec\u5141\u8bb8\u5f00\u53d1\u8005\u5c06\u76f8\u5173\u7684\u6570\u636e\u7ec4\u5408\u6210\u5355\u4e2a\u5b9e\u4f53&#xff0c;\u8fd9\u6837\u53ef\u4ee5\u66f4\u5bb9\u6613\u5730\u7ba1\u7406\u548c\u4f20\u9012\u590d\u6742\u7684\u6570\u636e\u7ed3\u6784\u3002\u4f8b\u5982&#xff0c;\u5982\u679c\u4f60\u60f3\u7f16\u5199\u4e00\u4e2a\u7a0b\u5e8f\u6765\u5904\u7406\u4e00\u4e2a\u73ed\u7ea7\u91cc\u6240\u6709\u5b66\u751f\u7684\u4fe1\u606f&#xff0c;\u4f7f\u7528\u7ed3\u6784\u4f53\u6765\u8868\u793a\u6bcf\u4e2a\u5b66\u751f\u4f1a\u662f\u4e00\u4e2a\u975e\u5e38\u5408\u9002\u7684\u9009\u62e9\u3002<\/p>\n<h4>8.\u5728C\u8bed\u8a00\u4e2d&#xff0c;\u5982\u4f55\u5b9a\u4e49\u548c\u4f7f\u7528\u8054\u5408\u4f53&#xff08;union&#xff09;&#xff1f;\u5b83\u4e0e\u7ed3\u6784\u4f53\u6709\u4f55\u4e0d\u540c&#xff1f;<\/h4>\n<p>\u5728C\u8bed\u8a00\u4e2d&#xff0c;\u8054\u5408\u4f53&#xff08;union&#xff09;\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u6570\u636e\u7c7b\u578b&#xff0c;\u5141\u8bb8\u5728\u76f8\u540c\u7684\u5185\u5b58\u4f4d\u7f6e\u5b58\u50a8\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e\u3002\u8054\u5408\u4f53\u53ef\u4ee5\u5305\u542b\u591a\u4e2a\u6210\u5458&#xff0c;\u4f46\u5728\u4efb\u4f55\u7ed9\u5b9a\u65f6\u523b&#xff0c;\u53ea\u80fd\u6709\u4e00\u4e2a\u6210\u5458\u5177\u6709\u503c\u3002\u8fd9\u610f\u5473\u7740\u8054\u5408\u4f53\u7684\u5927\u5c0f\u7b49\u4e8e\u5176\u6700\u5927\u6210\u5458\u7684\u5927\u5c0f&#xff0c;\u4e0d\u540c\u6210\u5458\u5171\u4eab\u5185\u5b58\u7a7a\u95f4\u3002<\/p>\n<h5>\u5b9a\u4e49\u8054\u5408\u4f53<\/h5>\n<p>\u5b9a\u4e49\u8054\u5408\u4f53\u7684\u8bed\u6cd5\u4e0e\u7ed3\u6784\u4f53\u7c7b\u4f3c&#xff0c;\u4f46\u4f7f\u7528union\u5173\u952e\u5b57&#xff1a;<\/p>\n<p><span class=\"token keyword\">union<\/span> \u8054\u5408\u4f53\u540d\u79f0 <span class=\"token punctuation\">{<\/span><br \/>\n    \u6570\u636e\u7c7b\u578b \u6210\u5458<span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    \u6570\u636e\u7c7b\u578b \u6210\u5458<span class=\"token number\">2<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h5>\u793a\u4f8b&#xff1a;\u5b9a\u4e49\u548c\u4f7f\u7528\u8054\u5408\u4f53<\/h5>\n<p>\u5047\u8bbe\u6211\u4eec\u60f3\u5b9a\u4e49\u4e00\u4e2a\u8054\u5408\u4f53Data&#xff0c;\u5b83\u53ef\u4ee5\u5b58\u50a8\u6574\u6570\u3001\u6d6e\u70b9\u6570\u6216\u5b57\u7b26&#xff1a;<\/p>\n<p><span class=\"token keyword\">union<\/span> Data <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> i<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">float<\/span> f<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> c<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h6>\u4f7f\u7528\u8054\u5408\u4f53<\/h6>\n<p><span class=\"token keyword\">union<\/span> Data data<span class=\"token punctuation\">;<\/span><\/p>\n<p>data<span class=\"token punctuation\">.<\/span>i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;data.i &#061; %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> data<span class=\"token punctuation\">.<\/span>i<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>data<span class=\"token punctuation\">.<\/span>f <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">220.5<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;data.f &#061; %.1f\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> data<span class=\"token punctuation\">.<\/span>f<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>data<span class=\"token punctuation\">.<\/span>c <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#039;A&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;data.c &#061; %c\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> data<span class=\"token punctuation\">.<\/span>c<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d&#xff0c;\u5c3d\u7ba1\u6211\u4eec\u4e3ai\u3001f\u548cc\u5206\u522b\u8d4b\u4e86\u503c&#xff0c;\u4f46\u7531\u4e8e\u5b83\u4eec\u5171\u4eab\u540c\u4e00\u5757\u5185\u5b58&#xff0c;\u6700\u7ec8\u7684\u503c\u53d6\u51b3\u4e8e\u6700\u540e\u4e00\u6b21\u8d4b\u503c\u64cd\u4f5c\u3002\u56e0\u6b64&#xff0c;\u6253\u5370data.i\u6216data.f\u7684\u7ed3\u679c\u53ef\u80fd\u4e0d\u4f1a\u662f\u9884\u671f\u7684\u503c&#xff0c;\u56e0\u4e3a\u6700\u540e\u8d4b\u503c\u7ed9data.c\u3002<\/p>\n<h5>\u8054\u5408\u4f53\u4e0e\u7ed3\u6784\u4f53\u7684\u4e0d\u540c<\/h5>\n<ul>\n<li>\u5185\u5b58\u4f7f\u7528&#xff1a;\u7ed3\u6784\u4f53\u7684\u5927\u5c0f\u8db3\u4ee5\u5bb9\u7eb3\u6240\u6709\u6210\u5458&#xff0c;\u6bcf\u4e2a\u6210\u5458\u90fd\u6709\u81ea\u5df1\u7684\u5185\u5b58\u7a7a\u95f4&#xff1b;\u800c\u8054\u5408\u4f53\u7684\u5927\u5c0f\u7b49\u4e8e\u5176\u6700\u5927\u7684\u6210\u5458\u5927\u5c0f&#xff0c;\u6240\u6709\u6210\u5458\u5171\u4eab\u8fd9\u4e00\u5757\u5185\u5b58\u7a7a\u95f4\u3002<\/li>\n<li>\u540c\u65f6\u5b58\u50a8\u7684\u6210\u5458&#xff1a;\u5728\u7ed3\u6784\u4f53\u4e2d&#xff0c;\u53ef\u4ee5\u540c\u65f6\u5b58\u50a8\u591a\u4e2a\u6210\u5458\u7684\u503c&#xff1b;\u5728\u8054\u5408\u4f53\u4e2d&#xff0c;\u4e00\u6b21\u53ea\u80fd\u5b58\u50a8\u4e00\u4e2a\u6210\u5458\u7684\u503c\u3002<\/li>\n<li>\u7528\u9014&#xff1a;\n<ul>\n<li>\u7ed3\u6784\u4f53\u7528\u4e8e\u5c06\u4e0d\u540c\u6216\u76f8\u540c\u7c7b\u578b\u7684\u6570\u636e\u9879\u7ec4\u7ec7\u6210\u4e00\u4e2a\u5355\u4e00\u5b9e\u4f53&#xff0c;\u5f53\u4f60\u9700\u8981\u4f7f\u7528\u6240\u6709\u6210\u5458\u65f6\u3002<\/li>\n<li>\u8054\u5408\u4f53\u5e38\u7528\u4e8e\u8282\u7701\u5185\u5b58&#xff0c;\u9002\u7528\u4e8e\u5b58\u50a8\u53ef\u80fd\u91c7\u7528\u591a\u79cd\u7c7b\u578b\u4e4b\u4e00\u7684\u6570\u636e&#xff0c;\u4f46\u5728\u4efb\u4e00\u65f6\u523b\u53ea\u4f7f\u7528\u4e00\u79cd\u7c7b\u578b\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u8054\u5408\u4f53\u5728\u7279\u5b9a\u60c5\u51b5\u4e0b\u975e\u5e38\u6709\u7528&#xff0c;\u4f8b\u5982&#xff0c;\u5f53\u4f60\u9700\u8981\u5b9a\u4e49\u4e00\u4e2a\u53ef\u4ee5\u5b58\u50a8\u591a\u79cd\u7c7b\u578b\u6570\u636e\u4f46\u540c\u65f6\u53ea\u4f7f\u7528\u4e00\u79cd\u7684\u53d8\u91cf\u65f6\u3002\u8fd9\u5728\u5904\u7406\u7cfb\u7edf\u8d44\u6e90\u53d7\u9650\u6216\u9700\u8981\u5bf9\u5185\u5b58\u4f7f\u7528\u8fdb\u884c\u4f18\u5316\u7684\u5d4c\u5165\u5f0f\u7cfb\u7edf\u7f16\u7a0b\u4e2d\u5c24\u5176\u91cd\u8981\u3002<\/p>\n<h4>9.\u8bf7\u89e3\u91caC\u8bed\u8a00\u4e2d\u7684\u9884\u5904\u7406\u5668\u6307\u4ee4&#xff0c;\u5e76\u7ed9\u51fa\u51e0\u4e2a\u5e38\u89c1\u7684\u9884\u5904\u7406\u5668\u6307\u4ee4\u793a\u4f8b\u3002<\/h4>\n<p>C\u8bed\u8a00\u4e2d\u7684\u9884\u5904\u7406\u5668\u662f\u4e00\u4e2a\u5728\u7f16\u8bd1\u4e4b\u524d\u6267\u884c\u7684\u7a0b\u5e8f&#xff0c;\u5b83\u5904\u7406\u6e90\u4ee3\u7801\u6587\u4ef6\u4e2d\u7684\u9884\u5904\u7406\u5668\u6307\u4ee4\u3002\u9884\u5904\u7406\u5668\u6307\u4ee4\u662f\u4ee5\u4e95\u53f7&#xff08;#&#xff09;\u5f00\u5934\u7684\u6307\u4ee4&#xff0c;\u5b83\u4eec\u4e0d\u662fC\u8bed\u8a00\u7684\u4e00\u90e8\u5206&#xff0c;\u800c\u662f\u5728\u7f16\u8bd1\u8fc7\u7a0b\u5f00\u59cb\u4e4b\u524d\u7531\u9884\u5904\u7406\u5668\u6267\u884c\u7684\u6307\u793a\u3002\u9884\u5904\u7406\u5668\u6307\u4ee4\u7528\u4e8e\u5305\u542b\u5934\u6587\u4ef6\u3001\u5b8f\u5b9a\u4e49\u3001\u6761\u4ef6\u7f16\u8bd1\u7b49\u3002<\/p>\n<h5>\u5e38\u89c1\u7684\u9884\u5904\u7406\u5668\u6307\u4ee4<\/h5>\n<li>#include &#8211; \u7528\u4e8e\u5305\u542b\u4e00\u4e2a\u6e90\u4ee3\u7801\u6587\u4ef6\u6216\u5e93\u7684\u5934\u6587\u4ef6\u3002\u5b83\u544a\u8bc9\u9884\u5904\u7406\u5668\u4ece\u6587\u4ef6\u7cfb\u7edf\u4e2d\u67e5\u627e\u5e76\u5305\u542b\u6307\u5b9a\u7684\u6587\u4ef6\u5185\u5bb9\u3002<\/li>\n<ul>\n<li>\u4f8b\u5982&#xff0c;#include &lt;stdio.h&gt;\u5305\u542b\u6807\u51c6\u8f93\u5165\u8f93\u51fa\u5934\u6587\u4ef6&#xff0c;#include &#034;myheader.h&#034;\u5305\u542b\u7528\u6237\u5b9a\u4e49\u7684\u5934\u6587\u4ef6\u3002<\/li>\n<\/ul>\n<li>#define &#8211; \u7528\u4e8e\u5b9a\u4e49\u5b8f\u3002\u5b8f\u662f\u4e00\u4e2a\u6807\u8bc6\u7b26&#xff0c;\u9884\u5904\u7406\u5668\u4f1a\u5728\u7f16\u8bd1\u4e4b\u524d\u5c06\u5176\u5c55\u5f00\u4e3a\u5b9a\u4e49\u7684\u5185\u5bb9\u3002<\/li>\n<ul>\n<li>\u4f8b\u5982&#xff0c;#define PI 3.14159\u5b9a\u4e49\u4e86PI\u4f5c\u4e3a3.14159\u7684\u5b8f\u3002<\/li>\n<\/ul>\n<li>#undef &#8211; \u7528\u4e8e\u53d6\u6d88\u5df2\u5b9a\u4e49\u7684\u5b8f\u3002<\/li>\n<ul>\n<li>\u4f8b\u5982&#xff0c;#undef PI\u53d6\u6d88\u4e86PI\u5b8f\u7684\u5b9a\u4e49\u3002<\/li>\n<\/ul>\n<li>\n<p>#if\u3001#else\u3001#elif\u3001#endif &#8211; \u8fd9\u4e9b\u6307\u4ee4\u7528\u4e8e\u6761\u4ef6\u7f16\u8bd1\u3002\u6839\u636e\u6761\u4ef6\u662f\u5426\u6ee1\u8db3&#xff0c;\u53ef\u4ee5\u5305\u542b\u6216\u6392\u9664\u4ee3\u7801\u6bb5\u3002<\/p>\n<ul>\n<li>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p> <span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">DEBUG<\/span> <span class=\"token expression\"><span class=\"token number\">1<\/span><\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">if<\/span> <span class=\"token expression\">DEBUG<\/span><\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Debug information\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">endif<\/span><\/span>\n <\/li>\n<\/ul>\n<\/li>\n<li>\n<p>#ifdef\u548c#ifndef &#8211; \u7528\u4e8e\u68c0\u67e5\u5b8f\u662f\u5426\u5df2\u5b9a\u4e49\u3002\u5982\u679c\u5b8f\u5df2\u5b9a\u4e49&#xff08;#ifdef&#xff09;\u6216\u672a\u5b9a\u4e49&#xff08;#ifndef&#xff09;&#xff0c;\u5219\u7f16\u8bd1\u968f\u540e\u7684\u4ee3\u7801\u3002<\/p>\n<ul>\n<li>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p> <span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">ifndef<\/span> <span class=\"token expression\">PI<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">PI<\/span> <span class=\"token expression\"><span class=\"token number\">3.14159<\/span><\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">endif<\/span><\/span>\n <\/li>\n<\/ul>\n<\/li>\n<li>\n<p>#pragma &#8211; \u7528\u4e8e\u63d0\u4f9b\u7f16\u8bd1\u5668\u7279\u5b9a\u7684\u6307\u4ee4&#xff0c;\u5176\u884c\u4e3a\u4f9d\u8d56\u4e8e\u7f16\u8bd1\u5668\u3002<\/p>\n<ul>\n<li>\u4f8b\u5982&#xff0c;#pragma once\u901a\u5e38\u7528\u4e8e\u5934\u6587\u4ef6&#xff0c;\u786e\u4fdd\u5934\u6587\u4ef6\u5185\u5bb9\u5728\u5355\u4e2a\u7f16\u8bd1\u4e2d\u53ea\u88ab\u5305\u542b\u4e00\u6b21\u3002<\/li>\n<\/ul>\n<\/li>\n<h5>\u9884\u5904\u7406\u5668\u6307\u4ee4\u7684\u4f5c\u7528<\/h5>\n<p>\u9884\u5904\u7406\u5668\u6307\u4ee4\u5728\u7f16\u8bd1\u4e4b\u524d\u5904\u7406&#xff0c;\u5b83\u4eec\u53ef\u4ee5\u7528\u6765&#xff1a;<\/p>\n<ul>\n<li>\u5305\u542b\u5176\u4ed6\u6587\u4ef6\u7684\u5185\u5bb9\u3002<\/li>\n<li>\u5b9a\u4e49\u5b8f&#xff0c;\u4ee5\u7b80\u5316\u91cd\u590d\u4ee3\u7801\u6216\u4e3a\u7f16\u8bd1\u63d0\u4f9b\u6761\u4ef6\u3002<\/li>\n<li>\u63a7\u5236\u6761\u4ef6\u7f16\u8bd1&#xff0c;\u6839\u636e\u4e0d\u540c\u7684\u6761\u4ef6\u7f16\u8bd1\u4e0d\u540c\u7684\u4ee3\u7801\u6bb5\u3002<\/li>\n<li>\u63d0\u4f9b\u7f16\u8bd1\u5668\u6307\u793a&#xff0c;\u5f71\u54cd\u7f16\u8bd1\u8fc7\u7a0b\u3002<\/li>\n<\/ul>\n<p>\u9884\u5904\u7406\u5668\u6781\u5927\u5730\u589e\u52a0\u4e86C\u8bed\u8a00\u7684\u7075\u6d3b\u6027\u548c\u529f\u80fd\u6027&#xff0c;\u4f7f\u5f97\u5f00\u53d1\u8005\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u7ba1\u7406\u4ee3\u7801&#xff0c;\u5904\u7406\u590d\u6742\u7684\u7f16\u8bd1\u4efb\u52a1&#xff0c;\u4ee5\u53ca\u9488\u5bf9\u4e0d\u540c\u7684\u7f16\u8bd1\u73af\u5883\u548c\u6761\u4ef6\u8fdb\u884c\u4f18\u5316\u3002<\/p>\n<h4>10.C\u8bed\u8a00\u4e2d\u7684\u6587\u4ef6\u64cd\u4f5c\u6709\u54ea\u4e9b&#xff1f;\u8bf7\u4e3e\u4f8b\u8bf4\u660e\u5982\u4f55\u6253\u5f00\u3001\u8bfb\u53d6\u548c\u5173\u95ed\u4e00\u4e2a\u6587\u4ef6\u3002<\/h4>\n<p>\u5728C\u8bed\u8a00\u4e2d&#xff0c;\u6587\u4ef6\u64cd\u4f5c\u662f\u901a\u8fc7\u6807\u51c6\u8f93\u5165\u8f93\u51fa\u5e93&#xff08;stdio.h&#xff09;\u63d0\u4f9b\u7684\u4e00\u7cfb\u5217\u51fd\u6570\u6765\u5b8c\u6210\u7684\u3002\u8fd9\u4e9b\u64cd\u4f5c\u5305\u62ec\u6253\u5f00\u6587\u4ef6\u3001\u8bfb\u53d6\u6587\u4ef6\u3001\u5199\u5165\u6587\u4ef6\u548c\u5173\u95ed\u6587\u4ef6\u7b49\u3002\u901a\u8fc7\u8fd9\u4e9b\u64cd\u4f5c&#xff0c;C\u7a0b\u5e8f\u53ef\u4ee5\u5904\u7406\u5b58\u50a8\u5728\u6587\u4ef6\u4e2d\u7684\u6570\u636e\u3002<\/p>\n<h5>\u5e38\u89c1\u7684\u6587\u4ef6\u64cd\u4f5c\u51fd\u6570<\/h5>\n<ul>\n<li>fopen()&#xff1a;\u6253\u5f00\u6587\u4ef6\u3002<\/li>\n<li>fprintf()\u3001fscanf()&#xff1a;\u5411\u6587\u4ef6\u5199\u5165\u6570\u636e\u548c\u4ece\u6587\u4ef6\u8bfb\u53d6\u6570\u636e\u3002<\/li>\n<li>fputc()\u3001fgetc()&#xff1a;\u5411\u6587\u4ef6\u5199\u5165\u5355\u4e2a\u5b57\u7b26\u548c\u4ece\u6587\u4ef6\u8bfb\u53d6\u5355\u4e2a\u5b57\u7b26\u3002<\/li>\n<li>fwrite()\u3001fread()&#xff1a;\u8fdb\u884c\u4e8c\u8fdb\u5236\u6570\u636e\u7684\u5199\u5165\u548c\u8bfb\u53d6\u3002<\/li>\n<li>fclose()&#xff1a;\u5173\u95ed\u6587\u4ef6\u3002<\/li>\n<\/ul>\n<h5>\u793a\u4f8b&#xff1a;\u6253\u5f00\u3001\u8bfb\u53d6\u548c\u5173\u95ed\u6587\u4ef6<\/h5>\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u540d\u4e3aexample.txt\u7684\u6587\u672c\u6587\u4ef6&#xff0c;\u6211\u4eec\u60f3\u8981\u8bfb\u53d6\u5176\u4e2d\u7684\u5185\u5bb9\u5e76\u6253\u5370\u5230\u63a7\u5236\u53f0\u3002<\/p>\n<h6>\u6253\u5f00\u6587\u4ef6<\/h6>\n<p>\u4f7f\u7528fopen()\u51fd\u6570\u6253\u5f00\u6587\u4ef6\u3002\u8fd9\u4e2a\u51fd\u6570\u9700\u8981\u4e24\u4e2a\u53c2\u6570&#xff1a;\u6587\u4ef6\u8def\u5f84\u548c\u6253\u5f00\u6a21\u5f0f&#xff08;\u5982&#034;r&#034;\u8868\u793a\u8bfb\u53d6\u6a21\u5f0f&#xff09;\u3002<\/p>\n<p>FILE <span class=\"token operator\">*<\/span>file <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">fopen<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;example.txt&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;r&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>file <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Failed to open the file\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u6216\u8005\u5904\u7406\u9519\u8bef<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h6>\u8bfb\u53d6\u6587\u4ef6<\/h6>\n<p>\u4f7f\u7528fgetc()\u51fd\u6570\u9010\u5b57\u7b26\u8bfb\u53d6\u6587\u4ef6&#xff0c;\u6216\u8005\u4f7f\u7528fgets()\u51fd\u6570\u8bfb\u53d6\u6574\u884c\u3002<\/p>\n<p><span class=\"token keyword\">char<\/span> ch<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span>ch <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">fgetc<\/span><span class=\"token punctuation\">(<\/span>file<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">!&#061;<\/span> <span class=\"token constant\">EOF<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/\/ EOF\u8868\u793a\u6587\u4ef6\u7ed3\u675f<\/span><br \/>\n    <span class=\"token function\">putchar<\/span><span class=\"token punctuation\">(<\/span>ch<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u6253\u5370\u5b57\u7b26\u5230\u63a7\u5236\u53f0<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u6216\u8005&#xff0c;\u8bfb\u53d6\u6574\u884c\u5230\u5b57\u7b26\u4e32&#xff1a;<\/p>\n<p><span class=\"token keyword\">char<\/span> buffer<span class=\"token punctuation\">[<\/span><span class=\"token number\">100<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">fgets<\/span><span class=\"token punctuation\">(<\/span>buffer<span class=\"token punctuation\">,<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">,<\/span> file<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">!&#061;<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%s&#034;<\/span><span class=\"token punctuation\">,<\/span> buffer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h6>\u5173\u95ed\u6587\u4ef6<\/h6>\n<p>\u4f7f\u7528fclose()\u51fd\u6570\u5173\u95ed\u6587\u4ef6\u3002<\/p>\n<p><span class=\"token function\">fclose<\/span><span class=\"token punctuation\">(<\/span>file<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h5>\u5b8c\u6574\u793a\u4f8b<\/h5>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    FILE <span class=\"token operator\">*<\/span>file<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> buffer<span class=\"token punctuation\">[<\/span><span class=\"token number\">100<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u6253\u5f00\u6587\u4ef6<\/span><br \/>\n    file <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">fopen<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;example.txt&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;r&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>file <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Failed to open the file\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u8bfb\u53d6\u5e76\u663e\u793a\u6587\u4ef6\u5185\u5bb9<\/span><br \/>\n    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">fgets<\/span><span class=\"token punctuation\">(<\/span>buffer<span class=\"token punctuation\">,<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">,<\/span> file<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">!&#061;<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%s&#034;<\/span><span class=\"token punctuation\">,<\/span> buffer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u5173\u95ed\u6587\u4ef6<\/span><br \/>\n    <span class=\"token function\">fclose<\/span><span class=\"token punctuation\">(<\/span>file<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8fd9\u4e2a\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u5728C\u8bed\u8a00\u4e2d\u6253\u5f00\u3001\u8bfb\u53d6\u548c\u5173\u95ed\u6587\u4ef6\u3002\u901a\u8fc7\u6587\u4ef6\u64cd\u4f5c&#xff0c;C\u7a0b\u5e8f\u80fd\u591f\u5904\u7406\u5916\u90e8\u6570\u636e&#xff0c;\u4f7f\u5176\u66f4\u52a0\u7075\u6d3b\u548c\u5f3a\u5927\u3002<\/p>\n<h4>11.\u5728C\u8bed\u8a00\u4e2d&#xff0c;\u5982\u4f55\u5b9e\u73b0\u5b57\u7b26\u4e32\u7684\u62fc\u63a5&#xff1f;<\/h4>\n<p>\u5728C\u8bed\u8a00\u4e2d&#xff0c;\u5b57\u7b26\u4e32\u662f\u4ee5\u5b57\u7b26\u6570\u7ec4\u7684\u5f62\u5f0f\u8868\u793a&#xff0c;\u5e76\u4ee5\u7a7a\u5b57\u7b26\\\\0\u4f5c\u4e3a\u7ed3\u675f\u6807\u5fd7\u3002\u5b57\u7b26\u4e32\u7684\u62fc\u63a5&#xff0c;\u5373\u5c06\u4e24\u4e2a\u5b57\u7b26\u4e32\u5408\u5e76\u4e3a\u4e00\u4e2a\u5b57\u7b26\u4e32&#xff0c;\u901a\u5e38\u4f7f\u7528\u6807\u51c6\u5e93\u51fd\u6570strcat()\u6765\u5b9e\u73b0\u3002\u6b64\u5916&#xff0c;\u4e3a\u4e86\u907f\u514d\u6ea2\u51fa&#xff0c;\u63a8\u8350\u4f7f\u7528strncat()&#xff0c;\u5b83\u5141\u8bb8\u6307\u5b9a\u6700\u5927\u62fc\u63a5\u957f\u5ea6\u3002<\/p>\n<h5>\u4f7f\u7528strcat()<\/h5>\n<p>strcat()\u51fd\u6570\u539f\u578b\u4f4d\u4e8estring.h\u5934\u6587\u4ef6\u4e2d&#xff0c;\u5176\u4f5c\u7528\u662f\u5c06\u6e90\u5b57\u7b26\u4e32&#xff08;source&#xff09;\u8ffd\u52a0\u5230\u76ee\u6807\u5b57\u7b26\u4e32&#xff08;destination&#xff09;\u7684\u672b\u5c3e&#xff0c;\u5e76\u8fd4\u56de\u6307\u5411\u76ee\u6807\u5b57\u7b26\u4e32\u7684\u6307\u9488\u3002<\/p>\n<p><span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span><span class=\"token function\">strcat<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>dest<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>src<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<ul>\n<li>dest&#xff1a;\u76ee\u6807\u5b57\u7b26\u4e32&#xff0c;\u5fc5\u987b\u6709\u8db3\u591f\u7684\u7a7a\u95f4\u6765\u5b58\u50a8\u8ffd\u52a0\u7684\u5185\u5bb9\u3002<\/li>\n<li>src&#xff1a;\u6e90\u5b57\u7b26\u4e32&#xff0c;\u5c06\u88ab\u8ffd\u52a0\u5230\u76ee\u6807\u5b57\u7b26\u4e32\u7684\u672b\u5c3e\u3002<\/li>\n<\/ul>\n<h6>\u793a\u4f8b&#xff1a;<\/h6>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> dest<span class=\"token punctuation\">[<\/span><span class=\"token number\">20<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;Hello, &#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> src<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;World!&#034;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u62fc\u63a5\u5b57\u7b26\u4e32<\/span><br \/>\n    <span class=\"token function\">strcat<\/span><span class=\"token punctuation\">(<\/span>dest<span class=\"token punctuation\">,<\/span> src<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Concatenated String: %s\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> dest<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h5>\u4f7f\u7528strncat()<\/h5>\n<p>strncat()\u662fstrcat()\u7684\u5b89\u5168\u7248\u672c&#xff0c;\u5b83\u5141\u8bb8\u6307\u5b9a\u6700\u5927\u62fc\u63a5\u7684\u5b57\u7b26\u6570&#xff0c;\u4ece\u800c\u907f\u514d\u6ea2\u51fa\u76ee\u6807\u6570\u7ec4\u3002<\/p>\n<p><span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span><span class=\"token function\">strncat<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>dest<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>src<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">size_t<\/span> n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<ul>\n<li>dest&#xff1a;\u76ee\u6807\u5b57\u7b26\u4e32\u3002<\/li>\n<li>src&#xff1a;\u6e90\u5b57\u7b26\u4e32\u3002<\/li>\n<li>n&#xff1a;\u6700\u5927\u4ece\u6e90\u5b57\u7b26\u4e32\u8ffd\u52a0\u7684\u5b57\u7b26\u6570\u3002<\/li>\n<\/ul>\n<h6>\u793a\u4f8b&#xff1a;<\/h6>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> dest<span class=\"token punctuation\">[<\/span><span class=\"token number\">20<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;Hello, &#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> src<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;World!&#034;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u5b89\u5168\u5730\u62fc\u63a5\u5b57\u7b26\u4e32&#xff0c;\u786e\u4fdd\u4e0d\u4f1a\u6ea2\u51fadest\u6570\u7ec4<\/span><br \/>\n    <span class=\"token function\">strncat<\/span><span class=\"token punctuation\">(<\/span>dest<span class=\"token punctuation\">,<\/span> src<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>dest<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span> <span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>dest<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Concatenated String: %s\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> dest<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d&#xff0c;strncat()\u786e\u4fdd\u76ee\u6807\u5b57\u7b26\u4e32dest\u6709\u8db3\u591f\u7684\u7a7a\u95f4\u6765\u8ffd\u52a0\u6e90\u5b57\u7b26\u4e32src&#xff0c;\u540c\u65f6\u907f\u514d\u6570\u7ec4\u6ea2\u51fa\u3002\u4f7f\u7528sizeof(dest) &#8211; strlen(dest) &#8211; 1\u8ba1\u7b97\u53ef\u4ee5\u5b89\u5168\u8ffd\u52a0\u7684\u6700\u5927\u5b57\u7b26\u6570&#xff0c;\u51cf1\u662f\u4e3a\u4e86\u4fdd\u7559\u7a7a\u5b57\u7b26\\\\0\u7684\u4f4d\u7f6e\u3002<\/p>\n<p>\u4f7f\u7528strcat()\u6216strncat()\u8fdb\u884c\u5b57\u7b26\u4e32\u62fc\u63a5\u65f6&#xff0c;\u5fc5\u987b\u786e\u4fdd\u76ee\u6807\u5b57\u7b26\u4e32\u6709\u8db3\u591f\u7684\u7a7a\u95f4\u6765\u5b58\u50a8\u8ffd\u52a0\u540e\u7684\u5b57\u7b26\u4e32&#xff0c;\u5426\u5219\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5185\u5b58\u6ea2\u51fa\u548c\u7a0b\u5e8f\u5d29\u6e83\u3002<\/p>\n<h4>12.\u8bf7\u63cf\u8ff0C\u8bed\u8a00\u4e2d\u7684switch\u8bed\u53e5&#xff0c;\u5e76\u4e0eif-else\u8bed\u53e5\u8fdb\u884c\u6bd4\u8f83\u3002<\/h4>\n<p>C\u8bed\u8a00\u4e2d\u7684switch\u8bed\u53e5\u662f\u4e00\u79cd\u591a\u5206\u652f\u9009\u62e9\u7ed3\u6784&#xff0c;\u5b83\u6839\u636e\u8868\u8fbe\u5f0f\u7684\u503c\u9009\u62e9\u6267\u884c\u7279\u5b9a\u7684\u4ee3\u7801\u5757\u3002switch\u8bed\u53e5\u901a\u5e38\u7528\u4e8e\u5f53\u6709\u591a\u4e2a\u6761\u4ef6\u5206\u652f\u65f6&#xff0c;\u4f5c\u4e3aif-else\u8bed\u53e5\u94fe\u7684\u4e00\u4e2a\u66f4\u6e05\u6670\u3001\u66f4\u6613\u4e8e\u7ba1\u7406\u7684\u66ff\u4ee3\u65b9\u6848\u3002<\/p>\n<h5>switch\u8bed\u53e5\u7684\u57fa\u672c\u8bed\u6cd5&#xff1a;<\/h5>\n<p><span class=\"token keyword\">switch<\/span> <span class=\"token punctuation\">(<\/span>expression<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">case<\/span> constant1<span class=\"token operator\">:<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u4ee3\u7801\u5757<\/span><br \/>\n        <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">case<\/span> constant2<span class=\"token operator\">:<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u4ee3\u7801\u5757<\/span><br \/>\n        <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><br \/>\n    <span class=\"token keyword\">default<\/span><span class=\"token operator\">:<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u9ed8\u8ba4\u4ee3\u7801\u5757<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<ul>\n<li>expression&#xff1a;\u8fd9\u662f\u4e00\u4e2a\u901a\u5e38\u8fd4\u56de\u6574\u578b\u6216\u5b57\u7b26\u578b\u7684\u8868\u8fbe\u5f0f&#xff0c;switch\u8bed\u53e5\u6839\u636e\u8fd9\u4e2a\u8868\u8fbe\u5f0f\u7684\u503c\u6765\u6267\u884c\u76f8\u5e94\u7684case\u5757\u3002<\/li>\n<li>case&#xff1a;\u540e\u8ddf\u4e00\u4e2a\u5e38\u91cf\u503c&#xff0c;\u5982\u679cexpression\u7684\u503c\u4e0ecase\u540e\u7684\u5e38\u91cf\u503c\u76f8\u5339\u914d&#xff0c;\u5219\u6267\u884c\u8be5case\u5757\u5185\u7684\u4ee3\u7801\u3002<\/li>\n<li>break&#xff1a;\u7528\u4e8e\u9000\u51faswitch\u8bed\u53e5\u3002\u5982\u679c\u6ca1\u6709break&#xff0c;\u7a0b\u5e8f\u5c06\u7ee7\u7eed\u6267\u884c\u4e0b\u4e00\u4e2acase\u7684\u4ee3\u7801&#xff0c;\u76f4\u5230\u9047\u5230break\u6216switch\u8bed\u53e5\u7ed3\u675f\u3002<\/li>\n<li>default&#xff1a;\u53ef\u9009\u7684&#xff0c;\u9ed8\u8ba4\u4ee3\u7801\u5757&#xff0c;\u5f53\u6ca1\u6709\u4efb\u4f55case\u5339\u914d\u65f6\u6267\u884c\u3002<\/li>\n<\/ul>\n<h5>switch\u8bed\u53e5\u4e0eif-else\u8bed\u53e5\u7684\u6bd4\u8f83<\/h5>\n<ul>\n<li>\u53ef\u8bfb\u6027&#xff1a;\u5bf9\u4e8e\u5904\u7406\u591a\u4e2a\u5177\u4f53\u503c\u7684\u6761\u4ef6\u5224\u65ad&#xff0c;switch\u8bed\u53e5\u901a\u5e38\u6bd4if-else\u94fe\u66f4\u6e05\u6670\u6613\u8bfb\u3002<\/li>\n<li>\u6548\u7387&#xff1a;\u5f53\u6709\u8bb8\u591a\u6761\u4ef6\u5206\u652f\u65f6&#xff0c;switch\u8bed\u53e5\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u53ef\u80fd\u6bd4if-else\u8bed\u53e5\u66f4\u9ad8\u6548&#xff0c;\u56e0\u4e3a\u7f16\u8bd1\u5668\u53ef\u80fd\u4f7f\u7528\u8df3\u8f6c\u8868\u6765\u4f18\u5316switch&#xff0c;\u800cif-else\u94fe\u5219\u9700\u8981\u9010\u4e2a\u6761\u4ef6\u5224\u65ad\u3002<\/li>\n<li>\u4f7f\u7528\u573a\u666f&#xff1a;\n<ul>\n<li>switch\u6700\u9002\u5408\u7528\u4e8e\u57fa\u4e8e\u5355\u4e2a\u53d8\u91cf\u7684\u591a\u4e2a\u56fa\u5b9a\u503c\u8fdb\u884c\u9009\u62e9\u3002<\/li>\n<li>if-else\u66f4\u7075\u6d3b&#xff0c;\u9002\u7528\u4e8e\u6761\u4ef6\u8303\u56f4\u66f4\u5e7f\u6cdb&#xff0c;\u5305\u62ec\u57fa\u4e8e\u8303\u56f4\u7684\u5224\u65ad\u3001\u903b\u8f91\u7ec4\u5408\u6761\u4ef6\u7b49\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u9650\u5236&#xff1a;\n<ul>\n<li>switch\u7684\u8868\u8fbe\u5f0f\u5fc5\u987b\u662f\u6574\u578b\u6216\u679a\u4e3e\u7c7b\u578b&#xff0c;\u4e14case\u540e\u9762\u8ddf\u7684\u5fc5\u987b\u662f\u5e38\u91cf\u8868\u8fbe\u5f0f\u3002<\/li>\n<li>if-else\u6ca1\u6709\u8fd9\u6837\u7684\u9650\u5236&#xff0c;\u53ef\u4ee5\u4f7f\u7528\u4efb\u4f55\u8fd4\u56de\u5e03\u5c14\u503c\u7684\u8868\u8fbe\u5f0f\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h5>\u793a\u4f8b<\/h5>\n<h6>\u4f7f\u7528switch<\/h6>\n<p><span class=\"token keyword\">int<\/span> num <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">switch<\/span> <span class=\"token punctuation\">(<\/span>num<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">case<\/span> <span class=\"token number\">1<\/span><span class=\"token operator\">:<\/span><br \/>\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;One\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">case<\/span> <span class=\"token number\">2<\/span><span class=\"token operator\">:<\/span><br \/>\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Two\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">default<\/span><span class=\"token operator\">:<\/span><br \/>\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Not One or Two\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h6>\u4f7f\u7528if-else<\/h6>\n<p><span class=\"token keyword\">int<\/span> num <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>num <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;One\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>num <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Two\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Not One or Two\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u603b\u7684\u6765\u8bf4&#xff0c;\u9009\u62e9switch\u8fd8\u662fif-else\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u4f7f\u7528\u573a\u666f\u3002\u5982\u679c\u662f\u57fa\u4e8e\u5355\u4e00\u53d8\u91cf\u7684\u591a\u503c\u5224\u65ad&#xff0c;switch\u53ef\u80fd\u662f\u66f4\u597d\u7684\u9009\u62e9&#xff1b;\u800c\u5bf9\u4e8e\u66f4\u590d\u6742\u7684\u6761\u4ef6\u5224\u65ad&#xff0c;\u5219\u53ef\u80fd\u9700\u8981\u4f7f\u7528if-else\u3002<\/p>\n<h4>13.C\u8bed\u8a00\u4e2d\u7684\u5faa\u73af\u8bed\u53e5\u6709\u54ea\u4e9b&#xff1f;\u8bf7\u5206\u522b\u7ed9\u51fa\u793a\u4f8b\u3002<\/h4>\n<p>C\u8bed\u8a00\u63d0\u4f9b\u4e86\u4e09\u79cd\u4e3b\u8981\u7684\u5faa\u73af\u63a7\u5236\u7ed3\u6784&#xff0c;\u4f7f\u5f97\u7a0b\u5e8f\u80fd\u591f\u91cd\u590d\u6267\u884c\u4e00\u6bb5\u4ee3\u7801\u5757&#xff0c;\u8fd9\u4e9b\u5faa\u73af\u8bed\u53e5\u5305\u62ec&#xff1a;<\/p>\n<li>for\u5faa\u73af&#xff1a;\u9002\u7528\u4e8e\u5f53\u4f60\u77e5\u9053\u9700\u8981\u5faa\u73af\u6267\u884c\u7684\u786e\u5207\u6b21\u6570\u65f6\u3002<\/li>\n<li>while\u5faa\u73af&#xff1a;\u9002\u7528\u4e8e\u5f53\u4f60\u9700\u8981\u5faa\u73af\u6267\u884c\u4ee3\u7801\u5757&#xff0c;\u4f46\u5faa\u73af\u6b21\u6570\u4e0d\u786e\u5b9a\u65f6\u3002<\/li>\n<li>do-while\u5faa\u73af&#xff1a;\u4e0ewhile\u5faa\u73af\u7c7b\u4f3c&#xff0c;\u4f46\u81f3\u5c11\u6267\u884c\u4e00\u6b21\u4ee3\u7801\u5757&#xff0c;\u4e4b\u540e\u518d\u68c0\u67e5\u5faa\u73af\u6761\u4ef6\u3002<\/li>\n<h5>1. for\u5faa\u73af<\/h5>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;i &#061; %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> i<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d&#xff0c;for\u5faa\u73af\u4ece0\u5f00\u59cb\u8ba1\u6570&#xff0c;\u76f4\u5230i\u5c0f\u4e8e5&#xff0c;\u6bcf\u6b21\u5faa\u73afi\u589e\u52a01\u3002<\/p>\n<h5>2. while\u5faa\u73af<\/h5>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span>i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;i &#061; %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> i<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8fd9\u4e2a\u4f8b\u5b50\u5c55\u793a\u4e86\u4e00\u4e2a\u57fa\u672c\u7684while\u5faa\u73af&#xff0c;\u5b83\u4f1a\u6301\u7eed\u6267\u884c\u5faa\u73af\u4f53&#xff0c;\u76f4\u5230i\u4e0d\u518d\u5c0f\u4e8e5\u3002<\/p>\n<h5>3. do-while\u5faa\u73af<\/h5>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">do<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;i &#061; %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> i<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span>i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d&#xff0c;do-while\u5faa\u73af\u81f3\u5c11\u6267\u884c\u4e00\u6b21\u6253\u5370\u64cd\u4f5c&#xff0c;\u7136\u540e\u518d\u68c0\u67e5\u6761\u4ef6i &lt; 5\u662f\u5426\u6ee1\u8db3\u3002\u8fd9\u610f\u5473\u7740\u5373\u4f7f\u5faa\u73af\u6761\u4ef6\u5f00\u59cb\u65f6\u4e0d\u6ee1\u8db3&#xff0c;\u5faa\u73af\u4f53\u7684\u4ee3\u7801\u4e5f\u4f1a\u6267\u884c\u81f3\u5c11\u4e00\u6b21\u3002<\/p>\n<h5>\u5faa\u73af\u7684\u9009\u62e9<\/h5>\n<ul>\n<li>\u5f53\u4f60\u77e5\u9053\u9700\u8981\u6267\u884c\u5faa\u73af\u7684\u786e\u5207\u6b21\u6570\u65f6&#xff0c;\u4f7f\u7528for\u5faa\u73af\u662f\u6700\u5408\u9002\u7684\u3002<\/li>\n<li>\u5982\u679c\u5faa\u73af\u6267\u884c\u7684\u6b21\u6570\u53d6\u51b3\u4e8e\u5faa\u73af\u5185\u90e8\u7684\u6761\u4ef6&#xff0c;\u800c\u4e0d\u662f\u4e00\u4e2a\u56fa\u5b9a\u7684\u6b21\u6570&#xff0c;\u90a3\u4e48while\u5faa\u73af\u53ef\u80fd\u66f4\u9002\u5408\u3002<\/li>\n<li>\u5982\u679c\u4f60\u9700\u8981\u786e\u4fdd\u5faa\u73af\u4f53\u5185\u7684\u4ee3\u7801\u81f3\u5c11\u6267\u884c\u4e00\u6b21&#xff0c;\u4e0d\u7ba1\u5faa\u73af\u6761\u4ef6\u6700\u521d\u662f\u5426\u4e3a\u771f&#xff0c;\u90a3\u4e48do-while\u5faa\u73af\u662f\u6b63\u786e\u7684\u9009\u62e9\u3002<\/li>\n<\/ul>\n<h4>14.\u89e3\u91ca\u4e00\u4e0b\u4ec0\u4e48\u662f\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u548c\u751f\u547d\u5468\u671f&#xff0c;\u5728C\u8bed\u8a00\u4e2d\u5b83\u4eec\u662f\u5982\u4f55\u4f53\u73b0\u7684&#xff1f;<\/h4>\n<p>\u5728C\u8bed\u8a00\u4e2d&#xff0c;\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u548c\u751f\u547d\u5468\u671f\u662f\u4e24\u4e2a\u91cd\u8981\u7684\u6982\u5ff5&#xff0c;\u5b83\u4eec\u5b9a\u4e49\u4e86\u53d8\u91cf\u5728\u4f55\u5904\u53ef\u88ab\u8bbf\u95ee&#xff08;\u4f5c\u7528\u57df&#xff09;\u4ee5\u53ca\u53d8\u91cf\u5b58\u5728\u591a\u957f\u65f6\u95f4&#xff08;\u751f\u547d\u5468\u671f&#xff09;\u3002<\/p>\n<h5>\u53d8\u91cf\u7684\u4f5c\u7528\u57df<\/h5>\n<p>\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u51b3\u5b9a\u4e86\u7a0b\u5e8f\u4e2d\u53ef\u4ee5\u8bbf\u95ee\u8be5\u53d8\u91cf\u7684\u533a\u57df\u3002\u5728C\u8bed\u8a00\u4e2d&#xff0c;\u4e3b\u8981\u6709\u4e24\u79cd\u7c7b\u578b\u7684\u4f5c\u7528\u57df&#xff1a;<\/p>\n<li>\n<p>\u5c40\u90e8\u4f5c\u7528\u57df&#xff1a;\u5c40\u90e8\u53d8\u91cf\u5728\u58f0\u660e\u5b83\u7684\u51fd\u6570\u6216\u4ee3\u7801\u5757\u5185\u90e8\u662f\u53ef\u89c1\u7684&#xff0c;\u5e76\u4e14\u53ea\u5728\u8be5\u51fd\u6570\u6216\u4ee3\u7801\u5757\u6267\u884c\u65f6\u5b58\u5728\u3002\u5b83\u4eec\u5728\u51fd\u6570\u6216\u4ee3\u7801\u5757\u7684\u5f00\u59cb\u5904\u521b\u5efa&#xff0c;\u5728\u7ed3\u675f\u65f6\u9500\u6bc1\u3002<\/p>\n<\/li>\n<li>\n<p>\u5168\u5c40\u4f5c\u7528\u57df&#xff1a;\u5168\u5c40\u53d8\u91cf\u5728\u7a0b\u5e8f\u7684\u4efb\u4f55\u4f4d\u7f6e\u90fd\u662f\u53ef\u89c1\u7684&#xff0c;\u4ece\u58f0\u660e\u70b9\u5f00\u59cb\u5230\u7a0b\u5e8f\u7ed3\u675f\u3002\u5b83\u4eec\u5728\u7a0b\u5e8f\u7684\u6267\u884c\u5f00\u59cb\u65f6\u521b\u5efa&#xff0c;\u5728\u7a0b\u5e8f\u7ed3\u675f\u65f6\u9500\u6bc1\u3002<\/p>\n<\/li>\n<h5>\u53d8\u91cf\u7684\u751f\u547d\u5468\u671f<\/h5>\n<p>\u53d8\u91cf\u7684\u751f\u547d\u5468\u671f\u662f\u6307\u53d8\u91cf\u4ece\u521b\u5efa\u5230\u9500\u6bc1\u7684\u65f6\u95f4\u6bb5\u3002\u53d8\u91cf\u7684\u751f\u547d\u5468\u671f\u4e0e\u5b83\u7684\u4f5c\u7528\u57df\u5bc6\u5207\u76f8\u5173&#xff1a;<\/p>\n<li>\n<p>\u5c40\u90e8\u53d8\u91cf\u7684\u751f\u547d\u5468\u671f\u901a\u5e38\u4e0e\u51fd\u6570\u8c03\u7528\u7684\u751f\u547d\u5468\u671f\u76f8\u540c\u3002\u5f53\u8fdb\u5165\u51fd\u6570\u65f6\u521b\u5efa\u5c40\u90e8\u53d8\u91cf&#xff0c;\u79bb\u5f00\u51fd\u6570\u65f6\u9500\u6bc1\u8fd9\u4e9b\u5c40\u90e8\u53d8\u91cf\u3002<\/p>\n<\/li>\n<li>\n<p>\u5168\u5c40\u53d8\u91cf\u7684\u751f\u547d\u5468\u671f\u4ece\u7a0b\u5e8f\u5f00\u59cb\u6267\u884c\u65f6\u521b\u5efa\u76f4\u5230\u7a0b\u5e8f\u7ed3\u675f\u65f6\u9500\u6bc1\u3002<\/p>\n<\/li>\n<h5>\u9759\u6001\u53d8\u91cf<\/h5>\n<p>\u9664\u4e86\u5c40\u90e8\u548c\u5168\u5c40\u4f5c\u7528\u57df&#xff0c;C\u8bed\u8a00\u8fd8\u6709\u9759\u6001\u53d8\u91cf\u7684\u6982\u5ff5&#xff0c;\u9759\u6001\u53d8\u91cf\u7684\u751f\u547d\u5468\u671f\u4ece\u7a0b\u5e8f\u5f00\u59cb\u76f4\u5230\u7a0b\u5e8f\u7ed3\u675f&#xff0c;\u4f46\u5b83\u4eec\u7684\u4f5c\u7528\u57df\u53ef\u4ee5\u662f\u5c40\u90e8\u7684\u6216\u5168\u5c40\u7684&#xff0c;\u53d6\u51b3\u4e8e\u5b83\u4eec\u7684\u58f0\u660e\u4f4d\u7f6e&#xff1a;<\/p>\n<ul>\n<li>\u5728\u51fd\u6570\u5185\u90e8\u58f0\u660e\u7684\u9759\u6001\u53d8\u91cf\u5177\u6709\u5c40\u90e8\u4f5c\u7528\u57df&#xff0c;\u4f46\u5b83\u4eec\u4e0d\u50cf\u666e\u901a\u7684\u5c40\u90e8\u53d8\u91cf\u90a3\u6837\u5728\u51fd\u6570\u8c03\u7528\u7ed3\u675f\u65f6\u9500\u6bc1\u3002\u76f8\u53cd&#xff0c;\u5b83\u4eec\u7684\u503c\u5728\u51fd\u6570\u8c03\u7528\u4e4b\u95f4\u4fdd\u6301\u4e0d\u53d8\u3002<\/li>\n<li>\u5728\u51fd\u6570\u5916\u90e8\u58f0\u660e\u7684\u9759\u6001\u53d8\u91cf\u5177\u6709\u6587\u4ef6\u4f5c\u7528\u57df&#xff0c;\u4ec5\u5728\u58f0\u660e\u5b83\u4eec\u7684\u6587\u4ef6\u5185\u53ef\u89c1\u3002<\/li>\n<\/ul>\n<h5>\u793a\u4f8b<\/h5>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> globalVar <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5168\u5c40\u53d8\u91cf<\/span><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">demoFunction<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> localVar <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5c40\u90e8\u53d8\u91cf<\/span><br \/>\n    <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> staticVar <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">50<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u9759\u6001\u5c40\u90e8\u53d8\u91cf<\/span><\/p>\n<p>    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Local: %d, Static: %d, Global: %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> localVar<span class=\"token punctuation\">,<\/span> staticVar<span class=\"token punctuation\">,<\/span> globalVar<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    localVar<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    staticVar<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">demoFunction<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u7b2c\u4e00\u6b21\u8c03\u7528<\/span><br \/>\n    <span class=\"token function\">demoFunction<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u7b2c\u4e8c\u6b21\u8c03\u7528<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d&#xff1a;<\/p>\n<ul>\n<li>localVar\u662f\u4e00\u4e2a\u5c40\u90e8\u53d8\u91cf&#xff0c;\u6bcf\u6b21\u8c03\u7528demoFunction\u65f6\u90fd\u4f1a\u91cd\u65b0\u521d\u59cb\u5316\u3002<\/li>\n<li>staticVar\u662f\u4e00\u4e2a\u9759\u6001\u5c40\u90e8\u53d8\u91cf&#xff0c;\u5b83\u5728\u7b2c\u4e00\u6b21\u8c03\u7528demoFunction\u65f6\u521d\u59cb\u5316&#xff0c;\u5e76\u5728\u968f\u540e\u7684\u8c03\u7528\u4e2d\u4fdd\u6301\u5176\u503c\u3002<\/li>\n<li>globalVar\u662f\u4e00\u4e2a\u5168\u5c40\u53d8\u91cf&#xff0c;\u5b83\u5728\u6574\u4e2a\u7a0b\u5e8f\u4e2d\u90fd\u662f\u53ef\u89c1\u7684\u3002<\/li>\n<\/ul>\n<p>\u901a\u8fc7\u8fd9\u4e9b\u6982\u5ff5&#xff0c;C\u8bed\u8a00\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u673a\u5236\u6765\u63a7\u5236\u53d8\u91cf\u7684\u53ef\u89c1\u6027\u548c\u751f\u547d\u5468\u671f&#xff0c;\u4ece\u800c\u5e2e\u52a9\u7a0b\u5e8f\u5458\u7f16\u5199\u66f4\u52a0\u6a21\u5757\u5316\u548c\u6613\u4e8e\u7ba1\u7406\u7684\u4ee3\u7801\u3002<\/p>\n<h4>15. \u8bf7\u63cf\u8ff0C\u8bed\u8a00\u4e2d\u7684\u52a8\u6001\u5185\u5b58\u5206\u914d&#xff0c;\u5e76\u4e3e\u4f8b\u8bf4\u660e\u5176\u5e94\u7528\u573a\u666f\u3002<\/h4>\n<p>\u5728C\u8bed\u8a00\u4e2d&#xff0c;\u52a8\u6001\u5185\u5b58\u5206\u914d\u662f\u4e00\u79cd\u5728\u7a0b\u5e8f\u8fd0\u884c\u65f6&#xff08;\u800c\u4e0d\u662f\u5728\u7f16\u8bd1\u65f6&#xff09;\u5206\u914d\u5185\u5b58\u7684\u673a\u5236\u3002\u8fd9\u5141\u8bb8\u7a0b\u5e8f\u6839\u636e\u9700\u8981\u5206\u914d\u548c\u91ca\u653e\u5185\u5b58&#xff0c;\u63d0\u9ad8\u4e86\u5185\u5b58\u4f7f\u7528\u7684\u7075\u6d3b\u6027\u548c\u6548\u7387\u3002C\u8bed\u8a00\u6807\u51c6\u5e93\u4e2d\u7684stdlib.h\u5934\u6587\u4ef6\u63d0\u4f9b\u4e86\u51e0\u4e2a\u7528\u4e8e\u52a8\u6001\u5185\u5b58\u5206\u914d\u7684\u51fd\u6570&#xff0c;\u5305\u62ecmalloc()\u3001calloc()\u3001realloc()\u548cfree()\u3002<\/p>\n<h5>\u52a8\u6001\u5185\u5b58\u5206\u914d\u7684\u51fd\u6570<\/h5>\n<li>\n<p>malloc(size_t size)&#xff1a;\u5206\u914dsize\u5b57\u8282\u7684\u5185\u5b58\u7a7a\u95f4&#xff0c;\u5e76\u8fd4\u56de\u6307\u5411\u8be5\u5185\u5b58\u7684\u6307\u9488\u3002\u5206\u914d\u7684\u5185\u5b58\u672a\u521d\u59cb\u5316&#xff0c;\u53ef\u80fd\u5305\u542b\u5783\u573e\u503c\u3002<\/p>\n<\/li>\n<li>\n<p>calloc(size_t num, size_t size)&#xff1a;\u5206\u914dnum\u4e2a\u5927\u5c0f\u4e3asize\u7684\u8fde\u7eed\u7a7a\u95f4&#xff0c;\u5e76\u8fd4\u56de\u6307\u5411\u8be5\u5185\u5b58\u7684\u6307\u9488\u3002\u5206\u914d\u7684\u5185\u5b58\u521d\u59cb\u5316\u4e3a\u96f6\u3002<\/p>\n<\/li>\n<li>\n<p>realloc(void *ptr, size_t size)&#xff1a;\u8c03\u6574\u4e4b\u524d\u8c03\u7528malloc\u6216calloc\u5206\u914d\u7684\u5185\u5b58\u5757\u7684\u5927\u5c0f\u3002\u5b83\u5c06\u5185\u5b58\u5757\u7684\u5927\u5c0f\u6539\u53d8\u4e3asize\u5b57\u8282&#xff0c;\u5e76\u8fd4\u56de\u6307\u5411\u8fd9\u5757\u65b0\u5185\u5b58\u7684\u6307\u9488\u3002\u5982\u679cptr\u662fNULL&#xff0c;realloc\u5c31\u50cfmalloc\u4e00\u6837\u5de5\u4f5c\u3002<\/p>\n<\/li>\n<li>\n<p>free(void *ptr)&#xff1a;\u91ca\u653e\u4e4b\u524d\u901a\u8fc7malloc\u3001calloc\u6216realloc\u5206\u914d\u7684\u5185\u5b58\u5757\u3002\u4e00\u65e6\u5185\u5b58\u88ab\u91ca\u653e&#xff0c;\u8be5\u6307\u9488ptr\u5c31\u4e0d\u5e94\u518d\u88ab\u4f7f\u7528\u3002<\/p>\n<\/li>\n<h5>\u5e94\u7528\u573a\u666f<\/h5>\n<p>\u52a8\u6001\u5185\u5b58\u5206\u914d\u5728\u8bb8\u591a\u573a\u666f\u4e2d\u90fd\u975e\u5e38\u6709\u7528&#xff0c;\u7279\u522b\u662f\u5f53\u4f60\u65e0\u6cd5\u9884\u5148\u77e5\u9053\u9700\u8981\u591a\u5c11\u5185\u5b58\u6216\u6570\u636e\u96c6\u7684\u5927\u5c0f\u5728\u8fd0\u884c\u65f6\u53ef\u80fd\u53d1\u751f\u53d8\u5316\u65f6\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5178\u578b\u7684\u5e94\u7528\u573a\u666f&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u5904\u7406\u53ef\u53d8\u5927\u5c0f\u7684\u6570\u636e\u7ed3\u6784&#xff1a;\u4f8b\u5982&#xff0c;\u52a8\u6001\u6570\u7ec4\u3001\u94fe\u8868\u3001\u6811\u7b49\u6570\u636e\u7ed3\u6784\u5728\u5143\u7d20\u589e\u52a0\u6216\u5220\u9664\u65f6\u9700\u8981\u8c03\u6574\u5185\u5b58\u4f7f\u7528\u3002<\/p>\n<\/li>\n<li>\n<p>\u8bfb\u53d6\u672a\u77e5\u5927\u5c0f\u7684\u6587\u4ef6&#xff1a;\u5f53\u4f60\u9700\u8981\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\u4f46\u6587\u4ef6\u5927\u5c0f\u672a\u77e5\u65f6&#xff0c;\u53ef\u4ee5\u52a8\u6001\u5206\u914d\u5185\u5b58\u4ee5\u5b58\u50a8\u6587\u4ef6\u6570\u636e\u3002<\/p>\n<\/li>\n<li>\n<p>\u9ad8\u6548\u7684\u5185\u5b58\u4f7f\u7528&#xff1a;\u901a\u8fc7\u53ea\u5728\u9700\u8981\u65f6\u5206\u914d\u5185\u5b58&#xff0c;\u52a8\u6001\u5185\u5b58\u5206\u914d\u5e2e\u52a9\u51cf\u5c11\u4e86\u9759\u6001\u5206\u914d\u53ef\u80fd\u5bfc\u81f4\u7684\u5185\u5b58\u6d6a\u8d39\u3002<\/p>\n<\/li>\n<\/ul>\n<h5>\u793a\u4f8b&#xff1a;\u4f7f\u7528malloc\u548cfree<\/h5>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdlib.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> <span class=\"token operator\">*<\/span>arr<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> n <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5047\u8bbe\u6211\u4eec\u9700\u8981\u4e00\u4e2a\u5927\u5c0f\u4e3a5\u7684\u6574\u6570\u6570\u7ec4<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u52a8\u6001\u5206\u914d\u5185\u5b58<\/span><br \/>\n    arr <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token function\">malloc<\/span><span class=\"token punctuation\">(<\/span>n <span class=\"token operator\">*<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>arr <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">fprintf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token constant\">stderr<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;Memory allocation failed\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u4f7f\u7528\u6570\u7ec4<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> n<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> i <span class=\"token operator\">*<\/span> i<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%d &#034;<\/span><span class=\"token punctuation\">,<\/span> arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u91ca\u653e\u5185\u5b58<\/span><br \/>\n    <span class=\"token function\">free<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d&#xff0c;\u6211\u4eec\u4f7f\u7528malloc\u52a8\u6001\u5206\u914d\u4e86\u4e00\u4e2a\u6574\u6570\u6570\u7ec4&#xff0c;\u5e76\u4f7f\u7528\u5faa\u73af\u521d\u59cb\u5316\u6570\u7ec4\u3002\u5728\u6570\u7ec4\u4e0d\u518d\u9700\u8981\u65f6&#xff0c;\u4f7f\u7528free\u91ca\u653e\u4e86\u5206\u914d\u7684\u5185\u5b58\u3002\u8fd9\u79cd\u65b9\u5f0f\u786e\u4fdd\u4e86\u7a0b\u5e8f\u4ec5\u4ec5\u4f7f\u7528\u5fc5\u8981\u7684\u5185\u5b58&#xff0c;\u5e76\u4e14\u80fd\u591f\u6709\u6548\u5730\u7ba1\u7406\u5185\u5b58\u8d44\u6e90\u3002<\/p>\n<p>\u7531\u4e8e\u5185\u5bb9\u592a\u591a&#xff0c;\u66f4\u591a\u5185\u5bb9\u4ee5\u94fe\u63a5\u5f62\u52bf\u7ed9\u5927\u5bb6&#xff0c;\u70b9\u51fb\u8fdb\u53bb\u5c31\u662f\u7b54\u6848\u4e86<\/p>\n<p>16. \u5728C\u8bed\u8a00\u4e2d&#xff0c;\u5982\u4f55\u5224\u65ad\u4e00\u4e2a\u6570\u662f\u5426\u4e3a\u7d20\u6570&#xff1f;<\/p>\n<p>17. 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