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41 lines
1.2 KiB
HTML
41 lines
1.2 KiB
HTML
<h1>字符函数 - ispunct</h1>
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<p>原型：extern int ispunct(int c);</p>
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<p>用法：#include <ctype.h></p>
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<p>功能：判断字符c是否为标点符号</p>
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<p>说明：当c为标点符号时，返回非零值，否则返回零。
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标点符号指那些既不是字母数字，也不是空格的可打印字符。</p>
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举例：<pre><code class="language-c">
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// ispunct.c
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#include <syslib.h>
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#include <ctype.h>
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#include <string.h>
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main()
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{
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char s[]="Hello, Rain!";
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int i;
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clrscr(); // clear screen
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printf("%s\n",s);
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for(i=0;i<strlen(s);i++)
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{
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if(ispunct(s[i])) printf("^");
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else printf(".");
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}
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getchar();
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return 0;
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}
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</code></pre>相关函数：<a href="isalnum.html">isalnum</a>,<a href="isalpha.html">isalpha</a>,<a href="isdigit.html">isdigit</a>,<a href="isxdigit.html">isxdigit</a>,<a href="iscntrl.html">iscntrl</a>,<a href="isgraph.html">isgraph</a>,<a href="isprint.html">isprint</a>,<a href=isspace.html">isspace</a>
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