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37 lines
1.1 KiB
HTML
37 lines
1.1 KiB
HTML
<h1>字符函数 - isspace</h1>
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<p>原型：extern int isspace(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是否为空白符</p>
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<p>说明：当c为空白符时，返回非零值，否则返回零。</p>
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空白符指空格、水平制表、垂直制表、换页、回车和换行符。
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举例：<pre>
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// isspace.c
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#include <syslib.h>
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#include <ctype.h>
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main()
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{
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char s[]="Test Line 1\tend\nTest Line 2\r";
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int i;
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clrscr(); // clear screen
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for(i=0;i<strlen(s);i++)
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{
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if(isspace(s[i])) putchar('.');
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else putchar(s[i]);
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}
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getchar();
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return 0;
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}
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</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="ispunct.html">ispunct</a>
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