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31 lines
788 B
HTML
31 lines
788 B
HTML
<h1>字符函数 - isgraph</h1>
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<p>原型：extern int isgraph(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是否为除空格外的可打印字符<p>
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<p>说明：当c为可打印字符（0x21-0x7e）时，返回非零值，否则返回零。<p>
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举例：
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<pre><code class="language-c">
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// isgraph.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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int c;
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clrscr(); // clear screen
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c='a';
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printf("%c:%s\n",c,isgraph(c)?"yes":"no");
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c=' '; // 0x20
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printf("%c:%s\n",c,isgraph(c)?"yes":"no");
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c=0x7f;
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printf("%c:%s\n",c,isgraph(c)?"yes":"no");
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getchar();
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return 0;
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}
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</code></pre>
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相关函数：<a href="isprint.html">isprint</a>
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