mirror of
https://github.com/fofolee/uTools-Manuals.git
synced 2025-06-08 15:04:05 +08:00
37 lines
875 B
HTML
37 lines
875 B
HTML
<h1>字符函数 - isprint</h1>
|
||
|
||
|
||
<p>原型：extern int isprint(int c);</p>
|
||
|
||
<p>用法：#include <ctype.h></p>
|
||
|
||
<p>功能：判断字符c是否为可打印字符（含空格）</p>
|
||
|
||
<p>说明：当c为可打印字符（0x20-0x7e）时，返回非零值，否则返回零。</p>
|
||
|
||
举例：<pre><code class="language-c">
|
||
|
||
// isprint.c
|
||
|
||
#include <syslib.h>
|
||
#include <ctype.h>
|
||
|
||
main()
|
||
{
|
||
int c;
|
||
|
||
clrscr(); // clear screen
|
||
c='a';
|
||
printf("%c:%s\n",c,isprint(c)?"yes":"no");
|
||
c=' ';
|
||
printf("%c:%s\n",c,isprint(c)?"yes":"no");
|
||
c=0x7f;
|
||
printf("%c:%s\n",c,isprint(c)?"yes":"no");
|
||
|
||
getchar();
|
||
return 0;
|
||
}
|
||
|
||
</code></pre>相关函数：<a href="isgraph.html">isgraph</a>
|
||
|