mirror of
https://github.com/fofolee/uTools-Manuals.git
synced 2025-06-08 15:04:05 +08:00
37 lines
1.1 KiB
HTML
37 lines
1.1 KiB
HTML
<h1>字符函数 - isspace</h1>
|
||
|
||
|
||
<p>原型：extern int isspace(int c);</p>
|
||
|
||
<p>用法：#include <ctype.h></p>
|
||
|
||
<p>功能：判断字符c是否为空白符</p>
|
||
|
||
<p>说明：当c为空白符时，返回非零值，否则返回零。</p>
|
||
空白符指空格、水平制表、垂直制表、换页、回车和换行符。
|
||
|
||
举例：<pre><code class="language-c">
|
||
|
||
// isspace.c
|
||
|
||
#include <syslib.h>
|
||
#include <ctype.h>
|
||
|
||
main()
|
||
{
|
||
char s[]="Test Line 1\tend\nTest Line 2\r";
|
||
int i;
|
||
|
||
clrscr(); // clear screen
|
||
for(i=0;i<strlen(s);i++)
|
||
{
|
||
if(isspace(s[i])) putchar('.');
|
||
else putchar(s[i]);
|
||
}
|
||
getchar();
|
||
return 0;
|
||
}
|
||
|
||
</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="ispunct.html">ispunct</a>
|
||
|