?? isxdigit.html
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請選定要查看的函數
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<ul>
<li><a href="isalnum.html">isalnum</a></li>
<li><a href="isalpha.html">isalpha</a></li>
<li><a href="iscntrl.html">iscntrl</a></li>
<li><a href="isdigit.html">isdigit</a></li>
<li><a href="islower.html">islower</a></li>
<li><a href="isascii.html">isascii</a></li>
<li><a href="isgraph.html">isgraph</a></li>
<li><a href="isprint.html">isprint</a></li>
<li><a href="ispunct.html">ispunct</a></li>
<li><a href="isspace.html">isspace</a></li>
<li><a href="isupper.html">isupper</a></li>
<font color=red>
<li><a href="isxdigit.html">isxdigit</a></li>
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<li><a href="toascii.html">toascii</a></li>
<li><a href="tolower.html">tolower</a></li>
<li><a href="toupper.html">toupper</a></li>
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<td>目前共有15個函數</td>
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<tr><td height=62 valign=bottom><b><font size=5>isxdigit</font></b></td></tr>
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<pre>
原型：extern int isxdigit(int c);
用法：#include <ctype.h>
功能：判斷字符c是否為十六進制數字
說明：當c為A-F,a-f或0-9之間的十六進制數字時，返回非零值，否則返回零。
舉例：
// isxdigit.c
#include <syslib.h>
#include <ctype.h>
main()
{
int c;
clrscr(); // clear screen
c='a';
printf("%c:%s\n",c,isxdigit(c)?"yes":"no");
c='9';
printf("%c:%s\n",c,isxdigit(c)?"yes":"no");
c='*';
printf("%c:%s\n",c,isxdigit(c)?"yes":"no");
getchar();
return 0;
}
相關函數：<a href="isalnum.html">isalnum</a>,<a href="isalpha.html">isalpha</a>,<a href="isdigit.html">isdigit</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>,<a href=isspace.html">isspace</a>
</pre>
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