isxdigit, iswxdigit
Remonter à Ctype.h - Index
Header File
ctype.h, wctype.h
Category
Classification Routines
Prototype
int isxdigit(int c);
int iswxdigit(wint_t c);
Description
Tests for hexadecimal character.
isxdigit is a macro that classifies ASCII-coded integer values by table lookup. The macro is affected by the current locale’s LC_CTYPE category.
You can make this macro available as a function by undefining (#undef) it.
Return Value
isxdigit returns nonzero if c is a hexadecimal digit (0 to 9, A to F, a to f) or any other hexadecimal digit defined by the locale.
Example
#include <stdio.h>
#include <ctype.h>
int main(void)
{
char c = 'C';
if (isxdigit(c))
printf("%c is a hexadecimal digit\n",c);
else
printf("%c is not a hexadecimal digit\n",c);
return 0;
}
Portability
POSIX | Win32 | ANSI C | ANSI C++ | |
---|---|---|---|---|
isxdigit |
+ |
+ |
+ |
+ |
iswxdigit |
+ |
+ |
+ |