function
<cwctype>
iswxdigit
int iswxdigit (wint_t c);
Check if wide character is hexadecimal digit
Checks whether c is a hexadecimal digit character.
A hexadecimal digit is any of: 0 1 2 3 4 5 6 7 8 9 a b c d e f A B C D E F
This function is the wide-character equivalent of isxdigit (<cctype>): If c translates with wctob to a character for which isxdigit is true, it is always considered a hexadecimal digit character by this function too.
In C++, a locale-specific template version of this function (isxdigit) exists in header <locale> for all character types.
Parameters
- c
- Wide character to be checked, casted to a wint_t, or WEOF.
wint_t is an integral type.
Return Value
A value different from zero (i.e., true) if indeed c is a hexadecimal digit. Zero (i.e., false) otherwise.
Example
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
|
/* isxdigit example */
#include <stdio.h>
#include <wchar.h>
#include <wctype.h>
int main ()
{
wchar_t str[] = L"ffff";
long int number;
if (iswxdigit(str[0]))
{
number = wcstol (str,NULL,16);
wprintf (L"The hexadecimal number %lx is %ld.\n",number,number);
}
return 0;
}
| |
Output:
The hexadecimal number ffff is 65535.
|
See also
- isxdigit
- Check if character is hexadecimal digit (function
)
- iswdigit
- Check if wide character is decimal digit (function
)
- iswalnum
- Check if wide character is alphanumeric (function
)
- isxdigit (locale)
- Check if character is hexadecimal digit using locale (function template
)