function
<cwctype>
iswdigit
Check if wide character is decimal digit
Checks whether c is a decimal digit character.
A decimal digit is any of: 0 1 2 3 4 5 6 7 8 9
This function is the wide-character equivalent of isdigit (<cctype>): If c translates with wctob to a character for which isdigit is true, it is always considered a decimal digit character by this function too.
In C++, a locale-specific template version of this function (isdigit) 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 decimal digit. Zero (i.e., false) otherwise.
Example
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/* iswdigit example */
#include <stdio.h>
#include <wchar.h>
#include <wctype.h>
int main ()
{
wchar_t str[] = L"1776ad";
long int year;
if (iswdigit(str[0]))
{
year = wcstol (str,NULL,10);
wprintf (L"The year that followed %ld was %ld.\n",year,year+1);
}
return 0;
}
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Output:
The year 1777 followed 1776
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See also
- isdigit
- Check if character is decimal digit (function)
- iswxdigit
- Check if wide character is hexadecimal digit (function)
- iswalnum
- Check if wide character is alphanumeric (function)
- iswalpha
- Check if wide character is alphabetic (function)
- isdigit (locale)
- Check if character is a decimal digit using locale (function template)