function
<cwctype>

iswupper

int iswupper (wint_t c);
Check if wide character is uppercase letter
Checks whether c is an uppercase letter.

Notice that what is considered a letter may depend on the locale being used.

This function is the wide-character equivalent of isupper (<cctype>): If c translates with wctob to a character for which isupper is true, it is always considered an uppercase letter character by this function too.

In C++, a locale-specific template version of this function (isupper) 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 an uppercase letter. Zero (i.e., false) otherwise.

Example

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/* iswlower example */
#include <stdio.h>
#include <wctype.h>
int main ()
{
  int i=0;
  wchar_t str[] = L"Test String.\n";
  wchar_t c;
  while (str[i])
  {
    c = str[i];
    if (iswupper(c)) c=towlower(c);
    putwchar (c);
    i++;
  }
  return 0;
}


Output:
test string.

See also

isupper
Check if character is uppercase letter (function )
iswlower
Check if wide character is lowercase letter (function )
iswalpha
Check if wide character is alphabetic (function )
towupper
Convert lowercase wide character to uppercase (function )
towlower
Convert uppercase wide character to lowercase (function )
isupper (locale)
Check if character is an uppercase letter using locale (function template )

C++