wint_t towupper (wint_t c);
Convert lowercase wide character to uppercase
Converts c to its uppercase equivalent if c is a lowercase letter and has an uppercase equivalent. If no such conversion is possible, the value returned is c unchanged.
Notice that what is considered a letter may depend on the locale being used.
If a lowercase character has more than one correspondent uppercase character, this function always returns the same character for the same value of c.
This function is the wide-character equivalent of toupper (<cctype>).
In C++, a locale-specific template version of this function (toupper) exists in header <locale> for all character types.
- Wide character to be converted, casted to a wint_t value, or WEOF.
wint_t is an integral type.
The uppercase equivalent to c, if such value exists, or c (unchanged) otherwise.
The value is returned as a wint_t value that can be implicitly casted to wchar_t.
/* towupper example */
int main ()
wchar_t str = L"Test String.\n";
c = str[i];
- Convert lowercase letter to uppercase (function
- Convert uppercase wide character to lowercase (function
- Check if wide character is uppercase letter (function
- Check if wide character is lowercase letter (function
- Check if wide character is alphabetic (function
- toupper (locale)
- Convert lowercase letter to uppercase using locale (function template