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towupper

From cppreference.com
< c‎ | string‎ | wide
Defined in header <wctype.h>
wint_t towupper( wint_t ch );
(since C95)

Converts the given wide character to uppercase, if possible.

Contents

[edit] Parameters

ch - wide character to be converted

[edit] Return value

Uppercase version of ch or unmodified ch if no uppercase version is listed in the current C locale.

[edit] Notes

Only 1:1 character mapping can be performed by this function, e.g. the uppercase form of 'ß' is (with some exceptions) the two-character string "SS", which cannot be obtained by towupper.

[edit] Example

#include <stdio.h>
#include <wchar.h>
#include <wctype.h>
#include <locale.h>
 
int main(void)
{
    wchar_t c =  L'\u017f'; // Latin small letter Long S ('ſ')
    printf("in the default locale, towupper(%#x) = %#x\n", c, towupper(c));
    setlocale(LC_ALL, "en_US.utf8");
    printf("in Unicode locale, towupper(%#x) = %#x\n", c, towupper(c));
}

Output:

in the default locale, towupper(0x17f) = 0x17f
in Unicode locale, towupper(0x17f) = 0x53

[edit] See also

converts a wide character to lowercase
(function) [edit]
converts a character to uppercase
(function) [edit]
C++ documentation for towupper