6.24.20 towupper Function

Convert a wide character to an uppercase alphabetical wide character.

Include

<wctype.h>

Prototype

int towupper(wint_t wc);

Argument

wc

The wide character to convert.

Return Value

Returns the corresponding uppercase alphabetical wide character if the argument, wc, was originally lowercase; otherwise, returns the original wide character.

Remarks

Only lowercase alphabetical wide characters may be converted to uppercase.

Example

See the notes at the beginning of this chapter or section for information on using printf() or scanf() (and other functions reading and writing the stdin or stdout streams) in the example code.

#include <wctype.h>
#include <wchar.h>
#include <stdio.h>

int main(void)
{
	wchar_t wStr[] = L"A string, 2 wide 4 some.\n";
	wint_t wc;
	unsigned idx = 0;

	printf("String in upper case: ");
	do {
		wc = wStr[idx];
		putwchar(towupper(wc));
		idx++;
	} while(wStr[idx]);
	printf("\n");
}

Example Output

String in upper case: A STRING, 2 WIDE 4 SOME.