Conversion from lower-case to upper-case

[Classification]

Standard library

[Syntax]

#include <ctype.h>

int __far toupper(int c);

[Return value]

If islower is true with respect to c, returns a character that makes isupper true in response; otherwise, returns c.

[Description]

This function is a macro that converts lowercase characters into the corresponding uppercase characters and leaves the other characters unchanged.