towupper

Header file:

    wctype.h

Synopsis:
    wint_t towupper (wint_t input)

Description:
     If input is in lower case letter, it returns the corresponding upper case letter. Otherwise input is returned unchanged.

Sample program for towupper in C:

---

  #include <stdio.h>
  #include <wchar.h>
  #include <wctype.h>
  int main() {
        wint_t wide_char;
        char input;
        printf("Enter your input:");
        input = getchar();

        /* mbtowc -Converts character to wide character format */
        wide_char = btowc(input);

        printf("Return value: %c\n", towupper(wide_char));
        return 0;
  }

  Output:

  Enter your input:a
  Return value: A