#include <wchar.h>
   int fputws(const wchar_t *string, FILE *stream);

fputws writes the wide-character string to the stream, at the position of the file pointer and advances the pointer.
If the write was successful, a nonnegative integer value is returned. Otherwise, the function returns WEOF.

/* 
 * clearerr example code
 * http://code-reference.com/c/wchar.h/fputws 
 */
#include <stdio.h> /* including standard library */
//#include <windows.h> /* uncomment this for Windows */
 
#include <wchar.h>
#include <locale.h> /* nessesary for this example */
 
int main ( void )
{
   setlocale(LC_ALL,""); 
   wchar_t string[] = L"fputws example for code-reference.com ÖÄÜ\n";
 
   if (fputws(string, stdout) == WEOF) {
        return 1;
    }
    return 0;
}

  
  ./fputws 
  fputws example for code-reference.com ÖÄÜ