1  #include <stdio.h>
       2  #include <wchar.h>
       3  
       4  int
       5  main (int argc, char *argv[])
       6  {
       7    fputws (L"Hello world!\n", stdout);
       8    wprintf (L"This %s a %ls string: %d\n", "is", L"mixed", 42);
       9    wprintf (L"%Iu\n", 0xfeedbeef);
      10    return 0;
      11  }