widechar-2.c

this is a gcc file, you can download it and learn its usetility, for further detail please look at t

#include <stddef.h>

const wchar_t ws[] = L"foo";

int
main (void)
{
  if (ws[0] != L'f' || ws[1] != L'o' || ws[2] != L'o' || ws[3] != L'\0')
    abort();
  exit(0);
}