Example

     The following example shows how to print a date and time in the
     form "Sunday, July 3, 10:02", followed by pi to five decimal
     places:

       #include <math.h>
       #include <stdio.h>
       #include <wchar.h>
       /* . . . */
       wchar_t *weekday, *month; /* pointers to wide-character strings */
       int day, hours, min;
       fwprintf(stdout, L"%ls, %ls %d, %.2d:%.2d\n",
          weekday, month, day, hour, min);
       fwprintf(stdout, L"pi = %.5f\n", 4 * atan(1.0));