USAGE
   signed int scctsvalid(
           signed char *string,
           signed int format );

PROTOTYPE IN
   sc_clock.h

DESCRIPTION
   scctsvalid tests the ASCIIZ time string string passed for validity:
   string properly formatted (format), valid hours, minutes, and seconds.

   Time string styles:
   SC_CSHMS   hh:mm:ss
   SC_MIL     military (0000-2359)

EXAMPLE
   #include <stdio.h>
   #include <softc.h>
   #include <sc_clock.h>

   void main()
   {
     if (scctsvalid("12:03:59",SC_CSHMS) == SC_SUCCESS)
       puts("Good Time.");
     else
       puts("Bad Time.");
   }