USAGE
   signed int sccds2dow(
           signed char *dayofweek,
           signed char *daystr,
           signed int format );

PROTOTYPE IN
   sc_clock.h

DESCRIPTION
   sccds2dow converts an ASCIIZ string date datestr to an integer
   dayofweek. dayofweek will be a value between 0 (Sunday) and 6
   (Saturday).

   Date string styles:
   SC_GREGOR     mm/dd/yy
   SC_GREGORL    mm/dd/yyyy
   SC_JULIAN     yyyy/ddd
   SC_YMD        yyyymmdd
   SC_DMY        ddmmyy

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

   void main()
   {
     char dayofweek;

     sccds2dow(&dayofweek, "19900516",SC_YMD);
     printf("%d\n",dayofweek);
   }