USAGE
   signed int scdnkdate(
           double *key,
           signed char *string,
           signed int format );

PROTOTYPE IN
   sc_base.h

DESCRIPTION
   scdnkdate will translate an ASCIIZ date string string of style
   format into a valid dBASE date key key.

   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_base.h>

   void main()
   {
     double key;

     scdinit(20,0);
     scdnkdate(&key,"19890801");
     printf("%lf",key);
     scdterm();
   }