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   fcvt

   Usage
   #include <process.h>
   char *fcvt(double val,int nfrac,int *pdecpt,int *psign);

   Description
   Converts the double value into a string and returns a pointer to  that
   string.  nfrac  specifies the number of digits that appear  after  the
   decimal  point.  The  digit string is rounded.  The  position  of  the
   decimal point relative to the left of the first digit in the string is
   stored  in  *pdecpt.  If *pdecpt is negative,  the  decimal  point  is
   positioned that many places to the left of the string. Into *psign  is
   stored  0  if val >= 0, else a non-zero value. The string  is  written
   into  a statically allocated area, shared with ecvt and printf,  which
   is reused at each call.

   Example
   #include <stdio.h>
   #include <process.h>
   main()
   {
   char *buffer;
   int dec, sign;
        buffer = fcvt(98.69138432, 5, &dec, &sign);
        printf("buffer = \"%s\", decimal = %d, sign = %d\n",
                  buffer,dec,sign);
   }

   Return Value
   Returns a pointer to a static string of digits which is overwritten by
   each call to ecvt, fcvt or printf.