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ecvt

Usage

   #include <stdlib.h>
   char *ecvt(double val,int ndig,int *pdecpt,int *psign);

Description

   Converts the double value val into a string and returns a pointer to that
   string. The number of digits to be created is given by ndig. The digit
   string is rounded if the actual number of digits exceeds ndig. The string
   is padded with 0 s if ndig is greater than the actual number of digits.
   As only digits are stored in the string, the position of the decimal
   point relative to the left of the first digit in the string is stored in
   the integer pointed to by *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 fcvt
   and printf, which is reused at each call.

Example 

   #include <stdio.h>
   #include <stdlib.h>

   int main()
   {
       char *buffer;
       int dec, sign;

       buffer = ecvt(98.69138432, 5, &dec, &sign);
       printf("buffer = \"%s\", decimal = %d, sign = %d\n",
               buffer,dec,sign);
       return EXIT_SUCCESS;
   }

Return Value


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

See Also

   fcvt, sfcvt, sprintf printf