Arguments

 

value

   An object of type double that is converted to a null-terminated
   string of ASCII digits.
 

ndigits

   The number of ASCII digits after the decimal point to be used in
   the converted string.
 

decpt

   The position of the decimal point relative to the first character
   in the returned string. The returned string does not contain the
   actual decimal point. A negative int value means that the decimal
   point is decpt number of spaces to the left of the returned
   digits (the spaces are filled with zeros). A 0 value means that
   the decimal point is immediately to the left of the first digit
   in the returned string.
 

sign

   An integer value that indicates whether the value argument is
   positive or negative. If value is negative, the fcvt function
   places a nonzero value at the address specified by sign.
   Otherwise, the functions assign 0 to the address specified by
   sign.