ECVT(3)                    Linux Programmer's Manual                   ECVT(3)

       ecvt, fcvt - convert a floating-point number to a string.

       #include <stdlib.h>

       char *ecvt(double number, int ndigits, int *decpt, int *sign);

       char *fcvt(double number, int ndigits, int *decpt, int *sign);

       The  ecvt()  function  converts  number  to a null-terminated string of
       ndigits digits (where ndigits is reduced to  an  system-specific  limit
       determined  by the precision of a double), and returns a pointer to the
       string. The high-order digit is nonzero, unless number is zero. The low
       order  digit  is rounded.  The string itself does not contain a decimal
       point; however, the position of the decimal point relative to the start
       of  the  string  is stored in *decpt. A negative value for *decpt means
       that the decimal point is to the left of the start of the  string.   If
       the  sign of number is negative, *sign is set to a non-zero value, oth-
       erwise it's set to 0. If number is  zero,  it  is  unspecified  whether
       *decpt is 0 or 1.

       The  fcvt() function is identical to ecvt(), except that ndigits speci-
       fies the number of digits after the decimal point.

       Both the ecvt() and fcvt() functions  return  a  pointer  to  a  static
       string  containing  the  ASCII  representation  of  number.  The static
       string is overwritten by each call to ecvt() or fcvt().

       These functions are obsolete. Instead, sprintf() is recommended.  Linux
       libc4  and  libc5  specified  the  type  of ndigits as size_t.  Not all
       locales use a point as the radix character (`decimal point').

       SysVR2, XPG2

       ecvt_r(3), gcvt(3), qecvt(3), setlocale(3), sprintf(3)

                                  1999-06-25                           ECVT(3)