4.3BSD - /usr/man/cat3/gcvt.0

ECVT(3)                                                                ECVT(3)


NAME
       ecvt, fcvt, gcvt - output conversion

SYNOPSIS
       char *ecvt(value, ndigit, decpt, sign)
       double value;
       int ndigit, *decpt, *sign;

       char *fcvt(value, ndigit, decpt, sign)
       double value;
       int ndigit, *decpt, *sign;

       char *gcvt(value, ndigit, buf)
       double value;
       char *buf;

DESCRIPTION
       Ecvt  converts  the  value  to a null-terminated string of ndigit ASCII
       digits and returns a pointer thereto.   The  position  of  the  decimal
       point  relative  to  the  beginning  of the string is stored indirectly
       through decpt (negative means to the left of the returned digits).   If
       the sign of the result is negative, the word pointed to by sign is non-
       zero, otherwise it is zero.  The low-order digit is rounded.

       Fcvt is identical to ecvt, except  that  the  correct  digit  has  been
       rounded  for  Fortran F-format output of the number of digits specified
       by ndigits.

       Gcvt converts the value to a null-terminated ASCII string  in  buf  and
       returns  a  pointer  to buf.  It attempts to produce ndigit significant
       digits in Fortran F format if possible, otherwise E format,  ready  for
       printing.  Trailing zeros may be suppressed.

SEE ALSO
       printf(3)

BUGS
       The  return values point to static data whose content is overwritten by
       each call.


7th Edition                      May 15, 1985                          ECVT(3)