ECVT(3C)                             SysV                             ECVT(3C)



NAME
     ecvt, fcvt, gcvt - convert floating-point number to string

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;
     int ndigit;
     char *buf;

DESCRIPTION
     ecvt converts value to a null terminated string of ndigit digits and
     returns a pointer thereto.  The high-order digit is nonzero, unless the
     value is zero.  The low-order digit is rounded.  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). The decimal point is not included in the returned string.  If
     the sign of the result is negative, the word pointed to by sign is
     nonzero, otherwise it is zero.

     fcvt is identical to ecvt, except that the correct digit has been rounded
     for printf "%f" (FORTRAN F-format) output of the number of digits
     specified by ndigit.

     gcvt converts the value to a null terminated string in the array pointed
     to by buf and returns buf.  It attempts to produce ndigit significant
     digits in FORTRAN F-format if possible, otherwise E-format, ready for
     printing. A minus sign, if there is one, or a decimal point will be
     included as part of the returned string.  Trailing zeros are suppressed.

SEE ALSO
     printf(3S).

BUGS
     The values returned by ecvt and fcvt point to a single static data array
     whose content is overwritten by each call.