ECVT(3C)            RISC/os Reference Manual             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 the value to a null-terminated string of ndi-
     git digits and returns a pointer thereto.  The high-order
     digit is non-zero, unless the value is zero.  The low-order
     digit is rounded.  The position of the decimal point rela-
     tive 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 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 printf ``%f'' (FORTRAN F-format) output of
     the number of digits specified by ndigits.

     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.








                        Printed 11/19/92                   Page 1