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 similar to ecvt and produces output for the Fortran
          format F*.ndigit. If decpt ≦ -ndigit, then the returned
          string is null.  Otherwise, decpt+ndigit characters are
          returned.

          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.