ecvt(3C)                                                 ecvt(3C)



     NAME
          ecvt, fcvt, gcvat - 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 to this string.  The high-order
          digit is non-zero, 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 non-zero; 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, ready
          for printing; E-format is produced when F-format is not
          possible.  A minus sign, if there is one, or a decimal point
          is 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.









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