ecvt(3C) — sys5



ECVT(3C)        DOMAIN/IX Reference Manual (SYS5)        ECVT(3C)



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

USAGE
     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 the string.  The high-order
     digit is non-zero, unless the value itself 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 sign points to 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 then returns buf.  It attempts
     to produce ndigit significant digits in FORTRAN F-format if
     possible; otherwise, it uses E-format, ready for printing.
     A minus sign or a decimal point will be included as part of
     the returned string.  Trailing zeros are suppressed.

NOTES
     The values returned by ecvt and fcvt point to a single
     static data array, whose contents are overwritten by each
     call.

RELATED INFORMATION
     printf(3S).









Printed 5/10/85                                            ECVT-1
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