[unix-history] / usr / man / man3 / ecvt.3

.TH ECVT 3 
.SH NAME
ecvt, fcvt, gcvt \- output conversion
.SH SYNOPSIS
.B char *ecvt(value, ndigit, decpt, sign)
.br
.B double value;
.br
.B int ndigit, *decpt, *sign;
.PP
.B char *fcvt(value, ndigit, decpt, sign)
.br
.B double value;
.br
.B int ndigit, *decpt, *sign;
.PP
.B char *gcvt(value, ndigit, buf)
.br
.B double value;
.br
.B char *buf;
.SH DESCRIPTION
.I Ecvt
converts the 
.I value
to a null-terminated string of
.I 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
.IR decpt ""
(negative means to the left of the
returned digits).
If the sign of the result is negative,
the word pointed to by
.IR sign ""
is non-zero, otherwise
it is zero.
The low-order digit is rounded.
.PP
.IR Fcvt " is identical to " "ecvt\fR, except that the correct digit"
has been rounded for Fortran F-format output of the number
of digits specified by
.IR \(*_ndigits .
.PP
.I Gcvt
converts the
.I value
to a null-terminated ASCII string in
.I buf
and returns a pointer to 
.I buf.
It attempts to produce
.I ndigit
significant digits in Fortran F format if
possible, otherwise E format, ready for
printing.
Trailing zeros may be suppressed.
.SH "SEE ALSO"
printf(3)
.SH BUGS
The return values point to static data
whose content is overwritten by each call.
Commit	Line	Data
e6817382 BJ	1	.TH ECVT 3
	2	.SH NAME
	3	ecvt, fcvt, gcvt \- output conversion
	4	.SH SYNOPSIS
	5	.B char *ecvt(value, ndigit, decpt, sign)
	6	.br
	7	.B double value;
	8	.br
	9	.B int ndigit, decpt, sign;
	10	.PP
	11	.B char *fcvt(value, ndigit, decpt, sign)
	12	.br
	13	.B double value;
	14	.br
	15	.B int ndigit, decpt, sign;
	16	.PP
	17	.B char *gcvt(value, ndigit, buf)
	18	.br
	19	.B double value;
	20	.br
	21	.B char *buf;
	22	.SH DESCRIPTION
	23	.I Ecvt
	24	converts the
	25	.I value
	26	to a null-terminated string of
	27	.I ndigit
	28	ASCII digits
	29	and returns a pointer thereto.
	30	The position of the decimal point relative to the
	31	beginning of the string is stored indirectly
	32	through
	33	.IR decpt ""
	34	(negative means to the left of the
	35	returned digits).
	36	If the sign of the result is negative,
	37	the word pointed to by
	38	.IR sign ""
	39	is non-zero, otherwise
	40	it is zero.
	41	The low-order digit is rounded.
	42	.PP
	43	.IR Fcvt " is identical to " "ecvt\fR, except that the correct digit"
	44	has been rounded for Fortran F-format output of the number
	45	of digits specified by
	46	.IR \(*_ndigits .
	47	.PP
	48	.I Gcvt
	49	converts the
	50	.I value
	51	to a null-terminated ASCII string in
	52	.I buf
	53	and returns a pointer to
	54	.I buf.
	55	It attempts to produce
	56	.I ndigit
	57	significant digits in Fortran F format if
	58	possible, otherwise E format, ready for
	59	printing.
	60	Trailing zeros may be suppressed.
	61	.SH "SEE ALSO"
	62	printf(3)
	63	.SH BUGS
	64	The return values point to static data
65	whose content is overwritten by each call.