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

.\"	@(#)atof.3	6.1 (Berkeley) 5/15/85
.\"
.TH ATOF 3  "May 15, 1985"
.AT 3
.SH NAME
atof, atoi, atol \- convert ASCII to numbers
.SH SYNOPSIS
.nf
.B double atof(nptr)
.B char *nptr;
.PP
.B atoi(nptr)
.B char *nptr;
.PP
.B long atol(nptr)
.B char *nptr;
.fi
.SH DESCRIPTION
These functions convert a string pointed to by
.I nptr
to floating, integer, and long integer representation respectively.
The first unrecognized character ends the string.
.PP
.I Atof
recognizes an optional string of spaces, then an optional sign, then
a string of digits optionally containing a decimal
point, then an optional `e' or `E' followed by an optionally signed integer.
.PP
.I Atoi
and
.I atol
recognize an optional string of spaces, then an optional sign, then a
string of
digits.
.SH SEE ALSO
scanf(3S)
.SH BUGS
There are no provisions for overflow.
Commit	Line	Data
95f51977	1	.\" @(#)atof.3 6.1 (Berkeley) 5/15/85
f11907db	2	.\"
95f51977	3	.TH ATOF 3 "May 15, 1985"
f11907db KM	4	.AT 3
	5	.SH NAME
	6	atof, atoi, atol \- convert ASCII to numbers
	7	.SH SYNOPSIS
	8	.nf
	9	.B double atof(nptr)
	10	.B char *nptr;
	11	.PP
	12	.B atoi(nptr)
	13	.B char *nptr;
	14	.PP
	15	.B long atol(nptr)
	16	.B char *nptr;
	17	.fi
	18	.SH DESCRIPTION
	19	These functions convert a string pointed to by
	20	.I nptr
15a002cb	21	to floating, integer, and long integer representation respectively.
f11907db KM	22	The first unrecognized character ends the string.
	23	.PP
	24	.I Atof
15a002cb	25	recognizes an optional string of spaces, then an optional sign, then
f11907db	26	a string of digits optionally containing a decimal
15a002cb	27	point, then an optional `e' or `E' followed by an optionally signed integer.
f11907db KM	28	.PP
	29	.I Atoi
	30	and
	31	.I atol
15a002cb KM	32	recognize an optional string of spaces, then an optional sign, then a
15a002cb KM	33	string of
f11907db KM	34	digits.
f11907db KM	35	.SH SEE ALSO
15a002cb	36	scanf(3S)
f11907db KM	37	.SH BUGS
f11907db KM	38	There are no provisions for overflow.