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.\" Copyright 1995 Jim Van Zandt <jrv@vanzandt.mv.com>
.\" and Copyright 2008, Linux Foundation, written by Michael Kerrisk
.\" <mtk.manpages@gmail.com>
.\"
.\" Permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\" Permission is granted to copy and distribute modified versions of this
.\" manual under the conditions for verbatim copying, provided that the
.\" entire resulting derived work is distributed under the terms of a
.\" permission notice identical to this one.
.\"
.\" Since the Linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date. The author(s) assume no
.\" responsibility for errors or omissions, or for damages resulting from
.\" the use of the information contained herein. The author(s) may not
.\" have taken the same level of care in the production of this manual,
.\" which is licensed free of charge, as they might when working
.\" professionally.
.\"
.\" Formatted or processed versions of this manual, if unaccompanied by
.\" the source, must acknowledge the copyright and authors of this work.
.\"
.\" Modified 2002-07-27 Walter Harms
.\" (walter.harms@informatik.uni-oldenburg.de)
.\"
.\" Japanese Version Copyright (c) 1998 NAKANO Takeo all rights reserved.
.\" Translated Mon May 18 1998 by NAKANO Takeo <nakano@apm.seikei.ac.jp>
.\" Update Tue Sep 23 2003 by Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\" Updated 2008-09-16, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\"
.TH EXPM1 3 2008-08-05 "" "Linux Programmer's Manual"
.SH ̾
expm1, expm1f, expm1l \- λؿ 1
.SH
.nf
.B #include <math.h>
.sp
.BI "double expm1(double " x );
.br
.BI "float expm1f(float " x );
.br
.BI "long double expm1l(long double " x );
.sp
.fi
\fI\-lm\fP ǥ롣
.sp
.in -4n
glibc εǽޥ
.RB ( feature_test_macros (7)
):
.in
.sp
.ad l
.BR expm1 ():
_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE\ >=\ 500 || _ISOC99_SOURCE; or
.I cc\ -std=c99
.br
.BR expm1f (),
.BR expm1l ():
_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE\ >=\ 600 || _ISOC99_SOURCE; or
.I cc\ -std=c99
.ad b
.SH
.BI expm1( x )
ϰʲ֤ͤ
.nf
exp(x) \- 1
.fi
\fIx\fP 0 ˶
.I "exp(x) \- 1"
ηΤΤȤʤ褦ʾǤ⡢
ΤͤǤˡѤ롣
.SH ֤
ȡδؿ
.I "exp(x)\ \-\ 1"
֤
.I x
NaN ξ硢NaN ֤롣
.I x
+0 (\-0) ξ硢+0 (\-0) ֤롣
.I x
̵ξ硢̵礬֤롣
.I x
̵ξ硢\-1 ֤롣
̤Сե硢ϰϥ顼 (range error) ȯ
ƴؿϤ줾
.RB - HUGE_VAL ,
.RB - HUGE_VALF ,
.RB - HUGE_VALL
֤
.SH 顼
δؿƤӽФݤ˥顼ȯȽˡˤĤƤξ
.BR math_error (7)
ȤΤȡ
.PP
ʲΥ顼ȯǽ롣
.TP
ϰϥ顼 (range error)Сեξ
.\" .I errno
.\" is set to
.\" .BR ERANGE .
Сեư㳰
.RB ( FE_OVERFLOW )
夬롣
.PP
δؿ
.I errno
ꤷʤ
.\" FIXME . Is it intentional that these functions do not set errno?
.\" Bug raised: http://sources.redhat.com/bugzilla/show_bug.cgi?id=6788
.\"
.\"
.\" POSIX.1 specifies an optional range error (underflow) if
.\" x is subnormal. Glibc does not implement this.
.SH
C99, POSIX.1-2001.
.\" BSD.
.SH Х
.I x
礭ͤξ (ξˤϴؿη̤ \-1 ˶դƤ)
.BR expm1 ()
ϴְäƥեư㳰夲뤳Ȥ롣
.\" FIXME .
.\" Bug raised: http://sources.redhat.com/bugzilla/show_bug.cgi?id=6778
.I x
礭ͤξ硢
.BR expm1 ()
ϴ̤ΥСե㳰Ǥʤ
ְä (invalid) ư㳰夲
̵ǤϤʤ NaN ֤Ȥ롣
.\" FIXME .
.\" Bug raised: http://sources.redhat.com/bugzilla/show_bug.cgi?id=6814
.\" e.g., expm1(1e5) through expm1(1.00199970127e5),
.\" but not expm1(1.00199970128e5) and beyond.
.SH Ϣ
.BR exp (3),
.BR log (3),
.BR log1p (3)
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