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.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
.\" Distributed under GPL
.\" based on glibc infopages
.\"
.\" Japanese Version Copyright (c) 2002 Akihiro MOTOKI
.\" all rights reserved.
.\" Translated Sun Sep 22 08:44:32 2002
.\" by Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\" Updated & Modified Sat Feb 12 12:40:00 2005
.\" by SAITOH Akira <s-akira@users.sourceforge.net>
.\"
.TH LGAMMA 3 2002-08-10 "" "Linux Programmer's Manual"
.SH ̾
lgamma, lgammaf, lgammal, lgamma_r, lgammaf_r, lgammal_r \- ؿп
.SH
.nf
.B #include <math.h>
.sp
.BI "double lgamma(double " x );
.br
.BI "float lgammaf(float " x );
.br
.BI "long double lgammal(long double " x );
.sp
.BI "double lgamma_r(double " x ", int *" signp );
.br
.BI "float lgammaf_r(float " x ", int *" signp );
.br
.BI "long double lgammal_r(long double " x ", int *" signp );
.fi
.sp
ѥ˥ץ \-std=c99
˥ץ \-lm Ѥ뤳ȡ
.SH
ؿˤĤƤϡ
.BR tgamma (3)
ȤΤȡ
.PP
ؿ \fBlgamma()\fP ϡؿͤμп֤
ؿϡ
.IR <math.h>
Ƥ extern int \fIsigngam\fP ˳Ǽ롣
Ǽͤϡؿޤ 0 ξ 1
ξ \-1 Ǥ롣
.PP
.I signgam
Ȥꤵ줿ȤȤϥåɥդǤϤʤΤǡ
ؿ \fBlgamma_r()\fP ʤɤƳƤ롣
δؿǤϡϥѥ
.IR signp
ͳ֤롣
.PP
\fIx\fP Ǥʤξ硢 \fBlgamma()\fP HUGE_VAL ֤
\fIerrno\fP ERANGE åȤ0 ǤνȤ
㳰(zero divide exception)ȯ롣
(Ʊ \fBlgammaf()\fP HUGE_VALF
\fBlgammal()\fP HUGE_VALL ֤)
.SH 顼
顼å뤿ˤϡδؿƤӽФ
.I errno
0 ˥åȤ
.I feclearexcept(FE_ALL_EXCEPT)
Ƥ٤Ф褤
ؿ¹Ըˡ
.I errno
0 ʳ
.I fetestexcept(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW)
0 ʳʤС顼ȯȤʬ롣
.LP
\fIx\fP 礭硢range error ȯ롣
\fIx\fP 뤤 0 Ǥ硢 pole error ȯ롣
.SH
C99, SVID 3, BSD 4.3
.SH Ϣ
.BR tgamma (3)
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