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.\" Copyright 2001 Andries Brouwer <aeb@cwi.nl>.
.\" 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.\" manual page may be incorrect or out-of-date.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.
.\"
.\" Japanese Version Copyright (c) 1997 Ueyama Rui
.\" all rights reserved.
.\" Translated Tue Feb 21 0:47:30 JST 1997
.\" by Ueyama Rui <ueyama@campusnet.or.jp>
.\" Updated & Modified Fri Jul 6 20:35:28 JST 2001
.\" by Yuichi SATO <ysato@h4.dion.ne.jp>
.\" Updated & Modified Sun Jan 9 23:39:35 JST 2005
.\" by Yuichi SATO <ysato444@yahoo.co.jp>
.\" Updated 2008-09-15, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\"
.\"WORD: mantissa
.\"
.TH CEIL 3 2008-08-05 "" "Linux Programmer's Manual"
.SH ̾
ceil, ceilf, ceill \- ʤǾ
.SH
.nf
.B #include <math.h>
.sp
.BI "double ceil(double " x );
.br
.BI "float ceilf(float " x );
.br
.BI "long double ceill(long double " x );
.fi
.sp
\fI\-lm\fP ǥ롣
.sp
.in -4n
glibc εǽޥ
.RB ( feature_test_macros (7)
):
.in
.sp
.ad l
.BR ceilf (),
.BR ceill ():
_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE\ >=\ 600 || _ISOC99_SOURCE; or
.I cc\ -std=c99
.ad b
.SH
δؿ \fIx\fP 꾮ʤǾ֤ͤ
㤨С
.I ceil(0.5)
1.0 Ǥꡢ
.I ceil(\-0.5)
0.0 Ǥ롣
.SH ֤
δؿ
.I x
ʤ֤ͤ
\fIx\fP +0\-0NaN̵¤Τ줫ξ硢
\fIx\fP ΤΤ֤
.SH 顼
顼ȯʤ
POSIX.1-2001 ˤϥСեФϰϥ顼ܤƤ롣
աפȡ
.SH
C99, POSIX.1-2001.
.I double
Ǥδؿ SVr4, 4.3BSD, C89 ˤƤ롣
.SH
SUSv2 POSIX.1-2001 ˤϥСե˴ؤ뵭Ҥꡢ
Сեκݤˤ
.I errno
.B ERANGE
ꤹ뤫
.B FE_OVERFLOW
㳰ȤʤäƤ롣
ºݤΤȤɤθԤΥޥǤ̤СեȤ
ʤΤǡΥ顼ϰ̣ʤ
.\" The POSIX.1-2001 APPLICATION USAGE SECTION discusses this point.
(Τ˸ȡСեϻؿκͤ
ɽӥåȤο꾮ˤʤ
IEEE-754 ʤ 32 ӥåȤ 64 ӥåȤưǤϡ
ؿκͤϤ줾 128 1024 Ǥꡢ
ΥӥåȿϤ줾 24 53 Ǥ롣)
δؿ֤ͤ
.RI ( int ,
.I long
ʤ) ˳Ǽˤ礭뤫⤷ʤ
Сեäη̤ʬʤΤǡ
Сե뤿ᡢץꥱǤ
֤줿ͤϰϳǧ¹Ԥ٤Ǥ롣
.SH Ϣ
.BR floor (3),
.BR lrint (3),
.BR nearbyint (3),
.BR rint (3),
.BR round (3),
.BR trunc (3)
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