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.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
.\" and Copyright 2008, Linux Foundation, written by Michael Kerrisk
.\" <mtk.manpages@gmail.com>
.\" Distributed under GPL
.\" Based on glibc infopages
.\"
.\" Japanese Version Copyright (c) 2003 Akihiro MOTOKI all rights reserved.
.\" Translated Mon Jan 27 2003 by Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\" Updated 2008-09-18, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\"
.\"WORD: mantissa
.\"WORD: normalized 줿
.\"WORD: subnormal
.\"
.TH NEXTAFTER 3 2008-10-06 "GNU" "Linux Programmer's Manual"
.SH ̾
nextafter, nextafterf, nextafterl, nexttoward, nexttowardf, nexttowardl \-
ư
.SH
.B #include <math.h>
.sp
.BI "double nextafter(double " x ", double " y );
.br
.BI "float nextafterf(float " x ", float " y );
.br
.BI "long double nextafterl(long double " x ", long double " y );
.sp
.BI "double nexttoward(double " x ", long double " y );
.br
.BI "float nexttowardf(float " x ", long double " y );
.br
.BI "long double nexttowardl(long double " x ", long double " y );
.sp
\fI\-lm\fP ǥ롣
.sp
.in -4n
glibc εǽޥ
.RB ( feature_test_macros (7)
):
.in
.sp
.ad l
.BR nextafter ():
_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE\ >=\ 500 || _ISOC99_SOURCE; or
.I cc\ -std=c99
.br
.BR nextafterf (),
.BR nextafterl ():
_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE\ >=\ 600 || _ISOC99_SOURCE; or
.I cc\ -std=c99
.br
.BR nexttoward (),
.BR nexttowardf (),
.BR nexttowardl ():
_XOPEN_SOURCE\ >=\ 600 || _ISOC99_SOURCE;
.I cc\ -std=c99
.ad b
.SH
.BR nextafter ()
ؿϡ\fIy\fP ˸ \fIx\fP Τưɽ֤
.I y
.I x
꾮硢
.I y
꾮ưɽ֤ͤ
\fIx\fP \fIy\fP 硢\fIy\fP ֤롣
.BR nexttoward ()
ؿϡ2 ܤΰ
.I long double
Ǥʳ
.BR nextafter ()
ؿƱϤ餭롣
.SH ֤
ȡδؿ \fIy\fP ˸ \fIx\fP
ưɽ֤
.I x
.I y
硢
.RI ( x
Ʊ˥㥹Ȥ줿)
.I y
֤롣
.I x
.I y
NaN ξ硢NaN ֤롣
.I x
ͭͤ
.\" e.g., DBL_MAX
̤Сե硢
ϰϥ顼 (range error) ȯ
ƴؿϤ줾
.BR HUGE_VAL ,
.BR HUGE_VALF ,
.B HUGE_VALL
֤֤ͤˤϿŪ椬Ϳ롣
.I x
.I y
ƱǤϤʤؿη̤եξ硢
ϰϥ顼ȯ
(ɽǽʾˤ) ͤ(Ǥʤˤ) 0.0 ֤롣
.SH 顼
δؿƤӽФݤ˥顼ȯȽˡˤĤƤξ
.BR math_error (7)
ȤΤȡ
.PP
ʲΥ顼ȯǽ롣
.TP
ϰϥ顼: ̤ΥСե
.\" e.g., nextafter(DBL_MAX, HUGE_VAL);
.\" .I errno
.\" is set to
.\" .BR ERANGE .
Сեư㳰
.RB ( FE_OVERFLOW )
夬롣
.TP
ϰϥ顼: ̤ե
.\" e.g., nextafter(DBL_MIN, 0.0);
.\" .I errno
.\" is set to
.\" .BR ERANGE .
եư㳰
.RB ( FE_UNDERFLOW )
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=6799
.SH
C99, POSIX.1-2001.
δؿ IEC 559 Ƥ롣
(ޤ IEEE 754/IEEE 854 ǤϿǿ侩ؿȤƤ)
.SH Х
glibc С 2.5 Ǥϡեȯݤˡ
δؿϥեư㳰
.RB ( FE_UNDERFLOW )
夬ʤ
.SH Ϣ
.BR nearbyint (3)
|
