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.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
.\"
.\" 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.\" manual page may be incorrect or out-of-date.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.
.\"
.\" References consulted:
.\" Linux libc source code
.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
.\" 386BSD man pages
.\" Modified Sun Mar 28 00:25:51 1993, David Metcalfe
.\" Modified Sat Jul 24 18:13:39 1993 by Rik Faith (faith@cs.unc.edu)
.\" Modified Sun Aug 20 21:47:07 2000, aeb
.\"
.\" Japanese Version Copyright (c) 1997 YOSHINO Takashi
.\" all rights reserved.
.\" Translated Tue Jan 21 21:04:41 JST 1997
.\" by YOSHINO Takashi <yoshino@civil.jcn.nihon-u.ac.jp>
.\"
.\" WORD: non-linear additive feedback ˡեɥХå
.\" WORD: state array
.\"
.TH RANDOM 3 "August 20, 2000" "GNU" "Linux Programmer's Manual"
.SH ̾
random, srandom, initstate, setstate \- ؿ
.SH
.nf
.B #include <stdlib.h>
.sp
.B long int random(void);
.nl
.BI "void srandom(unsigned int " seed );
.nl
.BI "char *initstate(unsigned int " seed ", char *" state ", size_t " n );
.nl
.BI "char *setstate(char *" state );
.fi
.SH
\fBrandom()\fPؿˡեɥХåѤؿǤ롣
δؿϡ0\fBRAND_MAX\fRޤǤε֤
Τ31ĤΥʤǥեɽѤ롣
ؿμϤȤƤĹ褽16*((2**31)\-1)Ǥ롣
.PP
\fBsrandom()\fPؿϡ
\fBrandom()\fP֤뵿μꤹ롣
ΤˤϿˤ\fBsrandom()\fPƤ٤Ф褤
\fBrandom()\fPϡ
ƱͤѤ\fBsrandom()\fPƤ֤ȤǺƸǽǤ롣
ͤͿʤˤ\fBrandom()\fPؿϡưŪ1ꤹ롣
.PP
\fBinitstate()\fPؿϡ\fBrandom()\fPǻѤ\fIstate\fP
롣
Ѥؿǽ٤ꤹ뤿ˡ
\fBinitstate()\fPǾ礭\fIn\fPѤ롣
(礭ǽɤʤ롣)
\fIseed\fPϽΤμǤ롣
γϰ֤ꤹΤǤꡢ
ͤꤹ뤳ȤƱγϰ֤
Ƴ뤳ȤǤ롣
.PP
\fIstate\fPϡ\fBinitstate()\fPޤ\fBsetstate()\fP
˸ƤӽФޤǡ˻Ѥ롣
\fIstate\fP\fBinitstate()\fPѤƺǽ˽Ƥ뤫
˸ƤӽФ \fBsetstate()\fP η̤ǤʤФʤʤ
.SH ֤
\fBrandom()\fPؿ0RAND_MAXδ֤֤ͤ
\fBsrandom()\fPؿ֤ͤʤ
\fBinitstate()\fPؿ\fBsetstate()\fPؿ
ľξؤΥݥޤ NULL ֤
.SH 顼
.TP
.B EINVAL
\fBinitstate()\fP8ХȤ⾮ꤷ
.SH
\fIn\fP礭θߤ"Ŭ"ͤ
83264128256ХȤǤ롣
¾̤ꤷˤϡꤷ̤ۤʤҤͤ
Ǥᤤͤˤʤ롣
8Х̤̤ꤷˤϥ顼θȤʤ롣
.SH
BSD 4.3
.SH Ϣ
.BR rand (3),
.BR srand (3)
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