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-.\" Copyright (c) 1990, 1991, 1993
-.\" The Regents of the University of California. All rights reserved.
-.\"
-.\" This code is derived from software contributed to Berkeley by
-.\" the American National Standards Committee X3, on Information
-.\" Processing Systems.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\" notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\" notice, this list of conditions and the following disclaimer in the
-.\" documentation and/or other materials provided with the distribution.
-.\" 3. All advertising materials mentioning features or use of this software
-.\" must display the following acknowledgement:
-.\" This product includes software developed by the University of
-.\" California, Berkeley and its contributors.
-.\" 4. Neither the name of the University nor the names of its contributors
-.\" may be used to endorse or promote products derived from this software
-.\" without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\" @(#)rand.3 8.1 (Berkeley) 6/4/93
-.\" %FreeBSD: src/lib/libc/stdlib/rand.3,v 1.4.2.5 2001/12/14 18:33:58 ru Exp %
-.\" $FreeBSD$
-.\"
-.Dd May 25, 1999
-.Dt RAND 3
-.Os
-.Sh 名称
-.Nm rand ,
-.Nm srand ,
-.Nm rand_r
-.Nd 不十分な乱数ジェネレータ
-.Sh ライブラリ
-.Lb libc
-.Sh 書式
-.In stdlib.h
-.Ft void
-.Fn srand "unsigned seed"
-.Ft int
-.Fn rand void
-.Ft int
-.Fn rand_r "unsigned *ctx"
-.Sh 解説
-.Bf -symbolic
-このインタフェースは、
-.Xr random 3
-に置き換えられました。
-.Ef
-.Pp
-.Fn rand
-関数は、0 から
-.Dv RAND_MAX
-(ヘッダファイル
-.Aq Pa stdlib.h
-で定義) の範囲で、疑似乱整数のシーケンスを算出します。
-.Pp
-.Fn srand
-関数は、引数
-.Fa seed
-を、
-.Fn rand
-が戻す疑似乱数の新しいシーケンスの種として設定します。
-このシーケンスは、同じ値の種を用いて
-.Fn srand
-を呼び出すことで繰り返すことができます。
-.Pp
-.Fa 種
-の値を指定しないと、これらの関数は自動的に 1 を種として使用します。
-.Pp
-.Fn rand_r
-は、
-.Fn rand
-と同じ機能を提供します。
-コンテキスト毎の値である
-.Fa ctx
-へのポインタは、呼び出し側が提供する必要があります。
-.Sh 関連項目
-.Xr random 3
-.Sh 規格
-.Fn rand
-関数と
-.Fn srand
-関数は、
-.St -isoC
-に適合しています。
-.Pp
-.Fn rand_r
-関数は POSIX.4a Draft #6 ドキュメントで提案されています。