.\" 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.
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.\"    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
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.\"     @(#)rand.3	8.1 (Berkeley) 6/4/93
.\"
.\" $FreeBSD$
.Dd June 4, 1993
.Dt RAND 3
.Os
.Sh 名称
.Nm rand ,
.Nm srand
.Nd 不十分な乱数ジェネレータ
.Sh 書式
.Fd #include <stdlib.h>
.Ft void
.Fn srand "unsigned seed"
.Ft int
.Fn rand void
.Sh 解説
.Bf -symbolic
このインタフェースは、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、
.Fn rand
が戻す疑似乱数の新しいシーケンスの種としての引数を設定します。このシー
ケンスは、  
.Fn srand
を同じ種の値で呼び出すことで繰り返せます。
.Pp
種の値を指定しないと、この関数は 1を種として自動的に使用します。
.Sh 関連項目
.Xr random 3
.Sh 規格
.Fn rand
関数と
.Fn srand
関数は、
.St -ansiC
に準拠しています。