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Document srand

From: Eric S. Raymond
Subject: Document srand
Date: Mon, 16 Jul 2001 21:21:40 -0400

--- pic.ms      2001/07/17 01:18:10     1.2
+++ pic.ms      2001/07/17 01:20:16
@@ -1372,10 +1372,12 @@
 \fBcos(\fIx\fB)\fR, \fBlog(\fIx\fB)\fR, \fBexp(\fIx\fB)\fR,
 \fBsqrt(\fIx\fB)\fR, \fBmax(\fIx\fB,\fIy\fB)\fR,
 \fBatan2(\fIx\fB,\fIy\fB)\fR, \fBmin(\fIx\fB,\fIy\fB)\fR,
-\fBint(\fIx\fB)\fR, and \fBrand()\fP.
+\fBint(\fIx\fB)\fR, \fBrand()\fP, and \fBsrand()\fP.
 Both \fBexp\fP and \fBlog\fP are
-base 10; \fBint\fP does integer truncation; and \fBrand()\fP returns a
-random number in [0-1).
+base 10; \fBint\fP does integer truncation; \fBrand()\fP returns a
+random number in [0-1), and \fBsrand()\fP sets the seed for 
+a new sequence of pseudo-random numbers to be returned by \fBrand()\fP
+(\fBsrand()\fP is a GNU extension).
 GNU \fBgpic\fP also documents a one-argument form or rand,
 \fBrand(\fIx\fB)\fR, which returns a random number between 1 and
                <a href="http://www.tuxedo.org/~esr/";>Eric S. Raymond</a>

Rifles, muskets, long-bows and hand-grenades are inherently democratic
weapons.  A complex weapon makes the strong stronger, while a simple
weapon -- so long as there is no answer to it -- gives claws to the
        -- George Orwell, "You and the Atom Bomb", 1945

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