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Message-Id: <200007052211.PAA17557@aleph.ssd.hal.com>
Subject: Re: Random no. problem
To: cygwin AT sourceware DOT cygnus DOT com (Cygwin Mailing List)
Date: Wed, 5 Jul 2000 15:11:39 -0700 (PDT)
In-Reply-To: <20000705154730.21248@cse.cygnus.com> from "Michael Meissner" at Jul 05, 2000 03:47:30 PM
From: "J. J. Farrell" <jjf AT bcs DOT org DOT uk>
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> From: Michael Meissner <meissner AT cygnus DOT com>
> 
> On Wed, Jul 05, 2000 at 02:32:24PM -0400, DJ Delorie wrote:
> > 
> > > Is there a way i can get the same random numbers on Windows NT 4 and
> > > Sun/SGI ?
> > 
> > You can write your own random number generator, and use it instead of
> > the system's generator.  Otherwise, there is *no* standard for random
> > number generators.
> 
> Actually the ISO C standard mandates the algorithm for the weaker 'rand' and
> 'srand' functions.

Is that new in C99 (or whenever the second version was ratified)?
C89 includes an example implementation, but doesn't mandate any
particular algorithm anywhere that I can see.


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