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Re: random/3 problems?

From: Daniel Diaz
Subject: Re: random/3 problems?
Date: Mon, 29 Jun 2009 10:00:54 +0200
User-agent: Thunderbird (X11/20090608)

Dave Sworin wrote:
In gprolog 1.3.1 when I run random/3 with the call below I get integers.
The 1.3.1 manual says that if both Base and Max are integers
then Number will be an integer.  I assumed this mean an integer
as determined by integer/1 built-in Prolog predicate.  ???
The work-around is easy enough with random/1 so this is not critical.

There is no bug here, 1.0 is not a Prolog integer.
I also found the following calls to random/3 return the same random number:
:- randomize,random(1,10,M),randomize,random(1,10,N).  M and N are
the same.  This was only tested so far on a very old Fedora 2 platform,
Pentium III and I have not had a chance to try it on a more recent version
of Linux, but it doesn't seem right.  The actual calls where in two(2)
different goals, not right after each other, as shown above.

This is clearly a bug, thank you for the report.


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