Message-Id: <199803240715.JAA31075@ankara.duzen.com.tr>
From: "S. M. Halloran" <mitch AT duzen DOT com DOT tr>
Organization: User RFC 822- and 1123-compliant
To: "Nathan Cournia" <nac2b AT frank DOT mtsu DOT edu>
Date: Tue, 24 Mar 1998 09:19:27 +0200
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Subject: Re: Random interger numbers
CC: djgpp AT delorie DOT com
In-reply-to: <01bd56dd$5d636c80$0f02000a@frank.mtsu.edu.frank.mtsu.edu>
Precedence: bulk

On 24 Mar 98 Nathan Cournia was found to have commented thusly:

> 	How do I produce a random interger number between 0 and n.  Right now I'm
> using the following code:
> 
> 	return (((int)((double)rand()/(double)RAND_MAX))*n);
> 
> 	Unfortunately this equation always produces the result of 0.  What I need
> is a function that will act as a (n) sided dice.  Thanks for the help.
> 

Try this one out:

     return (rand() % n);

I think it works almost every time.

Yeah, I know, it looks too simple.  I have pounded my hand into my head of 
this and other supposedly simple problems in the past.  Your approach of 
course would occur to any thoughtful mathematician, but engineers always 
seem to find ways to frustrate mathematicians.

Mitch Halloran
Research (Bio)chemist
Duzen Laboratories Group
Ankara   TURKEY
mitch AT duzen DOT com DOT tr

other job title:  Sequoia's (dob 12-20-95) daddy