Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cs.utexas.edu!helios!stat!john
From: john@stat.tamu.edu (John S. Price)
Newsgroups: comp.lang.c
Subject: Re: randomness
Message-ID: <4878@helios.TAMU.EDU>
Date: 8 Apr 90 23:21:24 GMT
References: <21274@eerie.acsu.Buffalo.EDU>
Sender: usenet@helios.TAMU.EDU
Reply-To: john@stat.tamu.edu (John S. Price)
Organization: Statistics Department, Texas A&M University
Lines: 31

In article <21274@eerie.acsu.Buffalo.EDU> sicolo@acsu.Buffalo.EDU (james sicolo) writes:
>
>	What function must one use to get different sequences of random
>numbers each time the program is run????
>
>	By just using random(), I get the same sequence each time.  Is there
>another function to use ??
>
>							Jim


You need to seed your random number generator.  If you are
using rand(), use srand() to seed the rrandom number generator.
Send srand() some value that you will know change each time
you run the program, like time(NULL).  So, 

...

srand(time(NULL));
...
x = rand();   

...

That's how I do it, anyway...


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John Price                   |   It infuriates me to be wrong
john@stat.tamu.edu           |   when I know I'm right....
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