Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!olivea!uunet!stanford.edu!jackk@shasta.Stanford.EDU
From: jackk@shasta.Stanford.EDU (jackk)
Newsgroups: comp.unix.aix
Subject: Re: drand48()
Keywords: BUG, work as designed
Message-ID: <189@shasta.Stanford.EDU>
Date: 8 May 91 22:39:14 GMT
References: <1991May08.214654.26143@lynx.CS.ORST.EDU>
Organization: Stanford University Computer Systems Laboratory
Lines: 40

In article <1991May08.214654.26143@lynx.CS.ORST.EDU> ghe@physics.orst.edu writes:
>Can anyone tell me what kind result I should expect from the following little
>C program?
>-----
>#include <stdio.h>
>
>main()
>{
>    int i;
>
>    for (i = 0; i < 10; i++)
>        printf("%e\n", drand48());
>}
>-----
>
>The answer I got from a RS/6000 is following:
>1.531272e-154
>1.531272e-154
>1.531272e-154
>
>While the answer from a SUN is
>3.964646e-01
>8.404851e-01
>
>What is the problem on RS/6000? Is it a BUG in drand48() or is it 'work
>as designed'??? :-( :-(
>

Please read the manual pages for this function. The SUN manual says
quite clearly:

srand48(), seed48(), and lcong48() are initialization  entry
     points,  one  of  which  should  be  invoked  before  either
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     drand48(), lrand48(), or mrand48() is called.
 ^^^^^^^^^^^^^^^^

Try following the directions and see if it works.

Jack