Re: Generating 2 independent random numbers

From:
Jerry Coffin <jcoffin@taeus.com>
Newsgroups:
comp.lang.c++
Date:
Thu, 29 May 2008 07:25:56 -0600
Message-ID:
<MPG.22a85c89a26aaf11989cf3@news.sunsite.dk>
In article <d6b1612b-98bf-46bd-b70b-
02bb77592f1f@r66g2000hsg.googlegroups.com>, james.kanze@gmail.com
says...

[ ... ]

For example, consider the
following code:

#include <stdlib.h>
#include <iostream>

int main() {
        srand(1);

        int i;

        for (i=0; i<9; i++)
                std::cout << rand() << "\t";
        std::cout << "\n";

        for (; i<RAND_MAX; i++)
                rand();

        for (i=0; i<9; i++)
                std::cout << rand() << "\t";
        std::cout << "\n";
        return 0;
}

According to your statements, the two lines should be
identical (with a possible offset).


If the period of the generator is RAND_MAX, the middle loop
should execute RAND_MAX-9, not RAND_MAX, for the two lines to
be the same.


Look at it again. The initialization part of the second loop is empty.

--
    Later,
    Jerry.

The universe is a figment of its own imagination.

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