default random object?

[Lionello Lunesu]

"Steve Schveighoffer" <schveiguy at yahoo.com> wrote in message 
news:gnal9n$19a9$3 at digitalmars.com...
> On Sun, 15 Feb 2009 17:27:38 -0800, Andrei Alexandrescu wrote:
>
>> Ok. Let me just note that rand()%max is a lousy method of generating
>> random numbers between 0 and max-1 and everybody should put that in the
>> bin with Popular Examples That Should Never Be Used, together with
>> exponential Fibonacci, linear-space factorial, and bubblesort.
>
> Do you mean rand()%max specifically in the case of the C function rand
> ()?  Or using %max on any random number generator in general.  If the
> first case, I totally agree, and I found out that from experience first,
> then googling second :)  But if the latter, I wasn't aware that all RNGs
> were bad at randomizing the lower bits, so could you explain why?
>
> It's also possible that Lionello meant the latter case as well.

Actually, I forgot to add that I always use divisors of RAND_MAX ;-)

L.