Mail Archives: djgpp/1997/06/05/18:24:20
A. Sinan Unur wrote:
>
> Chris wrote:
> >
> > Here is a bit of code from C for Dummies. The book is terrible in
> > most parts, but this is a nice llittle thing it did. It demonstrates
> > how to go about generating random numbers using the computers time.
> >
>
> ok, given the reference, it should not be surprising that you do not
> know the difference between seeding a random number generator and the
> actual algorithm that generates the pseudo-random numbers. a random
> number generator is actually a deterministic algorithm. that is, if you
> give it the same seed, you will get the same sequence out of it each and
> every time. this is actually very desirable for scientific applications.
> however, when you are playing a game, you do not want your hero to start
> at the same corner all the time. so, seeding the rng eith the ticks
> serves the purpose of giving the rng a non-predetermined starting point
> every time, and produce a different series every time.
>
> >
> > int rnd(int range);
> > int seedrnd(void);
>
> what is the point of this? first, your declaration does not match the
> actual function. second, why do something that is essentially renaming a
> standard library function.
>
> >
> > void main(void)
>
> no. int main(void) or int main(int argc, char *argv[]).
>
> > int rnd(int range)
> > {
> > int r;
> > r=rand()%range;
> > return(r);
> > }
> >
>
> the question is whether % preserves the 'statistical randomness' of the
> series generated by rand().
>
> this has been answered in detail before. read those posts and, please,
> for do not quote any dummies book.
>
> -- Sinan.
You seem pretty harsh in your postings. almost to the point of admiring
them.
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