On 27 Abr, 21:37, Krzysztof Mitko <kmi...@[EMAIL PROTECTED]
> wrote:
> carvalho.mig...@[EMAIL PROTECTED]
twierdzi, =BFe:
>
> > im trying to generate a double precision random number between 0 and
> > 1, but i keep getting 0 only.
> > static double randomDouble()
> > {
> > return static_cast<double>(rand() / RAND_MAX);
> > }
>
> RAND_MAX is an integer
>
> rand() returns an integer
>
> (rand() / RAND_MAX) is a division of integer by integer, suprisingly
> giving the integer :). Further cast doesn't matter, since you can only
> get 0 or 1 (if rand() results in RAND_MAX value).
> One of them should be a double. My manual says that the proper formula
> is:
>
> return rand() / (RAND_MAX + 1.0);
>
> --
> If an experiment works, something has gone wrong.
nice, it worked. and you're right i was dividing 2 integers getting a
new integer, really nubish of me.
thanks for the help and explanation =3D)
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