If you have a C function that returns a random number between 0 and some max limit, say like:

n = rand(int max);

A function that accepts a minimum and a maximum limit would simply be:
n = random(min, max);
where....

int random(int min, int max)
{
return (min + rand(max));
}

easy :-))
Of course, it will work even if you write your own pseudo-random rand(max) function.
BTW I hope this is somehow related to 8051, coz else I just replied to an off-topic post!!

Kundi