Thread: keeping stats - probability

How would I determine the probability of a given number occuring in the follow code? Just how bad is the infamous rand()?

Code:

#include<iostream>
#include<ctime>

int main()
{ 
         srand(time(0));
         int testCases = 100;
         for(int i = 1; i <= testCases; i++)
         {
          int x = rand()%20+1;
          std::cout<<x<<'\t';}
         std::cin.get();
         return 0;
}

I need another test loop and 20 variables to increment(?). I'm a little over my head on this.

Thanks -

JM