srand question

Should I call srand just in main(), or in every function that needs randomosity?

It's best to seed the generator only once in the program :-)

Thanks!

EDIT: This post contained invalid statements, so I have edited it. Sorry for this screw up of mine.

It really doesn't matter how many times you seed it. Just don't do it at EVERY rand, its very inefficient. Always remember to do it at least once in your program, maybe the first statement in main().

I was wrong. I just wrote a short little test and ended up that I was wrong. Here is my test-

Code:

---

#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;

int main()
{
        srand(time(NULL));
        for (int i=0; i < 10; i++)
        {
                cout << rand() % 10;
        }
        return 0;
}

---

Quote:

---

Output-
8
2
7
9
1
4
5
2
1
2

---

So my appologies to everyone. I will edit my post so that no one gets a wrong statement stuck in their head.