Thread: When to srand()?

Hello!

Quick Q:

If a class needs the random number generator to work right, should I srand() in the constructor?

Will this cause problems in the program is srand() is called elsewhere?

Or should I just call srand in the main() of any program using that class?

Is there any convention on this?

> Or should I just call srand in the main() of any program using that class
This is probably the best option

Typically, you do
srand(time(NULL));

But for a short-lived program, time() effectively returns a constant, so if you had

Code:

for ( i = 0 ; i < 10 ; i++ ) {
    srand(time(NULL));
    cout << "Rand=" << rand()%100 << endl;
}

You'll always end up with the same answers