Communication between two classes

Hi!
I need to khow all the ways possible to communicatie between tow classes.
I need a way to call a function of a class from a function of another class.
Many thanks!

Could you be a bit more specific? What do you mean with communication?

If you have two classes A and B you can call a method of A from a method of B if either an Object of class A is a member of B or there is an Object of class A inside the method of B:

Code:

---

B::SomeMethodOfB()
{
    A objA;
    objA.SomeMethodOfA();
}

---