Class heirarchy help (classes using eachother)

Heya!

I have Class A that uses a variable of Class B and Class B uses a variable of Class A

I'm having issues on how to include them in such a way that I don't get errors. I tried using

Code:

---

#ifndef class_a
#define

 ...

#endif

---

And I did the same for Class B and tried to include them in each other's file but that didn't solve the problem.

Does anyone know a fix for this?

Thanks!
Lang

What you are looking for is called 'forward referencing'.

Code:

---

// this tells the compiler that there is a class 'a', but
// we are not telling the compiler what it looks like
// the compiler will figure that out later...
class a;

class b;
{
public:
  a *some_a_var;

};

---

Cheers!

easy you just need to use a forward declaration to stop the circular dependency:

http://en.wikipedia.org/wiki/Circular_dependency