Programming Forums - View Single Post - two classes, call each others functions

deanosrs · Feb 22nd, 2008, 10:10 AM

Hi,
I'm just trying to get two classes to succesfully be able to call functions within each others class. So I effectively have:

(Toggle Plain Text)

// in A's header file
class A {
public:
  B *b;
  void a_function(); // in this function, there's the line b->b_function2
  void a_function2();
};

// in B's header file
class B {
public:
  A *a;
  void b_function(); // in this function, there's the line a->a_function2
  void b_function2();
};

The problem I have at the moment is that I have to include in each header file, the other header file, which it doesn't like. I've also tried forward class definitions, but this doesn't work either, because the line class B; in A's header file isn't sufficient to tell A that B has a function called b_function2().

Any ideas? This has troubled me for a while and is a very difficult problem to google!!

Feb 22nd, 2008, 10:10 AM	#1
deanosrs Programmer Join Date: Apr 2006 Location: Bristol, UK Posts: 31 Rep Power: 0	two classes, call each others functions - how?!! Hi, I'm just trying to get two classes to succesfully be able to call functions within each others class. So I effectively have: (Toggle Plain Text) // in A's header file class A { public: B b; void a_function(); // in this function, there's the line b->b_function2 void a_function2(); }; // in B's header file class B { public: A a; void b_function(); // in this function, there's the line a->a_function2 void b_function2(); }; // in A's header file class A { public: B b; void a_function(); // in this function, there's the line b->b_function2 void a_function2(); }; // in B's header file class B { public: A a; void b_function(); // in this function, there's the line a->a_function2 void b_function2(); }; The problem I have at the moment is that I have to include in each header file, the other header file, which it doesn't like. I've also tried forward class definitions, but this doesn't work either, because the line class B; in A's header file isn't sufficient to tell A that B has a function called b_function2(). Any ideas? This has troubled me for a while and is a very difficult problem to google!!