Access a cross referenced class function inside anoter function

victor vs (2)
Hi!, this is my first post in the forum and it's sad it's not an answer but a question, well... I'm starting with c++.

My problem is that I have two cross referenced classes, A and B. A has a pointer B *myb and B has a pointer A* mya, the constructor of the class B need a pointer to an A-object.

I want to call an A-function using the pointer mya in B, there's no problem if I call the function from the outside of the B class, let's say in the main(). But if I call the function from inside the B class, let's say mya-> theFunction() inside a B-function, the compiler kick me off.

In the sample code bellow I have the clases defined in diferent files (to simulate the real programing enviroment), there is an A class and a B class, both with the cross referenced pointer and with the A-function void A::sayHello() to be executed from B. You can see that if you compile the code it wouldn't give any problem, but uncommenting the line //mya->sayHello() in b.cpp the compiler complains.

I need to know why is this happening and how can I solve it, I know it could be because of my ignorance or bad pointer manipulation.

Thanks :)

=================== fileneame: a.h ====================== 
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#ifndef _A_H_
#define _A_H_
class B;
class A{
    public:
	B *myb;
	void sayHello();
};
#endif //_A_H_

================== filename: a.cpp ======================
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#include "a.h"
#include <iostream>
void A::sayHello(){
    std::cout<< "Hello from A inside B" << std::endl;
}

=================== filename: b.h =======================
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#ifndef _B_H_
#define _B_H_
class A;
class B{
    public:
	B(A *aa);
	void sayBye();
	A *mya;

};
#endif //_B_H_

=================== filename: b.cpp =====================
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#include "b.h"
#include <iostream>

B::B(A *aa){
    mya = aa;
}
void B::sayBye()
    // Here is the problem, uncommenting the line bellow
    // the compiler kick me off
    //mya->sayHello(); 
}

=================== filename: main.cpp ==================
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#include "a.h"
#include "b.h"

int main(){
    A aaa;
    A * a = &aaa;
    B bbb(a);
    bbb.mya->sayHello();
    //I would like to use bbb.sayBye() insted the above line :(
    return 0;
}

ne555 (10692)
You will need to add #include "a.h" in b.cpp
victor vs (2)
thanks!... it was so simple I feel like a dumb... now everything works!
:D
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