Question

I’m having some difficulties with this problem.

The main idea is, I initialized a variable of class type B in class A, class A.h has the variable Z declared as public, like B *Z;

In class A.cpp, I initialized it as Z = new B();

Now, I want to access that variable from class C and I’m unable to do so. C.h includes A.h and B.h

Here goes a bit of code:

Car.h

#include "Model.h"

class Car {
public:

    static Model *Z;

}

Car.cpp

#include "Car.h"

void Car::init() {
    Z = new Model();
}

Model.h

Class Model {}

Camera.h

#include "Model.h"
#include "Car.h"

class Camera {}

Camera.cpp

Camera::init() {
    Car::Z->getPos();
}

Answer 1

I initialized a variable of class type
B in class A

#pragma once
#include "B.h"

class A
{
   public:

   B* Z;
   A()
   { 
      Z = new B();
   }
}

B.h

#pragma once
class B
{ 
}

C.h

#pragma once
#include "A.h"

class C
{ 
   A a; //here you construct A
   C() 
   { 
      a.Z = new B(); //you can read/write Z
   }
}

This should work! Be careful to include the #pragma once or a header guard/include guard (http://en.wikipedia.org/wiki/Header_file) so the headers won’t be included twice (if should have done it).

There are 3 classes, car, model and
camera. in car I declare a new model Z
and I want the camera to follow that
model so I’ll have to access the model
positions in camera class

• A = Car
• B = Model
• C = Camera