// inherit.cpp   public:  protected:  private:
//
// define three classes  A, B, C with variables 1, 2, 3 in
//                       public:  protected: and private: respectively
// Then class D inherits public A, protected B and private C

class A
{
  public:
        int a1;
  protected:
        int a2;
  private:
        int a3;
};

class B
{
  public:
        int b1;
  protected:
        int b2;
  private:
        int b3;
};

class C
{
  public:
        int c1;
  protected:
        int c2;
  private:
        int c3;
};


class D: public A, protected B, private C
{
  public:
        int d1;  // also here  a1
        int test();
  protected:
        int d2;  // also here  a2  b1  b2
  private:
        int d3;  // also here  a3  b3  c1  c2  c3
};

int D::test()
{
  return d1 + a1 + d2 + a2 + b1 + b2 + d3; // all visible inside D

         // not visible  a3  b3  c1  c2  c3  inside D
}

int main()
{
  D object_d;  // object_d has 12 values of type int in memory
  return object_d.d1 + object_d.a1;  // only these are visible outside D

  // not visible  object_d.  a2  a3  b1  b2  b3  c1  c2  c3  d2  d3
}