// A class D with both a private and public base class.
// A very simple illustration of the practical consequences. 

#include <iostream>
#include <string>

using namespace std;

class B {
private:
  int b;
public:
  B(int b): b(b){}
  void Bop(){                                   // Bop is public in B
    cout << "Bop()" << endl;
  }

};

class C {
private:
  int c;
public:
  C(int c): c(c){}
  void Cop(){                                   // Cop is public in C                  
    cout << "Cop()" << endl; 
  }
};

class D : private B, public C {
private:
  int d;
public:
  D(int b, int c, int d): B(b), C(c), d(d){} 
  void Dop(){                                   // Dop is public in D
    Bop();                                      // OK!   Bop used inside D.
    Cop();                                      // OK    Cop is or course visible.
  }

};


int f(D &aD){
// aD.Bop();                                    // Compile error: void B::Bop() is inaccessible in aD's client interface

  aD.Cop();                                     // Output: Cop()

  aD.Dop();                                     // Output: Bop() Cop()
}

int main(){
  D d(1,2,3);
  f(d);
}