#include 
    

#include 
    

#include 
    

#include 
    

#include 
    

#include 
    

#include 
    

using namespace std;

class Base

{

public:

Base() {cout << "Base con" << endl;}

virtual ~Base()

{

cout << "Base destructor" << endl;

}

virtual void Hiberarchy() const = 0;

};

void Base::Hiberarchy() const//pure virtual also can have function body

{

cout << "Base::Hiberarchy" << endl;

}

class Derived : public Base

{

public:

Derived() {cout << "Derived con" << endl;}

virtual void Hiberarchy() const

{

Base::Hiberarchy();

cout << "Derived::Hiberarchy" << endl;

}

//    virtual ~Derived()

~Derived()

{

cout << "Derived destructor" << endl;

}

virtual void foo(){cout << "Derived foo()" << endl;}

};

int main()

{

Base *pb = new Derived();

pb->Hiberarchy();

pb->Base::Hiberarchy();

delete pb;

Derived derivedObj;

derivedObj.foo();

//cout <<  << endl;

return 0;

}