#include <iostream>
using namespace std;
class B
{
protected:
int x;
public:
B(int i = 3) { x = i; }
virtual B f(B ob) { return x + ob.x; }
void afisare() { cout << x; }
};
class D : public B
{
public:
D(int j = 4) : B(j + 2) { int i = j; }
D f(D ob) { return x + 1; }
};
int main()
{
B *p1 = new D, *p2 = new B, *p3 = new B(p1->f(*p2));
p3->afisare();
return 0;
}