#include <iostream>
using namespace std;
#include <typeinfo>
class B {
int i;
public:
B() { i = 1; }
int get_i() { return i; }
};
class D : B {
int j;
public:
D() { j = 2; }
int get_j() { return j; }
};
int main()
{
B* p = new D; //(1)
cout << p->get_i(); //(2)
if (typeid((B*)p).name() == "D*")
cout << ((D*)p)->get_j();
return 0;
}