#include <iostream>
using namespace std;

class Aaa {
public:
	virtual void print() = 0;
};

class Bbb : public Aaa {
	int i;
public:
	Bbb(int _i){
		i = _i;
	}
	void print(){
		cout << i << endl;
	}
};

int main(){
	Aaa* a  = new Bbb(10);
	a->print();
}