~cpp 
#include <iostream>
using namespace std;

class Plane
{
public:
	virtual void Attack() {
		cout << "어택\n";
	}
};

class BBPlane : public Plane
{
public:
	void Attack() {
		cout << "비비탄\n";
	}
};

class SmokPlane : public Plane
{
public:
	void Attack() {
		cout << "연기\n";
	}
};

int main()
{
	Plane* plane;
	plane = new SmokPlane;
	plane->Attack();
	delete plane;
	return 0;
}