13week_8.cpp

#include <iostream>
using namespace std;

class Shape {
protected:
	string name;
	int width, height;
public:
	Shape(string n = "", int w = 0, int h = 0) { name = n; width = w; height = h; }
	virtual double getArea() { return 0; }
	string getName() { return name; }
};
class Oval : public Shape {
public:
	Oval(string n = "", int w = 0, int h = 0) : Shape(n, w, h) { }
	double getArea() {
		return 3.14 * width * height;
	}
};
class Rect : public Shape {
public:
	Rect(string n = "", int w = 0, int h = 0) : Shape(n, w, h) { }
	double getArea() {
		return width * height;
	}
};
class Triangular : public Shape {
public:
	Triangular(string n = "", int w = 0, int h = 0) : Shape(n, w, h) { }
	double getArea() {
		return (width * height) / 2;
	}
};
int main() {
	Shape* p[3];
	p[0] = new Oval("빈대떡", 10, 20);
	p[1] = new Rect("찰떡", 30, 40);
	p[2] = new Triangular("토스트", 30, 40);
	for (int i = 0; i < 3; i++) {
		cout << p[i]->getName() << " 넓이는 " << p[i]->getArea() << endl;
	}
	for (int i = 0; i < 3; i++) {
		delete p[i];
	}
}