#include <stdlib.h>
#include <stdio.h>
#include <string>
#include <iostream>

using namespace std;

class Shape {
protected:
	int width, height;
public:
	Shape(int a = 0, int b = 0) {
		width = a;
		height = b;
	}

	virtual void area() {
		cout << "Parent class area" << endl;
	}
};

class Rectangle : public Shape {
public:
	Rectangle(int a = 0, int b = 0) : Shape(a, b) {}
	/*Rectangle inicijalizira a i b u argumentnoj linijite poziva roditrljski
	shape kojima daje iste argumente
	,a Shape ih po definiciji stavljau visinu i sirinu,triba imati na umu da poziva
	shape sa istim brojem argumenata*/

	void area() {
		cout << "Rectangle class area : " << (width * height) << endl;
	}
};

class Triangle : public Shape {
public:
	Triangle(int a = 0, int b = 0) : Shape(a, b) {}

	void area() {
		cout << "Triangle class area : " << (width * height / 2) << endl;
	}
};

int main()
{
	Shape *shape[4];
	Rectangle r1(5, 3);
	Rectangle r2(25, 7);
	Triangle t1(2, 6);
	Triangle t2(7, 9);

	shape[0] = &r1;//znaci shape od 0 je pokazivac na r1 ,kao da pise *shape1=&r1
	shape[1] = &r2;
	shape[2] = &t1;
	shape[3] = &t2;

	for (int i = 0; i < 4; i++)
	{
		(*shape[i]).area();
	}

	system("PAUSE");
	return 0;
}