//

// Inheritance example

//

// Shape -> Rectangle -> Square

//

#include <iostream>

using namespace std;

// Base class

class Shape {

protected:

int width, height;

public:

Shape(int w, int h) {

width = w;

height = h;

}

void setDimensions(int w, int h) {

width = w;

height = h;

}

};

// New class Rectangle based on Shape class

class Rectangle: public Shape {

public:

Rectangle (int w, int h) : Shape(w, h) {};

int getArea() {

return (width * height);

}

};

class Triangle: public Shape {

public:

Triangle (int w, int h) : Shape(w, h) {};

double getArea() {

return ((double)width * (double)height/2);

}

};

class Square: public Rectangle {

public:

Square (int side) : Rectangle (side, side) { };

};

int main() {

Rectangle r(3, 4);

Triangle t(3, 4);

Square s(3);

cout << "Rectangle area: " << r.getArea() << endl;

cout << "Triangle area: " << t.getArea() << endl;

cout << "Square area: " << s.getArea() << endl;

return 0;

}