c++, In the classroom use the files bellow as a starting point for creating an inherited class called Box from the class Rectangle. It will enhance the Rectangle class by adding a 3rd dimension to the shape.

#include

using namespace std;

class Polygon {

protected:

int width, height;

public:

void set_values(int a, int b)

{

width = a; height = b;

}

virtual int area()

{

return 0;

}

};

class Rectangle : public Polygon {

public:

int area()

{

return width * height;

}

};

class Triangle : public Polygon {

public:

int area()

{

return (width * height / 2);

}

};

int main() {

Rectangle rect;

Triangle trgl;

Polygon poly;

Polygon * ppoly1 = ▭

Polygon * ppoly2 = &trgl;

Polygon * ppoly3 = &poly;

ppoly1->set_values(4, 5);

ppoly2->set_values(4, 5);

ppoly3->set_values(4, 5);

cout << ppoly1->area() << ' ';

cout << ppoly2->area() << ' ';

cout << ppoly3->area() << ' ';

return 0;

}