#include <iostream>
using namespace std;

class Shape {

    public:
        virtual double getArea() = 0;
        virtual double getPerimeter() = 0;
};

class Square : public Shape {

    public:
        float side;

        virtual double getArea() {
            return side * side;
        }

        virtual double getPerimeter() {
            return 4 * side;
        }
};

class Rectangle : public Shape {

    public:
        float length;
        float breadth;

        virtual double getArea() {
            return length * breadth;
        }

        virtual double getPerimeter() {
            return 2 * (length + breadth);
        }
};

class Circle : public Shape {

    public:
        float radius;

        virtual double getArea() {
            return 3.14 * radius * radius;
        }

        virtual double getPerimeter() {
            return 2 * 3.14 * radius;
        }
};

class Triangle : public Shape {

    public:
        float base;
        float height;
        float side1;
        float side2;

        virtual double getArea() {
            return (base * height) / 2;
        }

        virtual double getPerimeter() {
            return base + side1 + side2;
        }
};


int main() {

Circle circle;
    circle.radius = 10;
    double area = circle.getArea();
    double perimeter = circle.getPerimeter();

    cout << "The area and the perimeter of the circle is " << area << " square units and " << perimeter << " units respectively." << endl;

    return 0;
}