Slip 6 - A) Write a C++ program to create two Classes Square and Rectangle. Compare area of both the shapes using friend function. Accept appropriate data members for both the classes.

Solution:

#include<iostream>

using namespace std;

class Square {

    public:

        int s;

        void getdata() {

            cout << "Enter the side of the square: ";

            cin >> s;

        }

        int calArea() {

            return (s*s);

        }

        friend void compare(int s, int r);

};

class Rectangle {

    public:

        int l, w;

        void getdata() {

            cout << "Enter the length of the rectangle: ";

            cin >> l;

            cout << "Enter the width of the rectangle: ";

            cin >> w;

        }

        int calArea() {

            return (l*w);

        }

        friend void compare(int s, int r);

};

void compare(int s, int r) {

    if(s > r) {

        cout << "The area of square is bigger than area of rectangle." << endl;

    } else {

        cout << "The area of rectangle is bigger than area of square." << endl;

    }

}

int main() {

    int s_area, r_area;

    Square s1;

    Rectangle r1;

    s1.getdata();

    s_area = s1.calArea();

    r1.getdata();

    r_area = r1.calArea();

    cout << "Square: " << s_area << endl;

    cout << "Rectangle: " << r_area << endl;

    compare(s_area, r_area);

    return 0;

}