#include <iostream>
using namespace std;

class cube {

public:
    double side;

    double volume() {
        return (side * side * side);
    }

    double vvod(){

        cout << endl << "Enter side value: " << endl;
        cin >> side;

        return side;
    }

    double vivod() {

        cout << endl << "Volume of the cube is " << volume() << endl << endl;

        return 0;
    }
}s1;



int main() {

    double volume1 = 0;
    cube c1, c2;

    cout << "Enter the length of the cube: " << endl;
    cin >> c1.side;

    cout << endl << "The volume of the cube is: " << c1.volume() << endl;
    c2.side = c1.side + 2;
    cout << "The volume of the 2nd cube is: " << c2.volume() << endl;

    s1.vvod();
    s1.vivod();

    return 0;

}