Simple C++ programs to calculate the volumn of 2 cube

#include<iostream.h>

using namespace std;

class cube

{

            public:

                        double side;

                        double volume()

                        {

                                    return(side*side*side);

                        }

};

                       

int main()

{

            double volume1=0;

            cube c1,c2;

            cout << "Enter the lenght of the cube" << endl;

            cin >> c1.side;

            cout << "The volume of the cube is : " << c1.volume() << endl;

            c2.side=c1.side +2;

            cout << "The volume of the second cube is : " << c2.volume() << endl;

             return(0);

}