C++ Program to calculate Volume of Cube using constructor

What is Class and Objects in C++?

• Class is a user defined data type, which holds its own data members and member functions, which can be accessed and used by creating instance of that class.
• The variables inside class definition are called as data members and the functions are called member functions.
• Class is just a blue print, which declares and defines characteristics and behavior, namely data members and member functions respectively. And all objects of this class will share these characteristics and behavior.

• Objects are instances of class, which holds the data variables declared in class and the member functions work on these class objects.
• Each object has different data variables. Objects are initialized using special class functions called Constructors.

Below is the source code for C++ Program to calculate Volume of Cube using constructor and destructor which is successfully compiled and run on Windows System to produce desired output as shown below :

SOURCE CODE : :

/*  C++ Program to calculate Volume of Cube using constructor  */

#include<iostream>

using namespace std;



class cube

{

            public:

                        double side;

                        double volume()

                        {

                            return(side*side*side);

                        }

                        cube(double side1)

                        {

                            cout << "\nA constructor is called" << endl;

                            side=side1;

                        }

                        cube()

                        {

                            cout << "\nA default constructor is called " << endl;

                        }

                        ~cube()

                        {

                            cout << "\nDestructing " << side << endl;

                        }

};



int main()

{

            cube c1(2.34);

            cube c2;

            cout << "\nThe side of the cube is: " << c1.side << endl;

            cout << "\nThe volume of the first cube is : " << c1.volume() << endl;

            cout << "\nEnter the length of the second cube : " ;

            cin >> c2.side;

            cout << "\nThe volume of second cube is : " << c2.volume() << endl;

            return(0);

}

OUTPUT : :

/*  C++ Program to calculate Volume of Cube using constructor  */

A constructor is called

A default constructor is called

The side of the cube is: 2.34

The volume of the first cube is : 12.8129

Enter the length of the second cube : 4

The volume of second cube is : 64

Destructing 4

Destructing 2.34

Process returned 0

Above is the source code and output for C++ Program to calculate Volume of Cube using constructor which is successfully compiled and run on Windows System to produce desired output.