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C++ Program to show Constructor and Destructor Example

robaa
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2022-11-26
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Write a C++ Program to show Constructor and Destructor Example. Here’s a Simple Program to show Constructor and Destructor Example in C++ Programming Language.

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robaa
2022-11-26
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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 show Constructor and Destructor Example which is successfully compiled and run on Windows System to produce desired output as shown below :

 
 

SOURCE CODE : :

/* C++ Program to show Constructor and Destructor Example  */

#include<iostream>
using namespace std;

class CAdd
{

    public:
                int one;

                CAdd(int two)
                {
                        cout << "\nA constructor is called." << endl;
                        one=two;
                }

                CAdd()
                {
                        cout << "\nA default constructor is called " << endl;
                }

                ~CAdd()
                {
                        cout << "\nDestructing " << one << endl;
                }

                int add()
                {
                        return(one+one);
                }
};

int main()
{
                CAdd myobj1(4);
                CAdd myobj2;

                cout <<"\nThe value in Object1 is :: "<< myobj1.one << endl;
                cout << "\nEnter a number :: " ;

                cin >> myobj2.one;
                cout << myobj2.add()<<endl;

                return(0);
}

OUTPUT : :

/* C++ Program to show Constructor and Destructor Example  */

A constructor is called.

A default constructor is called

The value in Object1 is :: 4

Enter a number :: 8
16

Destructing 8

Destructing 4

Process returned 0

Above is the source code and output for C++ Program to show Constructor and Destructor Example which is successfully compiled and run on Windows System to produce desired output.

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