C++: Declaration and Definition of Destructors

Declaration and Definition

A destructor is a special member function that is called when the lifetime of an object ends and destroys the object constructed by the constructor. Normally declared under public.

Illustration14.29 to illustrate destructor function in a class

#include<iostream>

using namespace std;

class simple

{

private:

int a, b;

public:

simple()

{

a= 0 ;

b= 0;

cout<< "\n Constructor of class-simple ";

}

void getdata()

{

cout<<"\n Enter values for a and b (sample data 6 and 7)... ";

cin>>a>>b;

}

void putdata()

{

cout<<"\nThe two integers are .. "<<a<<'\t'<< b<<endl;

cout<<"\n The sum of the variables "<<a<<" + "<<b<<" = "<<a+b;

}

~simple()

{ cout<<”\n Destructor is executed to destroy the object”;} };

int main()

{

simple s;

s.getdata();

s.putdata();

return 0;

}

Output:

Constructor of class-simple

Enter values for a and b (sample data 6 and 7)... 6 7

The two integers are .. 6       7

The sum of the variables 6 + 7 = 13

Destructor is executed to destroy the object