C++
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What is Destructor?
A destructor works opposite to constructor; it destructs the objects of classes. It can be defined only once in a class. Like constructors, it is invoked automatically.
A destructor is defined like constructor. It must have same name as class. But it is prefixed with a tilde sign (~).
Destructor is a special class function which destroys the object as soon as the scope of object ends. The destructor is called automatically by the compiler when the object goes out of scope.
The syntax for destructor is same as that for the constructor, the class name is used for the name of destructor, with a tilde ~ sign as prefix to it.
Note :-
Note: C++ destructor cannot have parameters. Moreover, modifiers can't be applied on destructors.
Example :-
#include <iostream>
using namespace std;
class Employee
{
public:
Employee()
{
cout<<"Constructor Invoked"<
~Employee()
{
cout<<"Destructor Invoked"<
};
int main(void)
{
Employee e1; //creating an object of Employee
Employee e2; //creating an object of Employee
return 0;
}
Output :-
Constructor Invoked
Constructor Invoked
Destructor Invoked
Destructor Invoked
Constructor Invoked
Destructor Invoked
Destructor Invoked
Example :-
class A
{
A()
{
cout << "Constructor called";
}
~A()
{
cout << "Destructor called";
}
};
int main()
{
A obj1; // Constructor Called
int x=1
if(x)
{
A obj2; // Constructor Called
} // Destructor Called for obj2
} // Destructor called for obj1