Destructor in C++

Destructor:

• The destructor of the name implies is used to destroy that have been created by the constructor.
• Whose name is the same as the class name but it is preceded by a title (~).

Rules of destructor:

• The destructor should start with a tilde(~) and the same name of the class.
• Destructors do not have parameters and return types.

Uses of destructor:

• Releasing memory of the objects.
• Releasing memory of the pointer variables.
• Closing files and resources.

Syntax:

1. Class class_name
   {
   class_name()//Constructor
   {
             //statements
   }
   ~class_name()//Destructor
   {
             //statements
   }
   };

Example:

1. #include<iostream.h>
   #include<conio.h>
   class example
    {
   int a,b;
   public:
   example(int a1, int b1)
   {
   cout<<"\n Allocates memory for Constructor variables.";
   a = a1;
   b = b1;
   }
   void display()
   {
   cout<<"\n Data members for values are:";
   cout<<"\n a = "<< a;
   cout<<"\n b = "<< b;
   }
   ~example()
   {
   cout<<"\n De-allocates the memory for Constructor variables using destructor";
   }
   };
   int main()
   {
   example obj1(7,8);
   obj1.display();
   getch();
   return 0;
   }

Output:

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