Virtual Destructor in C++

#include iostream.h

class Base

{

    public:

      Base(){ cout<<"Constructing Base";}

     

     // this is a destructor:

virtual ~Base(){ cout<<"Destroying Base";}

};

class Derive: public Base

{

        public:

        Derive(){ cout<<"Constructing Derive";}

       

        ~Derive(){ cout<<"Destroying Derive";}

 };

void main()

{

    Base *basePtr = new Derive();

        

        delete basePtr;

}

---------------------------------------------------------------------------------------

output

Constructing Base  

Constructing Derive 

Destroying Derive

Destroying Base