Answer Posted / pradeep

This example fully describe the need of Virtual Destructor
in base class:-
----------------------------------------------------------
#include <iostream.h>
#include <stdio.h>
class Base
{
public:
Base(){ cout<<"Constructor: Base"<<endl;}
~Base(){ cout<<"Destructor : Base"<<endl;}
};
class Derived: public Base
{
//Doing a lot of jobs by extending the functionality
public:
Derived(){ cout<<"Constructor: Derived"<<endl;}
~Derived(){ cout<<"Destructor : Derived"<<endl;}
};
void main()
{
Base *Var = new Derived();
delete Var;
getch();
}

-----------------------------------------------------------
When it will be executed..it will show only that Base Class
destructor executed not the Derived.
But if we make Base class destructor "virtual"
(i.e. virtual ~Base(){ cout<<"Destructor : Base"<<endl;} )
then we can verify that Destructor execute into this order:--
1. Derived class destructor
2. Base class destructor

---If there is any mistake kindly let me know.
Thanks...!!!

Explain explicit container.

821

---

What are move semantics?

850

---

To which numbering system can the binary number 1101100100111100 be easily converted to?

786

---

What are the c++ access specifiers?

1019

---

What is c++ course?

765

---

---

Should I learn c or c++ first?

808

---

Distinguish between new and malloc and delete and free().

738

---

write a program that withdrawals,deposits,balance check,shows mini statement. (using functions,pointers and arrays)

1997

---

What are references in c++? What is a local reference?

765

---

What is the meaning of string in c++?

755

---

List down the guideline that should be followed while using friend function.

809

---

Explain how the virtual base class is different from the conventional base classes of the opps.

876

---

What is iterator c++?

697

---

How do I use turbo c++?

707

---

Who created c++?

771

---