What are virtual destructors in C++?

Can you explain what virtual destructors are in C++?

Sure! A virtual destructor ensures that the destructor of the derived class is called when an object is deleted through a base class pointer.

Why is it important to have a virtual destructor?

It's important to prevent resource leaks and ensure proper cleanup of derived class resources when using polymorphism.

Can you give me an example of how to implement a virtual destructor?

Certainly! Here's a simple example:

class Base {
public:
    virtual ~Base() { }
};

class Derived : public Base {
public:
    ~Derived() { }
};

In this example, the destructor in the Base class is virtual.

What happens if I forget to declare a destructor as virtual?

If you forget to declare it as virtual, deleting a derived class object through a base class pointer will not call the derived class's destructor, leading to resource leaks.