What are virtual functions in C++?

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

Sure! Virtual functions in C++ are member functions in a base class that you expect to override in derived classes.

Why do we need virtual functions?

They enable polymorphism, allowing you to call derived class methods through base class pointers or references.

Can you give me an example of how to use virtual functions?

Of course! Here's a simple example:

class Base {
public:
    virtual void show() { cout << "Base class"; }
};

class Derived : public Base {
public:
    void show() override { cout << "Derived class"; }
};

Base* b = new Derived();
b->show(); // Outputs: Derived class