What is the override keyword in C++?

What is the override keyword in C++?

The override keyword in C++ is used to indicate that a member function is intended to override a virtual function in a base class.

Can you give me an example of how to use it?

Sure! Here's a simple example:

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

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

In this example, show() in Derived overrides the show() function in Base.

What happens if I don't use the override keyword?

If you don't use the override keyword, the compiler won't check if the function is actually overriding a base class function. This can lead to subtle bugs if the function signatures don't match.

Is it mandatory to use the override keyword?

No, it's not mandatory, but it's highly recommended as it improves code readability and helps catch errors.