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Virtual Functions OK, today's topic in Object-Oriented C++ is function dispatch. First, lets review overloading. What is function overloading? Two methods or functions with the same signature. Why

How to fill out virtual functions

How to fill out virtual functions

1. To fill out virtual functions, follow these steps:
2. Start by defining a base class that contains one or more virtual functions. These functions have the 'virtual' keyword in their declaration.
3. Create one or more derived classes that inherit from the base class.
4. In the derived classes, override the virtual functions. This is done by defining a function with the same signature in the derived class. Use the 'override' keyword to indicate that this function is an override of a virtual function from the base class.
5. Each derived class can have its own implementation of the virtual function, providing specific behavior for that class.
6. To use the virtual functions, create objects of the derived classes and assign them to pointers of the base class type.
7. When calling the virtual functions through the base class pointers, the appropriate derived class implementation will be called based on the actual type of the object.

Who needs virtual functions?

1. Virtual functions are useful in object-oriented programming for scenarios where you need to achieve polymorphic behavior.
2. Here are some cases where virtual functions are commonly used:
3. - When you have a base class and want to define a common interface for multiple derived classes, but each derived class may have its own implementation of certain functions.
4. - When you want to implement runtime polymorphism, allowing different objects of derived classes to be stored and used through a base class pointer or reference.
5. - When you want to achieve dynamic dispatch, where the appropriate function implementation is determined at runtime based on the actual object type rather than the declared type of the pointer or reference.
6. In summary, virtual functions are needed in scenarios where you want to work with a common interface but have different behaviors based on the actual objects being used.

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What is virtual functions?

Virtual functions are functions in a base class that are declared in such a way that they are intended to be overridden by derived classes.

Who is required to file virtual functions?

Developers who want to implement polymorphism in C++ are required to use virtual functions.

How to fill out virtual functions?

To fill out virtual functions, create a base class with the virtual keyword before the function declaration, and override the function in any derived classes.

What is the purpose of virtual functions?

The purpose of virtual functions is to allow dynamic binding and runtime polymorphism in C++ programming.

What information must be reported on virtual functions?

Only the function signature is required to be reported when using virtual functions in C++.