From the course: Nail Your C++ Interview
Join today to access over 24,000 courses taught by industry experts.
Virtual functions in C++ - C++ Tutorial
From the course: Nail Your C++ Interview
Virtual functions in C++
- [Instructor] Virtual functions allow for late binding in C++. The efficiency and power of C++ has mainly been due to its compile time binding. But if virtual functions allow us to define a function in a base class, then in the derived classes, create different implementations. For example, if we were to create a door class, we already have established that a door must open and close, but what if we wrote the open function that included doors swing or hinge movement. A sliding door would not be able to use that implementation of open and we would either need to create a new program, new class, or implement a custom function. If the parent class has an implementation for a function and the child class needs to use a different implementation, they can. This is called overriding. Virtual functions are also a great example of polymorphism. Building on our previous video game example, suppose we were asked to create a…
Practice while you learn with exercise files
Download the files the instructor uses to teach the course. Follow along and learn by watching, listening and practicing.
Download courses and learn on the go
Watch courses on your mobile device without an internet connection. Download courses using your iOS or Android LinkedIn Learning app.