Building a plugin engine

You might ask yourself why you would want to have a plugin engine. The whole concept is derived out of object-oriented programming. The idea behind it is that certain sections of your code are so specific to the action that you're doing that you don't want to modify your object. A plugin architecture enables you to on-the-fly add features or make changes to the way your object behaves. Although our main topic is not object oriented programming, this will be really helpful for us throughout the next few chapters. If you want to learn more about object oriented programming, please check one of our titles.