Interfaces in C, What they are, how to use them, and why they are so powerful

Getting help online can be difficult. People get mad at you, they do not understand your question, or the answers you get are not correct. What do you do Well, you watch this video and learn how to ask the right question the right way to get the right results. Newsletter signup (with exclusive discounts): (your email will be kept safe and you will not be spammed). Source Code: Design Patterns as referenced in the video 0:00 Intro 1:06 Demo application walkthrough 4:50 Explaining the problem: putting instances of different classes (product models) in one list (shopping cart) 7:54 Creating an interface 12:53 Implementing the interface 20:29 List of type Interface 23:43 Note about items in the List of type Interface: Accessing a Class member not in the contract (Interface) 25:07 recap: basics of the Interface 26:48 Class Inh