What's the Difference Between an Abstract Class and a Can-Do Relationship?

The main point of an abstract class is you want to make sure that there's some concrete implementation defined, and then you want the user of that class to add on to that with their specific use cases. So all of these things that we've said here are describing a can-do relationship. You definitely trying to define some piece of it. And you're actually assigning storage for members that you want to have available - whether they be public or private or whatever.