How do you declare a class inline?

Question

My homework assignment is telling me to declare a class inline, but I've only heard of declaring functions inline. What does an inline class declaration do, and how do you achieve it?

Answer 1

I think they are just saying that your classes should go in the header, and for convenience all the class methods should be declared inline in the class itself, instead of putting the class methods out-of-line or into a separate CPP.

It's slightly ambiguous but that's how I'd interpret it.