Thread: Any ideas how to start??

You must start easy. Start with building one class, make sure it works, then move forward with the next.
For your parking question, I'd suggest a class for it. It should contain all the info that is required for reserving a parking space, and of course, a flag that says if it's reserved or not. You can keep all these classes (120 of them) inside a vector and just look through that vector on your parking places and see if there's one free. It's not the most efficient method, but it's probably the easiest.

I don't know who wrote it, but I think it may have been iMalc - either way: Start by using the simplest method that solves the problem. So a linear search through an array should be a starting point here - doing more complex searches or more complex storage options is probably overkill to solve this problem in general. After all, 120 items in any form of array storage is pretty small in modern systems terms.

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Mats