First of all, please surround your code with code tags or it makes it very hard for us to read. Second I would do this with array's, it seems it would make more sense, but this is an assignment.. Last, i would help you but you didn't do really anything just made a base and doesn't show me that you tried much.
I would love to help you but not enough effort was put into what you have so far.
You are not doing anything wrong, you just did not do anything accept for get it ready to be coded...