Hey, and welcome to TSF. Although we don't do homework i will point you to something that will sort you out =]...
http://www.cprogramming.com/tutorial.html#c++tutorial is a set of free online C++ tutorials, once you've gotten to the 12th you'll be proficcient enough to complete your assignment. It should take between 1 and 3 nights of work so you'll finish within your deadline. And of course if you encounter any problems during the process you can post them in this forum and we'll help you out.
Cheers,
Jamey