While we are more than willing to help those that are stuck, that doesn't mean that we are here to do it all for you! We can't do all the work, you are either getting paid for this, or it's part of your grades and it wouldn't be at all fair for us to do it all for you.
So we need you to do the work, and we will help you when you get stuck. That doesn't mean we will give you a step by step solution you can hand in!
Start by explaining where you are at the moment, and what the next step in the process is. Then tell us what you have tried to get that next step working, and what happened when you did.
And the code you show has nothing to do with the task you describe, even as loosely as you have described it.
To get a value for
you have to do two things:
1) Find the data
and extract it from the rest of the input.
2) Evaluate the
I'd start by reading the actual assignment carefully - it probably contains information that would make both tasks a lot simpler ...
If you are having problems getting started at all, then this may help: How to Write Code to Solve a Problem, A Beginner's Guide