Beginner's C++

The only things I've covered so far are cin/cout, if/while/for and adding numbers.

Here is the question in the first chapter of C++ Primer (5th edition) that I'm stuck on:

http://ideone.com/4QlDm

here is the bit about the class:

http://ideone.com/tlrsc

This has been wregking my head for days I've been looking gor a solution online but to no avail. A solution with only chapter material would be freatly appreciated. I also can't seem to satisfactorally add Sales_items:

http://ideone.com/XeAx2

and here is Sales_item.h if you want to test your solutions before posting them:

http://ideone.com/U1vCo

Thanks in advance!

>>5

oops, i meant for, not while (I'm a newb).