Trying to make a ranking system in text based fighting game (newbie)

Hello, I'm really new at C++ programming, but I've been working on a fighting game, and I'm stuck at trying to have a tournament ranking system. I'm trying to make 8 pointers that rank all fighters from top to bottom. Fighters are from 2 classes (one for player, 7 for CPU), and it's being ranked in a different class. If you need code I can post it, but there's a lot. Haha. If anyone has any advice or samples of this, please shoot 'em my way. This looks to be the hardest thing I've done so far, so any help will be greatly appreciated. Thanks in advance!