static public int fight(Combatant p1, Combatant p2) {
		boolean done = false;
		while (!done) {
			p1.attack(p2);
			p2.attack(p1);
			if (p1.isDefeated() || p2.isDefeated()) {
				done = true;
			}
		}
		return (p1.isDefeated()?1:0) - (p2.isDefeated()?1:0);
	}