Percent Health

Below is the complete code for the Percent Health Try It Out! problem.

using System;
using System.Collections.Generic;
using System.Linq;

namespace QueryExpressions
{
    public class GameObject
    {
        public int ID { get; set; }
        public double X { get; set; }
        public double Y { get; set; }
        public double MaxHP { get; set; }
        public double CurrentHP { get; set; }
        public int PlayerID { get; set; }
    }

    public class Ship : GameObject { }

    public class Player
    {
        public int ID { get; set; }
        public string UserName { get; set; }
        public string TeamColor { get; set; } // A Color class might be better than string here.
    }


    class Program
    {
        static void Main(string[] args)
        {
            List<GameObject> gameObjects = new List<GameObject>();
            gameObjects.Add(new Ship { ID = 1, CurrentHP = 50, MaxHP = 100, PlayerID = 1 });
            gameObjects.Add(new Ship { ID = 2, CurrentHP = 75, MaxHP = 100, PlayerID = 1 });
            gameObjects.Add(new Ship { ID = 3, CurrentHP = 0, MaxHP = 100, PlayerID = 2 });
            gameObjects.Add(new Ship { ID = 3, CurrentHP = 100, MaxHP = 100, PlayerID = 2 });
            gameObjects.Add(new Ship { ID = 3, CurrentHP = 100, MaxHP = 200, PlayerID = 2 });

            List<Player> players = new List<Player>();
            players.Add(new Player { ID = 1, UserName = "Player 1", TeamColor = "Red" });
            players.Add(new Player { ID = 2, UserName = "Player 2", TeamColor = "Blue" });


            var results = from o in gameObjects
                          orderby o.CurrentHP / o.MaxHP
                          group o by o.PlayerID;

            foreach(var group in results)
            {
                Console.WriteLine(group.Key);
                foreach (var item in group)
                    Console.WriteLine("    " + item.CurrentHP + "/" + item.MaxHP +
                        " (" + (int)((item.CurrentHP / item.MaxHP) * 100) + "%)");
            }
            
            Console.ReadKey();
        }
    }
}