using System;

// superclass
public class team
{
   protected int wins, losses;  
   public team(int w, int l) {wins=w; losses=l;}
   
//   public int wins() { return wins; }    // accessor  (get) 
//   public void wins(int x) { wins = x; } // modifier  (set)

   public int W  // property replaces 2 methods above
   {
       get {  return wins;
           }
//     set{  if (value>=0) wins = value; // "value" is keyword
//        }
   }
// can now call get and set with just a.W and a.W=...

   public void win() { wins++; }
   public void lose() { losses++; }
   public virtual double wp()
   {  return ((double)wins)/(wins+losses); }
} // class team

public class hockeyteam : team
{
   private int ties;
   public hockeyteam(int w, int l, int t) : base(w,l)
   {
      ties = t;
   }
   public override double wp()
   { return (wins+(ties/2.0))/(wins+losses+ties); 
   }
   public void tie() { ties++; }
}

// note: can have more than one public class in file
public class hkteam
{
  public static void Main()
  {
    team jets = new team(5,0);
    hockeyteam rangers = new hockeyteam(3,3,1);
    jets.lose();
    rangers.tie();
    Console.WriteLine("jets' wp is "+jets.wp());
    Console.WriteLine("rangers' wp is "+rangers.wp());

    // a "polymorphic" array of teams:
    team[] NY = new team[4];
    NY[0] = new team(0,1);
    NY[1] = new team(2,3);
    NY[2] = new hockeyteam(2,4,1);
    NY[3] = new team(2,2);

    // NY[0].tie() - not valid, compile time error
    //((hockeyteam)NY[0].tie();  // compiles but crashes
    // NY[2].tie() - still not valid, static type = team
    ((hockeyteam)NY[2]).tie();  // valid

    printwp(NY);
 }

// prints winning percentage of every team:
 public static void printwp(team[] T)  // note foreach loop
 {
    foreach (team x in T) {Console.WriteLine(x.wp());}
 }

} // hkteam