playing-card/playing-card-operators/PlayingCard.cs - The class PlayingCard with relational operators.

Lecture 6 - slide 4 : 20 Program 4

using System;

public enum CardSuite { Spades, Hearts, Clubs, Diamonds };
public enum CardValue { Ace = 1, Two = 2, Three = 3, Four = 4, Five = 5, 
                        Six = 6, Seven = 7, Eight = 8, Nine = 9, Ten = 10, 
                        Jack = 11, Queen = 12, King = 13};


public class Card{

   private CardSuite suite;
   private CardValue value;

   public Card(CardSuite suite, CardValue value){
     this.suite = suite;
     this.value = value;
   }

   public Card(CardSuite suite, int value){
     this.suite = suite;
     this.value = (CardValue)value;
   }

   public Card(int suite, int value){
     this.suite = (CardSuite)suite;
     this.value = (CardValue)value;
   }

   public CardSuite Suite{
     get { return this.suite; }
   }

   public CardValue Value{
     get { return this.value; }
   }

   public System.Drawing.Color Color{
     get{
       System.Drawing.Color result;
       if (suite == CardSuite.Spades || suite == CardSuite.Clubs)
          result = System.Drawing.Color.Black;
       else
          result = System.Drawing.Color.Red;
          return result;
       }
   }

   public override String ToString(){
     return String.Format("Suite:{0}, Value:{1}, Color:{2}", 
                           suite, value, Color.ToString());
   }

   public override bool Equals(Object other){
      return (this.suite == ((Card)other).suite) && 
             (this.value == ((Card)other).value);
   }

   public override int GetHashCode(){
      return (int)suite ^ (int)value;
   }

   public static bool operator ==(Card c1, Card c2){
     return c1.Equals(c2);
   }

   public static bool operator !=(Card c1, Card c2){
     return !(c1.Equals(c2));
   }

   public static bool operator <(Card c1, Card c2){
     bool res;
     if (c1.suite < c2.suite)
        res = true;
     else if (c1.suite == c2.suite)
        res = (c1.value < c2.value);
     else res = false;
        return res;
   }

   public static bool operator >(Card c1, Card c2){
     return !(c1 < c2) && !(c1 == c2);
   }
}