Added Cards and Deck classes

94 War/csharp/War/War/Cards.cs

@@ -0,0 +1,113 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace War
+{
+    public enum Suit
+    {
+        none = 0,
+        clubs,
+        diamonds,
+        hearts,
+        spades
+    }
+
+    public enum Rank
+    {
+        none = 0,
+        // Skip 1 because ace is high.
+        two = 2,
+        three,
+        four,
+        five,
+        six,
+        seven,
+        eight,
+        nine,
+        ten,
+        jack,
+        queen,
+        king,
+        ace
+    }
+
+    // TODO Testing
+
+    class Card
+    {
+        // TODO Turn into properties, maybe??
+        private Suit suit;
+        private Rank rank;
+
+        public Card(Suit suit, Rank rank) // immutable
+        {
+            this.suit = suit;
+            this.rank = rank;
+        }
+
+        // would normally consider suit and rank but in this case we only want to compare rank.
+        public static bool operator ==(Card lhs, Card rhs)
+        {
+            return lhs.rank == rhs.rank;
+        }
+
+        public static bool operator !=(Card lhs, Card rhs)
+        {
+            return !(lhs == rhs);
+        }
+
+        public static bool operator <(Card lhs, Card rhs)
+        {
+            return lhs.rank < rhs.rank;
+        }
+        public static bool operator >(Card lhs, Card rhs)
+        {
+            return rhs < lhs;
+        }
+        public static bool operator <=(Card lhs, Card rhs)
+        {
+            return !(lhs > rhs);
+        }
+        public static bool operator >=(Card lhs, Card rhs)
+        {
+            return !(lhs < rhs);
+        }
+
+        public override string ToString()
+        {
+            // TODO No need to create the dictionaries each time this is called.
+            // Also make it static.
+            // Is there a C# equivalent of an initializer list?
+            var suitNames = new Dictionary<Suit, string>();
+
+            suitNames[Suit.none]     = "N";
+            suitNames[Suit.clubs]    = "C";
+            suitNames[Suit.diamonds] = "D";
+            suitNames[Suit.hearts]   = "H";
+            suitNames[Suit.spades]   = "S";
+
+            var rankNames = new Dictionary<Rank, string>();
+            rankNames[Rank.none]  = "0";
+            rankNames[Rank.two]   = "2";
+            rankNames[Rank.three] = "3";
+            rankNames[Rank.four]  = "4";
+            rankNames[Rank.five]  = "5";
+            rankNames[Rank.six]   = "6";
+            rankNames[Rank.seven] = "7";
+            rankNames[Rank.eight] = "8";
+            rankNames[Rank.nine]  = "9";
+            rankNames[Rank.ten]   = "10";
+            rankNames[Rank.jack]  = "J";
+            rankNames[Rank.queen] = "Q";
+            rankNames[Rank.king]  = "K";
+            rankNames[Rank.ace]  = "A";
+
+            return $"{suitNames[suit]}-{rankNames[rank]}"; // string interpolation
+        }
+    }
+
+    class Deck
+    {
+    }
+}