Add C# version of Awari

04_Awari/csharp/Program.cs

@@ -0,0 +1,98 @@
+using Awari;
+
+Console.WriteLine(Tab(34) + "AWARI");
+Console.WriteLine(Tab(15) + "CREATIVE COMPUTING  MORRISTOWN, NEW JERSEY");
+
+Game game = new();
+
+while (true)
+{
+    game.Reset();
+    DisplayGame();
+
+    while (game.State != GameState.Done)
+    {
+        switch (game.State)
+        {
+            case GameState.PlayerMove:
+                PlayerMove(second: false);
+                break;
+            case GameState.PlayerSecondMove:
+                PlayerMove(second: true);
+                break;
+            case GameState.ComputerMove:
+                ComputerTurn();
+                break;
+        }
+
+        DisplayGame();
+    }
+
+    var outcome = game.GetOutcome();
+
+    string outcomeLabel =
+        outcome.Winner switch
+        {
+            GameWinner.Computer => $"I WIN BY {outcome.Difference} POINTS",
+            GameWinner.Draw => "DRAWN GAME",
+            GameWinner.Player => $"YOU WIN BY {outcome.Difference} POINTS",
+            _ => throw new InvalidOperationException($"Unexpected winner {outcome.Winner}."),
+        };
+    Console.WriteLine(outcomeLabel);
+    Console.WriteLine();
+}
+
+void DisplayGame()
+{
+    // display the computer's pits
+    Console.Write("   ");
+    foreach (var pit in game.ComputerPits.Reverse())
+        Console.Write($"{pit,2} ");
+    Console.WriteLine();
+
+    // display both homes
+    Console.WriteLine($"{game.ComputerHome,2}{Tab(19)}{game.PlayerHome,2}");
+
+    // display the player's pits
+    Console.Write("   ");
+    foreach (var pit in game.PlayerPits)
+        Console.Write($"{pit,2} ");
+    Console.WriteLine();
+
+    Console.WriteLine();
+}
+
+void PlayerMove(bool second = false)
+{
+    int move = GetMove(second);
+    game.PlayerMove(move);
+}
+
+int GetMove(bool second)
+{
+    string prompt = second ? "AGAIN? " : "YOUR MOVE? ";
+
+    while (true)
+    {
+        Console.Write(prompt);
+
+        string input = Console.ReadLine() ?? "";
+
+        // input must be a number between 1 and 6, and the pit must have > 0 beans
+        if (int.TryParse(input, out int move)
+         && game.IsLegalPlayerMove(move))
+            return move;
+
+        Console.WriteLine("ILLEGAL MOVE");
+    }
+}
+
+void ComputerTurn()
+{
+    var moves = game.ComputerTurn();
+    string movesString = string.Join(",", moves);
+
+    Console.WriteLine($"MY MOVE IS {movesString}");
+}
+
+string Tab(int n) => new(' ', n);