Implementing https://github.com/coding-horror/basic-computer-games/blob/main/15_Boxing/boxing.bas in C#

15_Boxing/csharp/AttackStrategy.cs

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+namespace Boxing;
+
+public abstract class AttackStrategy
+{
+    protected const int KnockoutDamageThreshold = 35;
+    protected readonly Boxer Other;
+    protected readonly Stack<Action> Work;
+    private readonly Action _notifyGameEnded;
+
+    public AttackStrategy(Boxer other, Stack<Action> work, Action notifyGameEnded)
+    {
+        Other = other;
+        Work = work;
+        _notifyGameEnded = notifyGameEnded;
+    }
+
+    public void Attack()
+    {
+        var punch = GetPunch();
+        if (punch.IsBestPunch)
+        {
+            Other.DamageTaken += 2;
+        }
+        
+        Work.Push(punch.Punch switch
+        {
+            Punch.FullSwing => FullSwing,
+            Punch.Hook => Hook,
+            Punch.Uppercut => Uppercut,
+            _ => Jab
+        });
+    }
+
+    protected abstract AttackPunch GetPunch();
+    protected abstract void FullSwing();
+    protected abstract void Hook();
+    protected abstract void Uppercut();
+    protected abstract void Jab();
+    
+    protected void RegisterKnockout(string knockoutMessage)
+    {
+        Work.Clear();
+        _notifyGameEnded();
+        Console.WriteLine(knockoutMessage);
+    }
+
+    protected record AttackPunch(Punch Punch, bool IsBestPunch);
+}

15_Boxing/csharp/Boxer.cs

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+namespace Boxing;
+
+public class Boxer
+{
+    private int _wins;
+
+    private string Name { get; set; } = string.Empty;
+
+    public Punch BestPunch { get; set; }
+
+    public Punch Vulnerability { get; set; }
+
+    public void SetName(string prompt)
+    {
+        Console.WriteLine(prompt);
+        string? name;
+        do
+        {
+            name = Console.ReadLine();
+        } while (string.IsNullOrWhiteSpace(name));
+        Name = name;
+    }
+
+    public int DamageTaken { get; set; }
+
+    public void ResetForNewRound() => DamageTaken = 0;
+
+    public void RecordWin() => _wins += 1;
+
+    public bool IsWinner => _wins >= 2;
+
+    public override string ToString() => Name;
+}
+
+public class Opponent : Boxer
+{
+    public void SetRandomPunches()
+    {
+        do
+        {
+            BestPunch = (Punch) GameUtils.Roll(4); // B1
+            Vulnerability = (Punch) GameUtils.Roll(4); // D1
+        } while (BestPunch == Vulnerability);
+    }
+}

15_Boxing/csharp/Boxing.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

15_Boxing/csharp/Boxing.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.30114.105
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Boxing", "Boxing.csproj", "{52A7BDE5-3085-4F58-AC57-2BA4E65212D8}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{52A7BDE5-3085-4F58-AC57-2BA4E65212D8}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{52A7BDE5-3085-4F58-AC57-2BA4E65212D8}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{52A7BDE5-3085-4F58-AC57-2BA4E65212D8}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{52A7BDE5-3085-4F58-AC57-2BA4E65212D8}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+EndGlobal

15_Boxing/csharp/OpponentAttackStrategy.cs

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+using static Boxing.GameUtils;
+using static System.Console;
+
+namespace Boxing;
+
+public class OpponentAttackStrategy : AttackStrategy
+{
+    private readonly Opponent _opponent;
+
+    public OpponentAttackStrategy(Opponent opponent, Boxer player,  Action notifyGameEnded, Stack<Action> work) : base(player, work, notifyGameEnded)
+    {
+        _opponent = opponent;
+    }
+
+    protected override AttackPunch GetPunch()
+    {
+        var punch = (Punch)Roll(4);
+        return new AttackPunch(punch, punch == _opponent.BestPunch);
+    }
+
+    protected override void FullSwing() // 720
+    {
+        Write($"{_opponent}  TAKES A FULL SWING AND");
+        if (Other.Vulnerability == Punch.FullSwing)
+        {
+            ScoreFullSwing();
+        }
+        else
+        {
+            if (RollSatisfies(60, x => x < 30))
+            {
+                WriteLine(" IT'S BLOCKED!");
+            }
+            else
+            {
+                ScoreFullSwing();
+            }
+        }
+
+        void ScoreFullSwing()
+        {
+            WriteLine(" POW!!!!! HE HITS HIM RIGHT IN THE FACE!");
+            if (Other.DamageTaken > KnockoutDamageThreshold)
+            {
+                Work.Push(RegisterOtherKnockedOut);
+            }
+            Other.DamageTaken += 15;
+        }
+    }
+
+    protected override void Hook() // 810
+    {
+        Write($"{_opponent} GETS {Other} IN THE JAW (OUCH!)");
+        Other.DamageTaken += 7;
+        WriteLine("....AND AGAIN!");
+        Other.DamageTaken += 5;
+        if (Other.DamageTaken > KnockoutDamageThreshold)
+        {
+            Work.Push(RegisterOtherKnockedOut);
+        }
+    }
+
+    protected override void Uppercut() // 860
+    {
+        Write($"{Other} IS ATTACKED BY AN UPPERCUT (OH,OH)...");
+        if (Other.Vulnerability == Punch.Uppercut)
+        {
+            ScoreUppercut();
+        }
+        else
+        {
+            if (RollSatisfies(200, x => x > 75))
+            {
+                WriteLine($" BLOCKS AND HITS {_opponent} WITH A HOOK.");
+                _opponent.DamageTaken += 5;
+            }
+            else
+            {
+                ScoreUppercut();
+            }
+        }
+
+        void ScoreUppercut()
+        {
+            WriteLine($"AND {_opponent} CONNECTS...");
+            Other.DamageTaken += 8;
+        }
+    }
+
+    protected override void Jab() // 640
+    {
+        Write($"{_opponent}  JABS AND ");
+        if (Other.Vulnerability == Punch.Jab)
+        {
+            ScoreJab();
+        }
+        else
+        {
+            if (RollSatisfies(7, x => x > 4))
+            {
+                WriteLine("BLOOD SPILLS !!!");
+                ScoreJab();
+            }
+            else
+            {
+                WriteLine("IT'S BLOCKED!");
+            }
+        }
+
+        void ScoreJab() => Other.DamageTaken += 5;
+    }
+
+    private void RegisterOtherKnockedOut()
+        => RegisterKnockout($"{Other} IS KNOCKED COLD AND {_opponent} IS THE WINNER AND CHAMP!");
+}

15_Boxing/csharp/PlayerAttackStrategy.cs

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+using static Boxing.GameUtils;
+using static System.Console;
+namespace Boxing;
+
+public class PlayerAttackStrategy : AttackStrategy
+{
+    private readonly Boxer _player;
+
+    public PlayerAttackStrategy(Boxer player, Opponent opponent, Action notifyGameEnded, Stack<Action> work) 
+        : base(opponent, work, notifyGameEnded) => _player = player;
+
+    protected override AttackPunch GetPunch()
+    {
+        var punch = GameUtils.GetPunch($"{_player}'S PUNCH");
+        return new AttackPunch(punch, punch == _player.BestPunch);
+    }
+
+    protected override void FullSwing() // 340
+    {
+        Write($"{_player} SWINGS AND ");
+        if (Other.Vulnerability == Punch.FullSwing)
+        {
+            ScoreFullSwing();
+        }
+        else
+        {
+            if (RollSatisfies(30, x => x < 10))
+            {
+                ScoreFullSwing();
+            }
+            else
+            {
+                WriteLine("HE MISSES");
+            }
+        }
+
+        void ScoreFullSwing()
+        {
+            WriteLine("HE CONNECTS!");
+            if (Other.DamageTaken > KnockoutDamageThreshold)
+            {
+                Work.Push(() => RegisterKnockout($"{Other} IS KNOCKED COLD AND {_player} IS THE WINNER AND CHAMP!"));
+            }
+            Other.DamageTaken += 15;
+        }
+    }
+
+    protected override void Uppercut() // 520
+    {
+        Write($"{_player} TRIES AN UPPERCUT ");
+        if (Other.Vulnerability == Punch.Uppercut)
+        {
+            ScoreUpperCut();
+        }
+        else
+        {
+            if (RollSatisfies(100, x => x < 51))
+            {
+                ScoreUpperCut();
+            }
+            else
+            {
+                WriteLine("AND IT'S BLOCKED (LUCKY BLOCK!)");
+            }
+        }
+
+        void ScoreUpperCut()
+        {
+            WriteLine("AND HE CONNECTS!");
+            Other.DamageTaken += 4;
+        }
+    }
+
+    protected override void Hook() // 450
+    {
+        Write($"{_player} GIVES THE HOOK... ");
+        if (Other.Vulnerability == Punch.Hook)
+        {
+            ScoreHookOnOpponent();
+        }
+        else
+        {
+            if (RollSatisfies(2, x => x == 1))
+            {
+                WriteLine("BUT IT'S BLOCKED!!!!!!!!!!!!!");
+            }
+            else
+            {
+                ScoreHookOnOpponent();
+            }
+        }
+
+        void ScoreHookOnOpponent()
+        {
+            WriteLine("CONNECTS...");
+            Other.DamageTaken += 7;
+        }
+    }
+
+    protected override void Jab()
+    {
+        WriteLine($"{_player} JABS AT {Other}'S HEAD");
+        if (Other.Vulnerability == Punch.Jab)
+        {
+            ScoreJabOnOpponent();
+        }
+        else
+        {
+            if (RollSatisfies(8, x => x < 4))
+            {
+                WriteLine("IT'S BLOCKED.");
+            }
+            else
+            {
+                ScoreJabOnOpponent();
+            }
+        }
+
+        void ScoreJabOnOpponent() => Other.DamageTaken += 3;
+    }
+}

15_Boxing/csharp/Program.cs

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+using Boxing;
+using static Boxing.GameUtils;
+using static System.Console;
+
+WriteLine(new string('\t', 33) + "BOXING");
+WriteLine(new string('\t', 15) + "CREATIVE COMPUTING  MORRISTOWN, NEW JERSEY");
+WriteLine("{0}{0}{0}BOXING OLYMPIC STYLE (3 ROUNDS -- 2 OUT OF 3 WINS){0}", Environment.NewLine);
+
+var opponent = new Opponent(); 
+opponent.SetName("WHAT IS YOUR OPPONENT'S NAME"); // J$
+var player = new Boxer(); 
+player.SetName("INPUT YOUR MAN'S NAME"); // L$
+
+PrintPunchDescription();
+player.BestPunch = GetPunch("WHAT IS YOUR MANS BEST"); // B
+player.Vulnerability = GetPunch("WHAT IS HIS VULNERABILITY"); // D
+opponent.SetRandomPunches();
+WriteLine($"{opponent}'S ADVANTAGE IS {opponent.BestPunch.ToFriendlyString()} AND VULNERABILITY IS SECRET.");
+
+
+for (var i = 1; i <= 3; i ++) // R
+{
+    var round = new Round(player, opponent, i);
+    round.Start();
+    round.CheckOpponentWin();
+    round.CheckPlayerWin();
+    if (round.GameEnded) break;
+}
+WriteLine("{0}{0}AND NOW GOODBYE FROM THE OLYMPIC ARENA.{0}", Environment.NewLine);

15_Boxing/csharp/Punch.cs

@@ -0,0 +1,9 @@
+namespace Boxing;
+
+public enum Punch
+{
+    FullSwing = 1,
+    Hook = 2,
+    Uppercut = 3,
+    Jab = 4
+}

15_Boxing/csharp/Round.cs

@@ -0,0 +1,96 @@
+namespace Boxing;
+
+class Round
+{
+    
+    private readonly Boxer _player;
+    private readonly Boxer _opponent;
+    private readonly int _round;
+    private Stack<Action> _work = new();
+    private readonly PlayerAttackStrategy _playerAttackStrategy;
+    private readonly OpponentAttackStrategy _opponentAttackStrategy;
+    
+    public bool GameEnded { get; private set; }
+
+    public Round(Boxer player, Opponent opponent, int round)
+    {
+        _player = player;
+        _opponent = opponent;
+        _round = round;
+        _work.Push(ResetPlayers);
+        _work.Push(CheckOpponentWin);
+        _work.Push(CheckPlayerWin);
+
+        void NotifyGameEnded() => GameEnded = true;
+        _playerAttackStrategy = new PlayerAttackStrategy(player, opponent, NotifyGameEnded, _work);
+        _opponentAttackStrategy = new OpponentAttackStrategy(opponent, player, NotifyGameEnded, _work);
+    }
+
+    public void Start()
+    {
+        while (_work.Count > 0)
+        {
+            var action = _work.Pop();
+            // This delay does not exist in the VB code but it makes a bit easier to follow the game.
+            // I assume the computers at the time were slow enough
+            // so that they did not need this delay...
+            Thread.Sleep(300); 
+            action();
+        }
+    }
+
+    public void CheckOpponentWin()
+    {
+        if (_opponent.IsWinner)
+        {
+            Console.WriteLine($"{_opponent} WINS (NICE GOING, {_opponent}).");
+            GameEnded = true;
+        }
+    }
+    
+    public void CheckPlayerWin()
+    {
+        if (_player.IsWinner)
+        {
+            Console.WriteLine($"{_player}  AMAZINGLY WINS!!");
+            GameEnded = true;
+        }
+    }
+
+    private void ResetPlayers()
+    {
+        _player.ResetForNewRound();
+        _opponent.ResetForNewRound();
+        _work.Push(RoundBegins);
+    }
+    
+    private void RoundBegins()
+    {
+        Console.WriteLine();
+        Console.WriteLine($"ROUND {_round} BEGINS...");
+        _work.Push(CheckRoundWinner);
+        for (var i = 0; i < 7; i++)
+        {
+            _work.Push(DecideWhoAttacks);
+        }
+    }
+
+    private void CheckRoundWinner()
+    {
+        if (_opponent.DamageTaken > _player.DamageTaken)
+        {
+            Console.WriteLine($"{_player} WINS ROUND {_round}");
+            _player.RecordWin();
+        }
+        else
+        {
+            Console.WriteLine($"{_opponent} WINS ROUND {_round}");
+            _opponent.RecordWin();
+        }
+    }
+
+    private void DecideWhoAttacks()
+    {
+        _work.Push( GameUtils.RollSatisfies(10, x => x > 5) ? _opponentAttackStrategy.Attack : _playerAttackStrategy.Attack );
+    }
+}

15_Boxing/csharp/Utils.cs

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+namespace Boxing;
+public static class GameUtils
+{
+    private static readonly Random Rnd = new((int) DateTime.UtcNow.Ticks);
+    public static void PrintPunchDescription() =>
+        Console.WriteLine($"DIFFERENT PUNCHES ARE: {PunchDesc(Punch.FullSwing)}; {PunchDesc(Punch.Hook)}; {PunchDesc(Punch.Uppercut)}; {PunchDesc(Punch.Jab)}.");
+
+    private static string PunchDesc(Punch punch) => $"({(int)punch}) {punch.ToFriendlyString()}";
+
+    public static Punch GetPunch(string prompt)
+    {
+        Console.WriteLine(prompt);
+        Punch result;
+        while (!Enum.TryParse(Console.ReadLine(), out result) || !Enum.IsDefined(typeof(Punch), result))
+        {
+            PrintPunchDescription();
+        }
+        return result;
+    }
+    
+    public static Func<int, int> Roll { get;  } =  upperLimit => (int) (upperLimit * Rnd.NextSingle()) + 1;
+
+    public static bool RollSatisfies(int upperLimit, Predicate<int> predicate) => predicate(Roll(upperLimit));
+
+    public static string ToFriendlyString(this Punch punch)
+        => punch switch
+        {
+            Punch.FullSwing => "FULL SWING",
+            Punch.Hook => "HOOK",
+            Punch.Uppercut => "UPPERCUT",
+            Punch.Jab => "JAB",
+            _ => throw new ArgumentOutOfRangeException(nameof(punch), punch, null)
+        };
+
+}