Solution to the Math Game project

MathGame_v2/MathGame_v2.slnx

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+<Solution>
+  <Project Path="MathGame_v2/MathGame_v2.csproj" />
+</Solution>

MathGame_v2/MathGame_v2/GameEngine.cs

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+using MathGame_v2.Model;
+
+namespace MathGame_v2
+{
+    internal class GameEngine
+    {
+        internal void ChosenGame(string? chosenGame)
+        {
+            Console.Clear();
+            Random random = new();
+            int number1;
+            int number2;
+            int score = 0;
+
+            string? mathOperation = chosenGame.ToLower() switch
+            {
+                "a" => "+",
+                "s" => "-",
+                "m" => "*",
+                "d" => "/"
+            };
+
+            for (int i = 0; i < 5; i++)
+            {
+                number1 = mathOperation != "/" ? random.Next(1, 9) : random.Next(1, 99);
+                number2 = mathOperation != "/" ? random.Next(1, 9) : random.Next(1, 99);
+
+                if(mathOperation == "/")
+                {
+                    int[] divisibleNumbers = Helper.GetDivisibleNumbers();
+                    number1 = divisibleNumbers[0];
+                    number2 = divisibleNumbers[1];
+                }
+
+                Console.WriteLine($"{number1} {mathOperation} {number2}");
+                string? answer = Console.ReadLine();
+
+                answer = Helper.ValidateResult(answer);
+
+                int correctAnswer = 0;
+
+                switch (mathOperation)
+                {
+                    case "+":
+                        correctAnswer = number1 + number2;
+                        break;
+                    case "-":
+                        correctAnswer = number1 - number2;
+                        break;
+                    case "*":
+                        correctAnswer = number1 * number2;
+                        break;
+                    case "/":
+                        correctAnswer = number1 / number2;
+                        break;
+                }
+
+                if (Int32.Parse(answer) == correctAnswer)
+                {
+                    Console.WriteLine("Correct!");
+                    score++;                }
+                else
+                {
+                    Console.WriteLine($"Incorrect! Answer is {correctAnswer}");
+                }
+                Console.WriteLine("Press any key for the next question.");
+                Console.ReadLine();
+                if (i == 4)
+                {
+                    Console.WriteLine($"Your score is {score}/{i + 1}");
+                    Helper.AddLog(GameType.Addition, score);
+                    Console.WriteLine("Press any key to return to the menu.");
+                    Console.ReadLine();
+                }
+
+            }
+        }
+        internal void ViewResultsHistory()
+        {
+            Console.Clear();
+            Helper.ViewGameHistory();
+            Console.WriteLine("Press any key to return to menu.");
+            Console.ReadLine();
+        }
+    }
+}

MathGame_v2/MathGame_v2/Helper.cs

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+using MathGame_v2.Model;
+
+namespace MathGame_v2
+{
+    internal class Helper
+    {
+        internal static List<Game> gamesList = new();
+
+        internal static void ViewGameHistory()
+        {
+            foreach(Game game in gamesList)
+            {
+                Console.WriteLine($"{game.Date} {game.Type} - {game.Score} pts");
+            }
+        }
+        internal static void AddLog(GameType gameType, int gameScore)
+        {
+            gamesList.Add(new Game
+            {
+                Date = DateTime.Now,
+                Type = gameType,
+                Score = gameScore
+            });
+        }
+        internal static int[] GetDivisibleNumbers()
+        {
+
+            Random random = new();
+            int number1 = random.Next(1, 99);
+            int number2 = random.Next(1, 99);
+            int[] result = new int[2];
+
+            while (number1 % number2 != 0)
+            {
+                number1 = random.Next(1, 99);
+                number2 = random.Next(1, 99);
+            }
+            result[0] = number1;
+            result[1] = number2;
+            return result;
+        }
+
+        internal static string GetName()
+        {
+            Console.WriteLine("Please enter your name.");
+            var name = Console.ReadLine();
+            while (string.IsNullOrEmpty(name))
+            {
+                Console.WriteLine("Name can't be empty string.");
+                name = Console.ReadLine();
+            }
+            return name;
+        }
+
+        internal static string ValidateResult(string? result)
+        {
+            while (string.IsNullOrEmpty(result) || !Int32.TryParse(result, out _))
+            {
+                Console.WriteLine("Result must be an integer.");
+                result = Console.ReadLine();
+            }
+            return result;
+        }
+
+    }
+}

MathGame_v2/MathGame_v2/MathGame_v2.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net10.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

MathGame_v2/MathGame_v2/Menu.cs

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+namespace MathGame_v2
+{
+    internal class Menu
+    {
+        internal void ShowMenu(string name)
+        {
+            Console.WriteLine($"Hello {name}! Welcome to the Math Games.");
+
+            bool isGameOn = true;
+            do
+            {
+                Console.Clear();
+                Console.WriteLine(@"Select game that you want to play:
+                                a - Addition
+                                s - Subtraction
+                                m - Multiplication
+                                d - Division
+                                q - Leave the game
+                                v - View results history");
+                string? chosenGame = Console.ReadLine();
+                GameEngine engine = new();
+
+                switch (chosenGame.ToLower())
+                {
+                    case "a":
+                        engine.ChosenGame("a");
+                        break;
+                    case "s":
+                        engine.ChosenGame("s");
+                        break;
+                    case "m":
+                        engine.ChosenGame("m");
+                        break;
+                    case "d":
+                        engine.ChosenGame("d");
+                        break;
+                    case "v":
+                        engine.ViewResultsHistory();
+                        break;
+                    case "q":
+                        isGameOn = false;
+                        break;
+                    default:
+                        Console.WriteLine("Bad input.");
+                        break;
+                }
+            } while (isGameOn);
+
+        } 
+    }
+}

MathGame_v2/MathGame_v2/Model/Game.cs

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+namespace MathGame_v2.Model
+{
+    internal class Game
+    {
+        public DateTime Date { get; set; }
+        public GameType Type { get; set; }
+        public int Score { get; set; }
+    }
+    internal enum GameType
+    {
+        Addition,
+        Subtraction,
+        Multiplication,
+        Division
+    }
+}

MathGame_v2/MathGame_v2/Program.cs

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+using MathGame_v2;
+
+Menu menu = new();
+string name = Helper.GetName();
+menu.ShowMenu(name);