commit

CSA_mathGame/CSA_mathGame.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>

CSA_mathGame/CSA_mathGame.slnx

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

CSA_mathGame/Program.cs

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+string[] menuOptions = { "CSharpAcademy - MathGame\n", "1 - Start", "2 - Random mode", "3 - Scoreboard", "4 - Exit", "Enter menu option # & press enter:" };
+//program terminator
+bool exit = false;
+
+//scoring
+int currentScore = 0;
+int[] highScores = new int[10];
+Array.Fill(highScores, 0);
+//counter for current game number, used to store score in highScores array and reset when it reaches the end of the array.
+int gameCounter = 0;
+
+const int RANDOMQUESTIONAMOUNT = 5;
+
+//pre-set question data
+int[,] questionData = new int[5, 3]
+{
+    //value1, value2, sign 0-3 (+ - * /)
+    {50, 10, 3},
+    {7, 8, 2},
+    {6, 2, 1},
+    {5, 3, 0},
+    {12, 2, 3},
+};
+
+
+//main loop
+while (!exit)
+{
+    showMainMenu();
+    readUserMenuInput();
+}
+
+//Show main menu.
+void showMainMenu()
+{
+    foreach (string s in menuOptions)
+    {
+        Console.WriteLine(s);
+    }
+}
+
+//Read user input and execute corresponding action.
+void readUserMenuInput()
+{
+    switch (Console.ReadLine())
+    {
+        case "1":
+            startGame();
+            break;
+        case "2":
+            startRandomGame();
+            break;
+        case "3":
+            ShowScoreboard();
+            break;
+        case "4":
+            //Change exit bool/flag to true to exit the program.
+            exit = true;
+            break;
+        default:
+            Console.WriteLine("Invalid input. Please enter a number between 1 and 4.");
+            readUserMenuInput();
+            break;
+    }
+}
+
+//Show question and calc answer based on given values and symbol, return answer.
+int ShowQuestion(int value1, int value2, int symbol, int questionNumber)
+{
+    //set symbol string based, calc answer, ask question, and return answer
+    string symbolString = "";
+    int calculatedAnswer = -1;
+    string userAnswer = "";
+    int userAnswerNumber = 0;
+
+    switch(symbol)
+    {
+        case 0:
+            symbolString = "+";
+            calculatedAnswer = value1 + value2;
+            break;
+        case 1:
+            symbolString = "-";
+            calculatedAnswer = value1 - value2;
+            break;
+        case 2:
+            symbolString = "*";
+            calculatedAnswer = value1 * value2;
+            break;
+        case 3:
+            symbolString = "/";
+            calculatedAnswer = value1 / value2;
+            break;
+    }
+
+    Console.WriteLine($"Question {questionNumber}: What is {value1} {symbolString} {value2}?");
+    return calculatedAnswer;
+
+}
+
+void ShowScoreboard()
+{
+    Console.Clear();
+    Console.WriteLine("--- SCOREBOARD (last 10 games) ---\n");
+    for (int i = 0; i < highScores.Length; i++)
+    {
+        Console.WriteLine($"{highScores[i]} points");
+    }
+    Console.WriteLine("\n{ PRESS ENTER TO RETURN THE MAIN MENU }");
+    Console.ReadLine();
+    Console.Clear();
+}
+
+void startGame()
+{
+    Console.Clear();
+    int consoleInput;
+    int solution;
+    //Ask questions from the bank
+    for(int i = 0; i< questionData.GetLength(0); i++)
+    {
+        solution = ShowQuestion(questionData[i, 0], questionData[i, 1], questionData[i,2], i+1);        
+        if(int.TryParse(Console.ReadLine(), out consoleInput))
+        {
+            if(consoleInput == solution)
+            {
+                currentScore++;
+                Console.WriteLine("Correct!");
+            }
+            else
+            {
+                Console.WriteLine("Incorrect.");
+            }
+        }
+        else
+        {
+            Console.WriteLine("Invalid input. Please enter a number.");
+            //go back to the previous loop iteration.
+            i = i-1;
+        }
+
+    }
+    EndGame();
+}
+
+void startRandomGame()
+{
+    Console.Clear();
+    //used to so that a new question is not generated when bad input is detected & we restart the loop.
+    bool generateRandoms = true;
+    int consoleInput;
+    int solution;
+    int[] randomQuestionData = new int[3];
+
+    for (int i = 0; i < RANDOMQUESTIONAMOUNT; i++)
+    {
+        if (generateRandoms)
+        {
+            randomQuestionData = GetRandomQuestionData();
+        }
+        solution = ShowQuestion(randomQuestionData[0], randomQuestionData[1], randomQuestionData[2], i + 1);
+        if (int.TryParse(Console.ReadLine(), out consoleInput))
+        {
+            if (consoleInput == solution)
+            {
+                currentScore++;
+                Console.WriteLine("Correct!");
+            }
+            else
+            {
+                Console.WriteLine("Incorrect.");
+            }
+            generateRandoms = true;
+        }
+        else
+        {
+            Console.WriteLine("Invalid input. Please enter a number.");
+            generateRandoms = false;
+            //repeat this iteration of the loop.
+            i = i-1;
+        }
+    }
+    EndGame();
+}
+
+void EndGame()
+{
+    //Store score
+    highScores[gameCounter] = currentScore;
+    gameCounter++;
+    //reset game counter
+    if (gameCounter >= highScores.Length)
+    {
+        gameCounter = 0;
+    }
+    //End of game
+    Console.WriteLine($"\nGAME OVER! Your score is {currentScore}.\n");
+    Console.WriteLine("{ PRESS ENTER TO RETURN THE MAIN MENU }");
+    Console.ReadLine();
+    Console.Clear();
+}
+
+int[] GetRandomQuestionData()
+{
+    //determine sign
+    int sign = Random.Shared.Next(0, 4);
+    int value1 = 0;
+    int value2 = 0;
+    if (sign == 3)
+    {
+        while (true)
+        {
+            value1 = Random.Shared.Next(1, 100);
+            value2 = Random.Shared.Next(1, 100);
+
+            if((value1 % value2) == 0)
+            {
+                //value found that can be divided without remainder, break loop and return values.
+                break;
+            }
+        }
+    }
+    else
+    {
+        value1 = Random.Shared.Next(1, 100);
+        value2 = Random.Shared.Next(1, 100);
+    }
+
+    return new int[] { value1, value2, sign };
+}