Tutorial Hotfix

Tutorial.cs

@@ -12,21 +12,22 @@ namespace Mastermind
             Console.WriteLine("The goal of this game is to crack the (randomly) generated Code of which the Length will the determined by the chosen difficulty.\nIn this tutorial the Code will have a length of 4.\n Start by guessing 4 different Numbers with the Range 0 - 9 (0 and 9 are included).");
             foreach (int n in tutorialGuess) //fill array that saves guesses of the user
             {
-                int input = 0;
+                int input = 0; //used for user input
                 bool ret_1 = false;
                 do
                 {
-                    ret_1 = int.TryParse(Console.ReadLine(), out input);
-                    if (ret_1) //ret_1 is a bool, when false if is false; when true if is true
+                    ret_1 = int.TryParse(Console.ReadLine(), out input); //check if user input a number
+                    if (ret_1 == false || input.ToString().Length != 1) //check if user input is a number and if it is a single digit
                     {
-                        ret_1 = true;
-                        tutorialGuess[n] = input;
+                        Console.WriteLine("Please write a single number between 0 and 9."); //if user didn't input Number --> display message to guide User
                     }
-                    Console.WriteLine("Please Write a Number between 0 and 9.");
                 }
-                while (ret_1); //ret_1 is a bool, when false if is false; when true if is true
+                while (ret_1 == false); //repeat if user didn't input a Number
+                //when user did input a Number --> write in array that saves user input 
+                tutorialGuess[n] = input;
             }
-            Console.WriteLine($"{tutorialGuess[0]}, {tutorialGuess[1]}, {tutorialGuess[2]}, {tutorialGuess[3]}");
+            Console.WriteLine($"{tutorialGuess[0]}, {tutorialGuess[1]}, {tutorialGuess[2]}, {tutorialGuess[3]}");//Diese Meldung wird später noch herausgenommen. 
+            Console.WriteLine("Press Q to quit.");//Diese Meldung wird später noch herausgenommen. 
 
         }
     }