(feat) Take user input for 6.5 number guessing game

It's quite fun actually!

week1.java

@@ -456,36 +456,35 @@ class Lab6 extends Lab {
 
         public six5() {
             super(5);
-            System.out.println(String.format("TODO: get stdin working to user can play"));
             numberGuessingGame();
-            // System.out.println(String.format("Testing randomBetween..."));
-            // int max = 100;
-            // int min = 50;
-            // for (int i=0; i<125; i++) {
-            //     System.out.printf("%d ", randomBetween(min, max));
-            // }
-            // System.out.println(String.format("done."));
         }
 
         public void numberGuessingGame() {
-            final boolean SUPER_ADVANCED_AI = true;
+            final boolean SUPER_ADVANCED_AI = false; // true - simulated guesses, false - stdin
+            final Scanner userInput = new Scanner(System.in);
             final int HIGHEST = 99;
             final int MAX_GUESSES = 10;
+            int guess;
 
-            int chosenNumber = random.nextInt(HIGHEST+1);
-            int guess = random.nextInt(HIGHEST+1);
+            int chosenNumber = random.nextInt(HIGHEST + 1);
             // super advanced AI section
-            int maxPossible = HIGHEST+1;
+            int maxPossible = HIGHEST + 1;
             int minPossible = 0;
 
             String guesses = "guess"; // for correct plurals
 
+            if (SUPER_ADVANCED_AI) {
+                guess = random.nextInt(HIGHEST+1);
+            } else {
+                guess = getUserGuess(userInput);
+            }
             System.out.printf("Guessing...\t");
             for (int i = 0; i < MAX_GUESSES; i++ ) {
                 System.out.printf("%d", guess);
                 if (guess == chosenNumber) {
                     System.out.println(String.format("\nYou guessed right after %d %s! It was indeed %d",
                                                      i+1, guesses, chosenNumber));
+                    userInput.close();
                     return;
                 }
                 guesses = "guesses"; // didn't get it on the first try
@@ -503,11 +502,14 @@ class Lab6 extends Lab {
                 // but that's kinda boring and robotic
                 if (SUPER_ADVANCED_AI) {
                     guess = randomBetween(minPossible, maxPossible);
+                } else {
+                    guess = getUserGuess(userInput);
                 }
                 // TODO change the behaviour so it doesn't guess the same number in a row
             }
 
             System.out.println(String.format("\nThe answer was: %d. Better luck next time!", chosenNumber));
+            userInput.close();
 
         }
 
@@ -517,6 +519,13 @@ class Lab6 extends Lab {
             // System.out.printf(" random.nextInt(%d - %d) + %d ", max, min, min);
             return (random.nextInt(max - min) + min);
         }
+
+        public int getUserGuess(Scanner userInput) {
+                System.out.println(String.format("Please enter an integer between 0 and 99 to guess"));
+                int guess = userInput.nextInt();
+                userInput.nextLine();
+                return guess;
+        }
     }
     /**
      * Produce a number triangle