Add DriverExam.java

DriverExam.java

@@ -0,0 +1,63 @@
+import java.util.ArrayList;
+
+/**
+ * The DriverExam class holds the correct answers for the drivers test
+ * and handles logic for calculating if the user passed, and displays incorrect answers
+ */
+public class DriverExam {
+    /** Array of correct exam answers. IStatic because it does not change or depends on which
+      * user is taking the exam
+     **/
+    private final static char[] correctAnswers =
+            {'B','D','A','A','C','A','B','A','C','D','B','C','D','A','D','C','C','B','D','A'};
+
+    /** Array of user's answers **/
+    private final char[] givenAnswers;
+    /** Count of correct user answers **/
+    private int totalCorrect;
+    /** Corresponds to each question, each true if correct answer **/
+    private boolean[] missedQuestions;
+
+    /**
+     * Compares givenAnswers to correctAnswers, counting amount correct
+     * Also updates missedQuestions with incorrect answers
+     * @return If user passed exam
+     */
+    public boolean passed() {
+        int correct = 0;
+        for(int i = 0; i < givenAnswers.length; i++) {
+            if(givenAnswers[i] == correctAnswers[i]) {
+                correct++;
+            }
+            else{
+                missedQuestions[i] = true;
+            }
+        }
+        totalCorrect = correct;
+        return correct >= 15;
+    }
+
+    public DriverExam(char[] givenAnswers) {
+        this.givenAnswers = givenAnswers;
+        missedQuestions = new boolean[20];
+    }
+    // Getter methods
+    public int totalCorrect() {
+        return totalCorrect;
+    }
+    public int totalIncorrect() {
+        return 20 - totalCorrect;
+    }
+
+    public ArrayList<Integer> questionsMissed() {
+        ArrayList<Integer> missedNums = new ArrayList<>();
+        for(int i = 0; i < missedQuestions.length; i++) {
+            if(missedQuestions[i]) {
+                missedNums.add(i + 1);
+            }
+        }
+        return missedNums;
+    }
+
+
+}