Hello, can someone please fix my code? It runs perfect but I'm having trouble with the...

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Question

Hello, can someone please fix my code? It runs perfect but I'm having trouble with the...

Hello, can someone please fix my code? It runs perfect but I'm having trouble with the index for the incorrect answer array; please run some tests to ensure the code runs properly, thank you! Here is the code:

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import java.util.Scanner;

public class DriverTest{

final static int QuestionTotal = 10;

public static void main(String[] args){

       // scanner and answer key
       Scanner scan = new Scanner(System.in);
       final char[] answers = {'A', 'B', 'C', 'D', 'A', 'B', 'C', 'D', 'A', 'B'};
       final char[] studentAnswers = new char[10];

       // general prompt
       System.out.println();
       System.out.println("You are taking an exam that has 10 questions (using capital letters A, B, C, D).");
       System.out.println("You need at least 5 correct answers to pass. Enter your answers below: ");

       // user input prompt (returns char input starting at 0 index)
       for(int i = 0; i < studentAnswers.length; i++){
           System.out.print("Question " + (i+1) + ": ");
           String userInput = scan.nextLine();
           studentAnswers[i] = userInput.charAt(0);
       }

       int incorrect = correctAnswers(answers, studentAnswers);
       int[] incorrectAnswerArray = new int[incorrect];
       int correct = QuestionTotal - incorrect;
       incorrectAnswerArray = missedAnswers(answers, studentAnswers, incorrect);

// *************************************************************************

       // final results
       System.out.print("** Correct answers: ");
       System.out.println(correct);
       System.out.print("** Incorrect answers: ");
       System.out.println(incorrect);

       if(correct >= 5){
           System.out.println("** You passed the exam.");
       } else
           System.out.println("** You failed the exam!");

       if(correct == 10){
           System.out.println("** Perfect score!");
       } else
           System.out.println("You missed the following questions: ");

       // printing our array of incorrect answers
       for(int i = 0; i < incorrectAnswerArray.length; i++) {
           System.out.print(incorrectAnswerArray[i] + " ");
       }

           System.out.println();
   }

// *************************************************************************

public static int correctAnswers(char[] answers, char[] studentAnswers){

// counts correct answers; increments if it matches answers
int correctCounter = 0;

       for (int i = 0; i < answers.length; i++){
           if(studentAnswers[i] == (answers[i])){
               correctCounter++;
           }
       }

       //calculating incorrect answers
       int incorrectAnswers = QuestionTotal - correctCounter;
           return incorrectAnswers;
   }

// *************************************************************************

public static int[] missedAnswers(char[] answers, char[] studentAnswers, int incorrect){

       // creates array of missed answers
       int[] missed = new int[incorrect];
       int incorrectCounter = 0;

       for (int i = 0; i < answers.length; i++) {
           if (studentAnswers[i] != answers[i]){
               missed[incorrectCounter] = i;
               incorrectCounter++;
           }
       }

return missed;
}
}

engineering Computer-Science

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Answer 1

Answer #1

CORRECTED PROGRAM

import java.util.Scanner;

public class DriverTest{

final static int QuestionTotal = 10;

public static void main(String[] args){

       // scanner and answer key
       Scanner scan = new Scanner(System.in);
       final char[] answers = {'A', 'B', 'C', 'D', 'A', 'B', 'C', 'D', 'A', 'B'};
       final char[] studentAnswers = new char[10];

       // general prompt
       System.out.println();
       System.out.println("You are taking an exam that has 10 questions (using capital letters A, B, C, D).");
       System.out.println("You need at least 5 correct answers to pass. Enter your answers below: ");

       // user input prompt (returns char input starting at 0 index)
       for(int i = 0; i < studentAnswers.length; i++){
           System.out.print("Question " + (i+1) + ": ");
           String userInput = scan.nextLine();
           studentAnswers[i] = userInput.charAt(0);
       }

       int incorrect = correctAnswers(answers, studentAnswers);
       int[] incorrectAnswerArray = new int[incorrect];
       int correct = QuestionTotal - incorrect;
       incorrectAnswerArray = missedAnswers(answers, studentAnswers, incorrect);

// *************************************************************************

       // final results
       System.out.print("** Correct answers: ");
       System.out.println(correct);
       System.out.print("** Incorrect answers: ");
       System.out.println(incorrect);

       if(correct >= 5){
           System.out.println("** You passed the exam.");
       } else
           System.out.println("** You failed the exam!");

       if(correct == 10){
           System.out.println("** Perfect score!");
       } else
           System.out.println("You missed the following questions: ");

       // printing our array of incorrect answers
       for(int i = 0; i <incorrectAnswerArray.length; i++) {
           System.out.print(incorrectAnswerArray[i] + " ");
       }

           System.out.println();
   }