Warum sagt es, dass ich nichts falsch mache?

Question

In diesem Programm soll ich zurückgeben, wie viele Fragen ich richtig oder falsch habe. Aber unabhängig davon, was ich ablege, wird es sagen, dass ich 20 Fragen richtig und 0 falsch habe. Wer weiß, wie man das repariert, damit es genauer ist?

Klasse:

public class KNW_DriverExam 
{ 
    //Create the arrays/Declare variable 
    //Intialize theAnswers array 
    private String[] theAnswers = {"B" , "D" , "A" , "A" , "C" , 
           "A" , "B" , "A" , "C" , "D" , 
           "B" , "C" , "D" , "A" , "D" , 
           "C" , "C" , "B" , "D" , "A" }; 
    private String[] userAnswers; 
    int[] missed = new int [theAnswers.length]; 

    /**The DriverExam method, recieves answers 
    * @param Answer, the answer 
    * */ 
    public KNW_DriverExam(String[] Answer) 
    { 
    userAnswers = new String[theAnswers.length]; 

    for(int i = 0; i < theAnswers.length; i++) 
    { 
     userAnswers[i] = theAnswers[i]; 
    } 
    } 

    /**The passed method, see if user passes or fails 
    * @return true if user passed 
    * @return false if user failed 
    * */ 
    public boolean passed() 
    { 
    if(totalCorrect()>=15) 
    { 
     return true; 
    } 
    else 
    { 
     return false; 
    } 
    } 

    /**The totalCorrect method, see how many user got right 
    * @return correctCount, how many the user got right 
    * */ 
    public int totalCorrect() 
    { 
    int correctCount = 0; 

    for(int i = 0; i < theAnswers.length; i++) 
    { 
     if(userAnswers[i].equalsIgnoreCase(theAnswers[i])) 
     { 
     correctCount++; 
     } 
    } 
    return correctCount; 
    } 

    /**The totalIncorrect method, how many the user got wrong 
    * @return incorrectCount, how many the user got wrong 
    * */ 
    public int totalIncorrect() 
    { 
    int incorrectCount = 0; 

    for(int i = 0; i < theAnswers.length; i++) 
    { 
     if(!(userAnswers[i].equalsIgnoreCase(theAnswers[i]))) 
     { 
     missed[incorrectCount] = i; 
     incorrectCount++; 
     } 
    } 
    return incorrectCount; 
    } 

    /**The missedQuestions method, how many quetions user missed. 
    * @return missed, missed questions 
    * */ 
    public int[] questionsMissed() 
    { 
    return missed; 
    } 
} 

Demo:

import java.util.Scanner; 

public class KNW_DriverExamDemo 
{ 
    public static void main(String[] args) 
    { 
    Scanner input = new Scanner(System.in); 

    System.out.println("Driver's Exam/n"); 
    System.out.println("20 Multiple Choice Questions Mark A,B,C,D"); 

    //Inputting string 
    String[] answers = new String[20]; 
    String answer; 

    for(int i = 0; i < 20; i++) 
    { 
     do 
     { 
     System.out.println((i + 1) + ": "); 
     answer = input.nextLine(); 
     } 
     while(!isValidAnswer(answer)); 
     { 

     answers[i] = answer; 
     } 
    } 

    KNW_DriverExam exam = new KNW_DriverExam(answers); 

    System.out.println("Results\n\n"); 

    System.out.println("Total Correct: " + exam.totalCorrect() + "\n"); 
    System.out.println("Total Incorrect: " + exam.totalIncorrect() + "\n"); 

    if(exam.totalIncorrect() > 0) 
    { 
     System.out.println("The Incorrect Answers Are: "); 
     int missedIndex; 

     for(int i = 0; i < exam.totalIncorrect(); i++) 
     { 
     missedIndex = exam.questionsMissed()[i] + 1; 
     System.out.println(" " + missedIndex); 
     } 
    } 
    } 

    public static boolean isValidAnswer(String answer) 
    { 
    return "A".equalsIgnoreCase(answer) || 
     "B".equalsIgnoreCase(answer) || 
     "C".equalsIgnoreCase(answer) || 
     "D".equalsIgnoreCase(answer); 
    } 

}

Answer 1

einen Blick auf Ihre Konstruktor nehmen. Wenn Sie userAnswers zuweisen, verwenden Sie theAnswers und nicht die mitgelieferte Answer.

public KNW_DriverExam(String[] Answer) { 
    userAnswers = new String[Answers.length]; 

    for(int i = 0; i < Answers.length; i++) { 
     userAnswers[i] = Answers[i]; 
    } 
}