java如何循环文件中的问题

Question

我的程序应该从文件中提取问题并打印它们和答案。然后用户应该回答他们，如果他们答错了，程序应该扣分。每个问题值5分，如果答错了，你就输了2分但是当你出错时，它应该不断地问你这个问题，而不是继续问下一个问题，我该如何解决这个问题？并向用户显示他们还剩下多少点

import java.util.Scanner;

public class HW21 { 
  public static void main(String[] args) {     
    Scanner input = new Scanner(System.in);
    HWData hd = new HWData();
  int currentScore = 5;

int numberOfQuestions = hd.getNumberOfQuestions();
for (int questionIndex=0; questionIndex<numberOfQuestions; ++questionIndex) {
    System.out.println(hd.getQuestion(questionIndex));
    System.out.println();
    System.out.println("1. " + hd.getAnswer1(questionIndex));
    System.out.println();
    System.out.println("2. " + hd.getAnswer2(questionIndex));
    System.out.println();
    System.out.println("3. " + hd.getAnswer3(questionIndex));
    System.out.println();
    System.out.println("4. " + hd.getAnswer4(questionIndex));

    int answer = input.nextInt();

    if (answer == hd.getCorrect(questionIndex)) {
        System.out.println(" Great Job! You got the right answer!");
    }
    else {
        System.out.println(" You got the answer wrong.");
        currentScore -= 2;
    }
}

input.close();
System.out.println("Final score: " + currentScore);

  }

  }

Answer 1

另一个解决方案是将questionIndex减少1，以便循环保持在相同的位置，直到用户正确地获得它。 大概是这样的：

    import java.util.Scanner;

public class HW21 { 
    public static void main(String[] args) {     
        Scanner input = new Scanner(System.in);
        HWData hd = new HWData();
        int currentScore = 5;

        int numberOfQuestions = hd.getNumberOfQuestions();
        for (int questionIndex=0; questionIndex<numberOfQuestions; ++questionIndex) {
            System.out.println(hd.getQuestion(questionIndex));
            System.out.println();
            System.out.println("1. " + hd.getAnswer1(questionIndex));
            System.out.println();
            System.out.println("2. " + hd.getAnswer2(questionIndex));
            System.out.println();
            System.out.println("3. " + hd.getAnswer3(questionIndex));
            System.out.println();
            System.out.println("4. " + hd.getAnswer4(questionIndex));

            int answer = input.nextInt();

            if (answer == hd.getCorrect(questionIndex)) {
                System.out.println(" Great Job! You got the right answer!");
            }
            else {
                System.out.println(" You got the answer wrong.");
                qestionIndex ;
                currentScore -= 2;
            }
        }

        input.close();
        System.out.println("Final score: " + currentScore);

    }

}

Answer 2

我给了你一些伪代码，让你通过。这听起来像是一个家庭作业，因此我不会在这里发布完整的代码

1. Get number of questions 2. Initialize totalScore to 5 // I am taking this from your code snippet 2. For all questions, repeat steps 3. Ask Question i 4. if answer(i) == correct totalScore = totalScore + 5 Move on to next question Else, totalScore = totalScore -2 Print totalScore Go back to Step 3 5. At this step, the loop is done. Print totalScore or whatever actions you need to do

是的，Go back部分需要使用一些flag变量来指示答案是否正确

我希望你现在能解决这个问题。顺便说一下，总的来说，你的代码看起来还不错。你在正确的道路上