驾驶执照考试（为错过的问题获取随机数）

Question

在我的 JAVA 课上布置了一些作业，不得不为驾照考试编写一个程序。它必须有以下方法：

通过。如果学生通过了考试，则返回 true，或者 如果学生失败则为 false

完全正确。返回正确回答的总数 问题

完全不正确。返回错误的总数 回答问题

问题已错过。包含问题编号的 int 数组 学生错过的问题

到目前为止，我做得很好，直到我到达错过的问题部分。我们应该记得错误的更正，但是当我打电话给它时，我得到一个奇怪的数字 [I@55f96302.我在过去的 2 个小时里一直在看这个程序，但我不确定我搞砸了什么。任何帮助将不胜感激。谢谢你

public class DLE {

 private char[] key = { 'B', 'D', 'A', 'A', 'C', 'A', 'B', 'A', 'C', 'D',
                        'B', 'C', 'D', 'A', 'D', 'C', 'C', 'B', 'D', 'A' };
 private char[] answers;



 public DLE(char[] ans)
 {
    answers = ans;
 }

 public boolean passed ()
 {
  return (totalCorrect() > 14);
 }

 public int totalCorrect()
 {
  int correct = 0;
  for (int i = 0; i < key.length; i++)
 {

 if (key[i] == answers[i])
  correct++;
 }
 return correct;
 }

 public int totalMissed()
 {
    int tmissed = 0;
    tmissed = key.length - totalCorrect();
    return tmissed;
 }

 public int[] questionsMissed()
 {

  int size = key.length - totalCorrect();

  int[] missed = {};
  if (size < 1)
  return missed;
  else
  missed = new int [size];

  int pos = 0;
  for (int i = 0; i < key.length; i++)
  {
   if (key[i] != answers[i])
   {
    missed[pos] = (i + 1);
    pos = pos + 1;
   }
  }
  return missed;

 }
}

// 驱动程序

public class driver
{

     public static void main(String[] args)
     {
      // accept keyboard input
       Scanner keyboard = new Scanner(System.in);

      System.out.println("Enter your answers below.\n");

      char[] answers = new char[20];

      // request an answer for each question
      for(int i = 0; i < answers.length; i++)
      {
            // get input until input is valid
            char input;

            do
            {
                  System.out.print(i + 1 + ". ");

                  // get character and make it upper case
                  input = Character.toUpperCase(keyboard.next().charAt(0));
            }
            while(input < 'A' || input >'D');

            // store answer
            answers[i] = input;
      }

      // print output here
      DLE driver = new DLE(answers) {};
      System.out.println();
      System.out.println("You "+(driver.passed()?"passed" : "did not pass") + ".\n");
      System.out.println("Correct: " + driver.totalCorrect() + "\n");
      System.out.println("Incorrect: " + driver.totalMissed() + "\n");
      System.out.println("Questions missed: " + driver.questionsMissed());

  }
}

Answer 1

使用 Arrays.toString() 实用方法打印整数数组。

import java.util.Arrays;
...
System.out.println(Arrays.toString(driver.questionsMissed()));