Question

所以我应该创建一个程序，生成1到1000之间的100个随机整数，然后告诉返回偶数和奇数的整数。到目前为止，我已经完成了那部分工作。然而，第二部分我无法弄清楚。我需要做同样的事情10次，然后我需要将所有这些加在一起以获得总数。

import java.util.Random;

public class EvenOrOdd
{
  public static void main(String[] args)
  {
    int even = 0, odd = 0;
    int iteration = 0;

    while (iteration<10)
    {
      for(int i = 0; i<100;i++)
      {
        int number2 = random.nextInt(1000) + 1;
        if ((number2 % 2) == 0)
        {
          even++;
        }
        else if ((number2 % 2) == 1)
        {
          odd++;
        }

      }
      System.out.println("Iteration " + " Evens " + " Odds");
        iteration++;
      System.out.println(iteration + "          " + even + "     " + odd);
        iteration++;
      System.out.println(iteration + "          " + even + "     " + odd);
        iteration++;
      System.out.println(iteration + "          " + even + "     " + odd);
        iteration++;
      System.out.println(iteration + "          " + even + "     " + odd);
        iteration++;
      System.out.println(iteration + "          " + even + "     " + odd);
        iteration++;
      System.out.println(iteration + "          " + even + "     " + odd);
        iteration++;
      System.out.println(iteration + "          " + even + "     " + odd);
        iteration++;
      System.out.println(iteration + "          " + even + "     " + odd);
        iteration++;
      System.out.println(iteration + "          " + even + "     " + odd);
        iteration++;
      System.out.println(iteration + "         " + even + "     " + odd);
    }
    System.out.println("\nEvens: " + even + "\nOdds:  " + odd);
  }
}

我试过拿出

System.out.println("Iteration " + " Evens " + " Odds");

并将其放在while循环上方，然后除去其中一个

    iteration++;
  System.out.println(iteration + "          " + even + "     " + odd);

但是当我这样做时，我的平均值和赔率几乎翻倍。

所以重复我想再做的事情：我想每个人都这样做

    iteration++;
  System.out.println(iteration + "          " + even + "     " + odd);

显示一个新的偶数和奇数，而不是相同的。然后，由于我不确定如何做到这一点，我想总计十个平均值和十个赔率。谢谢你的帮助！

Answer 1

你几乎就在那里，主要问题是你在while循环中增加了10次迭代，所以它会立即从while循环中退出。我刚刚删除了所有这些增量，它确实有效！

此外，在while循环外部有一个偶数和奇数的总计数器，然后在while循环中每次迭代后加总，如下所示：

public class EvenOrOdd {

    public static void main(String[] args) {

        Random random = new Random();
        int evenTotal = 0, oddTotal = 0;
        int iteration = 0;

        System.out.println("Iteration " + " Evens " + " Odds");

        while (iteration < 10) {
            int even = 0, odd = 0;
            for (int i = 0; i < 100; i++) {
                int number2 = random.nextInt(1000) + 1;
                if ((number2 % 2) == 0)
                    even++;
                else if ((number2 % 2) == 1)
                    odd++;

            }
            iteration++;
            System.out.println(iteration + "          " + even + "     " + odd);
            evenTotal += even;
            oddTotal += odd;
        }
        System.out.println("\nEvens: " + evenTotal + "\nOdds:  " + oddTotal);
    }

}

Java：随机类建议

1 个答案: