Question

提示用户输入五个数字，即五个人的权重。将数字存储在双精度数组中。在一行输出数组的数字，每个数字后跟一个空格。

我尝试过以下代码：

*ngIf

如果我的困惑到处都是，我很抱歉。但总之，我遇到了麻烦：

获取用户输入以在双打中注册。
将这些输入存储在数组中。
以下面显示的方式显示这些值。

import java.util.Scanner;

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


 System.out.println("Enter weight 1: " + reader.nextDouble());
 double weightOne = reader.nextDouble();

 System.out.println("Enter weight 2: " + reader.nextDouble());
 double weightTwo = reader.nextDouble();

 System.out.println("Enter weight 3: " + reader.nextDouble());
 double weightThree = reader.nextDouble();

 System.out.println("Enter weight 4: " + reader.nextDouble());
 double weightFour = reader.nextDouble();

 System.out.println("Enter weight 5: " + reader.nextDouble());
 double weightFive = reader.nextDouble(); /* Type your code here. */

return;
    }
}

Answer 1

首先创建一个数组：

// create array of doubles including 5 fields
double[] MyArray = new double[5];

并使用for循环迭代它并在其中存储值：

for(int x = 0; x < MyArray.length; x = x + 1) 
{
         System.out.println("Enter value: ");
         MyArray[x] = reader.nextDouble();
}

Answer 2

我知道这有点晚了，但是我正在zyBooks实验室进行同样的活动。我注意到上面的代码仅差一点。活动的一部分是使输出看起来像

Enter weight 1: 236
Enter weight 2: 89.5
Enter weight 3: 142
Enter weight 4: 166.3
Enter weight 5: 93

上面的代码将只显示为

Enter weight: 236
Enter weight: 89.5
Enter weight: 142
Enter weight: 166.3
Enter weight: 93

要解决此问题，只需将索引添加到打印语句中就可以对输出进行一些调整

for (i = 0; i < MyArray.length; i = ++i) {
   System.out.println("Enter value " + (i + 1) + ": ");
   MyArray[i] = reader.nextDouble();
}

您需要将1加到索引，否则您将从0开始到4结束。我在下面提供了我的代码，供那些需要对此分配额外帮助的人使用。它确实通过了所有6张支票，但100％可能不是最有效。

import java.util.Scanner;

public class PeopleWeights {
   public static void main(String[] args) {
      /* Type your code here. */
      Scanner scnr = new Scanner(System.in);
      final int NUM_ELEMENTS = 5;
      double[] userVals = new double[NUM_ELEMENTS];
      int i;
      int x;

      for (i = 0; i < NUM_ELEMENTS; ++i) {
         System.out.println("Enter weight " + (i + 1) + ": ");
         userVals[i] = scnr.nextDouble();         
      }  

      System.out.println("");
      System.out.print("You entered: ");
      for (i = 0; i < NUM_ELEMENTS; ++i) {         
         System.out.print(userVals[i] + " ");
      }

      System.out.println("");
      double totalWeight = 0.0;
      for (i = 0; i < NUM_ELEMENTS; ++i) {
         totalWeight += userVals[i];
      }
      System.out.println("Total weight: " + totalWeight);

      double averageWeight = 0.0;
      averageWeight = totalWeight / NUM_ELEMENTS;
      System.out.println("Average weight: " + averageWeight);

      double maxWeight = userVals[0];
      for (i =0; i < NUM_ELEMENTS; ++i) {
         if (userVals[i] > maxWeight) {
            maxWeight = userVals[i];
         }
      }
      System.out.println("Max weight: " + maxWeight);

      return;
   }
}

提示用户输入五个人的体重。然后将它们存储在一个数组中并输出它们

2 个答案: