Question

问题：编写一个程序来计算公司中5个小时工薪酬员工的工资。您的计划将为5名员工中的每一位员工输入员工ID，他们工作的小时数和他/她的工资率。这些数据将存储在3个并行数组中：employee_ID，hours和payrate。然后，您的程序将调用一个方法来计算每个员工的工资，结果将存储在另一个并行数组中。并排输出4个并行阵列。然后，您的程序将调用3个方法：findAve确定5名员工的平均工资，findMax和findMin以确定并返回分别获得最高和最低工资的员工的ID。结果将以主要方法输出。

麻烦：如何实现方法调用以获得数组平均值？

代码：

 public class Employees {
public static void main(String[] args) {

  // Create a Scanner object for keyboard input.
  Scanner keyboard = new Scanner(System.in);

    int[] id;
    id = new int[5];
    int[] payrate;
    payrate = new int[5];
    int[] wage;
    wage = new int[5];
    final int EMPLOYEES = 5;           // Number of employees
  int[] hours = new int[EMPLOYEES];  // Array of hours


  System.out.println("Enter the hours worked by " +
                     EMPLOYEES + " employees.");

  // Get the hours for each employee.
  for (int index = 0; index < EMPLOYEES; index++)
  {
     System.out.print("Employee " + (index + 1) + ": ");
     hours[index] = keyboard.nextInt();
  }

  System.out.println("The hours you entered are:");

  // Display the values entered.
  for (int index = 0; index < EMPLOYEES; index++)
     System.out.println(hours[index]);

  System.out.println("Enter the payrate worked by " +
                     EMPLOYEES + " employees.");
  // Get the payrate for each employee.
  for (int index1 = 0; index1 < EMPLOYEES; index1++)
  {
     System.out.print("Employee " + (index1 + 1) + ": ");
     payrate[index1] = keyboard.nextInt();
  }

  System.out.println("The payrate you entered are:");

  // Display the values entered.
  for (int index1 = 0; index1 < EMPLOYEES; index1++)
     System.out.println(hours[index1]);

  System.out.println("Enter the wage worked by " +
                     EMPLOYEES + " employees.");
  // Get the wage for each employee.
  for (int index2 = 0; index2 < EMPLOYEES; index2++)
  {
     System.out.print("Employee " + (index2 + 1) + ": ");
     wage[index2] = keyboard.nextInt();
  }

  System.out.println("The wage you entered are:");

  // Display the values entered.
  for (int index2 = 0; index2 < EMPLOYEES; index2++)
     System.out.println(wage[index2]);

}
//A method that calculates and returns the average of a passed array.
public static void calculateAverage (int[] wage)
{
    int average = 0;
    int total = 0;

    for (int i=0; i<=wage.length; i++)
    {
        total += wage[i];
    }       
    average = (total / wage.length);
    return;
 }
      System.out.println(average);
}

Answer 1

你已经在Blocked loading mixed active content完成了大部分工作。但是有几个问题。

您希望将for循环设置为https而不是calculateAverage()，因为数组从0开始，所以当实际数组的i<wage.length时，您将得到一个超出范围的例外。即，如果有5名员工，<=其中索引为i = length。
你没有归还任何东西。你已计算出平均值，所以请将其归还。
您需要设置wage.length == 5以外的返回类型。我还建议不要使用整数，以防你的平均值变成小数。您必须先计算0, 1, 2, 3, 4值，然后再进行计算。

粗略修复：

void

之后您的int也无法访问public static double calculateAverage (int[] wage) { double average = 0; int total = 0; for (int i=0; i<wage.length; i++) { total += wage[i]; } average = (double) total / (double) wage.length; return average; }，因为它超出了该方法的范围。你可以这样称呼它：

system.out.println

Answer 2

您的calculateAverage方法返回void，这意味着它不会返回值。你应该让它返回平均值。

PS：对于货币价值，我建议你使用double而不是int。当int没有时，双倍接受十进制值。

public static int calculateAverage (int[] wage)
{
    int average = 0;
    int total = 0;

    for (int i=0; i<wage.length; i++)
    {
        total += wage[i];
    }       
    average = (total / wage.length);
    return average;
 }

方法调用数组以获得平均值

2 个答案: