java - 如何重构此代码并获取数组中所有学生总分的平均值

Question

客户类别

public class Assignment2Q1 {
    public static void main(String[] args) 
    {
        int sum;
        String choice;
        String option;
        Scanner reader = new Scanner(System.in);

            System.out.println("What is your option");
            option = reader.next();
            Student   [] Studentlist ;
            int numofStudent = 0;
            while("Add".equalsIgnoreCase(option))
            {      
               System.out.println("How many student would you like to enter: ");
                        numofStudent=reader.nextInt();
                        Studentlist=new Student [numofStudent];

                        for(int i=0;i<numofStudent;i++)
                        {
                            Studentlist[i] =new Student();
                            Studentlist[i].inputDetails();

                        }
                        System.out.println("What is your option");
                        choice = reader.next();
                        while("TotalAVG".equalsIgnoreCase(choice))
                        {
                            for(int i=0;i<Studentlist.length;i++)
                            {
                                Studentlist[i].avg();
                            }
                            System.out.println("What is your option");
                            choice = reader.next();
                        }


                        System.out.println("What is your option");
                        choice = reader.next();

            }

   //Input Method
    public void inputDetails()
       {
        System.out.println("Please Enter The Score of Assignemt 1:");
        ass01=reader.nextInt();
        System.out.println("Please Enter The Score of Assignemt 2:");
        ass02=reader.nextInt();
        System.out.println("Please Enter The Total Mark of Weekly Pratice Work:");
        weeklyWork=reader.nextInt();
        System.out.println("Please Enter The Score of Final Exam:");
        finalExam=reader.nextInt();
       }

    //Average method
    void avg()
       {
       int count = 0;
       int overallMark =0;
       int sum = 0;
        overallMark = (ass01/5)+(ass02/5)+weeklyWork+(finalExam/2);
        sum = sum+overallMark;
        count = count +1;
        System.out.println("The average: "+(sum/count) );
       }

I have the problem is when I try input TotalAVG,it show me two output

The average: 50

The average: 3

总体分数是在子类中构建的，

1. 如何收集所有总体分数并求其平均值

2. 如何折射此代码？

Answer 1

在你的avg()方法中:

1. 您声明 int sum = 0;，然后向其中添加另一个变量:sum = sum+overallMark;，因此 sum 将始终包含总体评分
2. 另一个类似的问题是 count:您在 avg() 中声明它:int count = 0; 然后添加 1:count = count +1; 因此它的值始终为 1