java - 平均分数简化

Question

我写了一个程序，它从一个文件中读取数据，这个文件包含一个学生的名字和每个学生的不定分数，我必须计算平均分数，但我似乎只能让这个程序工作一个具体分数。我该怎么做才能计算出任意数量分数的平均值。顺便说一下，该程序是用 Java 编写的。

    /*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package hw1;
import java.io.*;
import java.util.Scanner;

/**
 *
 * @author admin
 */
public class HW1 {

/**
 * @param args the command line arguments
 */
public static void main(String[] args) {
    // TODO code application logic here

    try
    {
    File file = new File("/Users/admin/Desktop/studentScores.in");  //reads form file

    Scanner scan = new Scanner(file); //scans the file

    while(scan.hasNextInt()) //while the scanner identifies integers
    {
         String name = scan.next();

         String grade1 = scan.next();

         String grade2 = scan.next();

         String grade3 = scan.next(); 

         String grade4 = scan.next(); 

         String grade5 = scan.next(); 

         String grade6 = scan.next(); 

         String grade7 = scan.next(); 

         String grade8 = scan.next(); 

         String grade9 = scan.next(); 

         String grade10 = scan.next(); 

         int average = (Integer.parseInt(grade1) + Integer.parseInt(grade2) + Integer.parseInt(grade3) + Integer.parseInt(grade4) + Integer.parseInt(grade5) + Integer.parseInt(grade6) +Integer.parseInt(grade7) + Integer.parseInt(grade8) +              Integer.parseInt(grade9) + Integer.parseInt(grade10)) / 10;
         //decalre avergae variable and calculate it
         System.out.println("Name:" + name + " Average:" + average); // print the name of the        student and their average
    }
    }

    catch(IOException e)
    {

    }
}
}

Answer 1

此代码将根据需要循环多次。它会先读入名字，然后不断读入数字，直到看到另一个名字。

String next = scan.next();
while(scan.hasNext()) {
    String name = next;
    next = scan.next();
    int total = 0;
    int count = 1;
    while(!next.matches("^[a-zA-Z]*$")) {
        total += Integer.parseInt(next)
        count++
        next = scan.next();
    }
    int average = total/count;
    System.out.println("Name: "+name+" Average: "+average);
}