使用数组&；Java中的循环

我想要一个零数据、50个名字和数字的输入文件。我使用循环和数组来保存名称和数字。我认为我的数组或循环语句有问题

import java.util.Scanner;
import java.io.FileInputStream;
import java.io.FileNotFoundException; 
import java.io.PrintWriter;
import java.io.FileOutputStream;

public class StudentParty 

{
    public static void main(String[] args)

    {
        String name1;
        double number1;
        String name2;
        double number2;
        String name3;
        double number3;
        double count = 3;
        double total = 0;
        double average;
        String [] name = new String [50];
        String [] number = new String [50];

        Scanner fileIn = null;
        PrintWriter OutputStream = null;

        try
        {
            fileIn = new Scanner    
            (new FileInputStream
                    ("StudentPartyInput.txt"));
            OutputStream = new PrintWriter(new FileOutputStream
                    ("StudentPartyOutput.txt")); 
        }

        catch (FileNotFoundException e)
        {
            System.out.println("File not foud.");
            System.exit(0);
        }

        while (fileIn.hasNextLine())
                {
                    line = fileIn.nextLine();
                    count++;
                    name1 = fileIn.nextLine();
                    number1 = fileIn.nextDouble();
                    fileIn.nextLine(); 
                    total = total + number1;
                }

        average = total / count; 
        fileIn.close();

        OutputStream.println(); 
        OutputStream.println(name1 + " had " + (number1 - average) + " more drinks than the average ");
        OutputStream.println(name2 + " had " + (number2 - average) + " more drinks than the average ");
        OutputStream.println(name3 + " had " + (number3 - average) + " more drinks than the average ");
        OutputStream.close();   
    }

}

---

我假设您的示例输入与此非常相似

sample One
120.00 
sample Two
130.92
sample three
140.34

我已经修改了你的代码。。在您的代码中，您使用了太多冗余变量，如name1、number1和all。。。我已经通过数组声明删除了所有这些。。。。试试这个

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.util.Scanner;

    public class StudentParty 

    {
        public static void main(String[] args)

        {
            double total = 0;
            double average;
            String [] name = new String [50];
            Double [] number = new Double [50];

            Scanner fileIn = null;
            PrintWriter OutputStream = null;

            try
            {
                fileIn = new Scanner    
                (new FileInputStream
                        ("StudentPartyInput.txt"));
                OutputStream = new PrintWriter(new FileOutputStream
                        ("StudentPartyOutput.txt")); 
            }

            catch (FileNotFoundException e)
            {
                System.out.println("File not found.");
                System.exit(0);
            }
             int cnt=0;
            while (fileIn.hasNextLine())
                    {
                        name[cnt]=fileIn.nextLine();
                        number[cnt] = Double.valueOf(fileIn.next());
                        total = total + number[cnt];
                        cnt++;
                        if(fileIn.hasNextLine()) fileIn.nextLine();
                    }

            average = total / (double)cnt; 
            fileIn.close();
            OutputStream.println(); 
            OutputStream.println(name[0] + " had " + (number[0] - average) + " more drinks than the average ");
            OutputStream.println(name[1] + " had " + (number[1] - average) + " more drinks than the average ");
            OutputStream.println(name[2] + " had " + (number[2] - average) + " more drinks than the average ");
            OutputStream.close();   
        }

    }

预计的样品O/p为

sample One had -10.419999999999987 more drinks than the average 
sample Two had 0.5 more drinks than the average 
sample three had 9.920000000000016 more drinks than the average 

---

是什么让你觉得有什么不对劲？当你试图编译你的代码时，你会遇到错误吗？当您尝试运行代码时，是否出现错误？您是否得到意外的输出？请编辑您的问题并添加相关详细信息。您是否得到意外结果或任何编译错误？？您没有声明变量行。。。您必须获得编译错误。请考虑扫描仪是一个Bug类。维克多说得很公平，不过我仍然会对你使用的“车”、“不工作”和“错误”等词进行争论。但我会让它成为现实。这是我个人的建议。非常感谢！终于成功了！我花了很多时间在谷歌上搜索如何使用循环和数组，但每次我改变一件事，就会发生另一个错误。谢谢大家!^-^