Question

我是一名AP计算机科学专业的学生，这是作业程序描述：你刚刚开始担任程序员。您已同意以下补偿方案。

•您每小时支付30美元。 •如果您工作超过8小时，您每小时可获得额外25.50美元的额外费用 •在任何一周内，您每小时可获得额外15美元的小时数 •您在周六工作时获得的任何金额还可获得125％的奖金，周日工作时可获得50％的奖金。

我使用的工作时间，存储为文件阅读器的txt

9 8 10 8 9 9 5   
7 8 8 8 0 8 9   
6 10 5 0 0 0 0   
8 8 8 8 8 8 8   
6 6 6 6 6 6 6  
10 3 4 5 7 5 4  
8 8 8 8 8 0 0

示例输出:(确保通过向数据文件添加其他数据来运行您自己的几个测试用例）

Hours Worked: 9 8 10 8 9 9 5        
Week # 1 $2581.88   
Hours Worked: 7 8 8 8 0 8 9    
Week # 2 $2033.25   
Hours Worked: 6 10 5 0 0 0 0  
Week # 3 $681   
Hours Worked: End of reading from file.   

Vs My output  
Total Hours Worked: 58

Week #1 $2010.00

Total Hours Worked: 48

Week #2 $1560.00

Total Hours Worked: 21

Week #3 $630.00

Total Hours Worked: 56

Week #4 $1920.00

Total Hours Worked: 42

Week #5 $1290.00

Total Hours Worked: 38

Week #6 $1140.00

Total Hours Worked: 40

Week #7 $1200.00

Hours Worked: End of reading from file.

问题我看到for循环中发生的事情不会影响我的代码外部，我发现这令人困惑。

请不要更改整个代码，我也想了解当前级别的代码，以便我可以学习和进步，谢谢！

import java.util.*;
import java.io.*;
import java.text.*;
public class wages {
    public static void main(String[] args) {
        Scanner inFile = null;
        int TotalW = 0; // total hours per week
        int TotalD = 0; // total hours per day
        double Wage = 0.0; // Wage for the weekdays
        double WageS = 0.0; // wage for sat
        double WageSu = 0.0; // wage for Sundays
        double Total = Wage + WageS + WageSu;
        int week = 1; // week # counter
        DecimalFormat TD = new DecimalFormat("0.00"); // formatter
        try {
            // Create a scanner to read the file, file name is parameter
            inFile = new Scanner(new File("Prog213a.txt"));
        } catch (FileNotFoundException e) {
            System.out.println("File not found!");
            // Stop program if no file found
            System.exit(0);
        }

        while (inFile.hasNext()) // as long as there is a next variable...
        {
            for (int x = 1; x <= 5; x++) // count the week days / first 5 variables
            {
                TotalD = inFile.nextInt();
                if (TotalD > 8) Wage = Wage + ((TotalD - 8) * 25.50); // bonus if worked above 8 hours per day

                TotalW = TotalW + TotalD;
            }
            for (int x = 1; x <= 1; x++) {
                TotalD = inFile.nextInt();
                if (TotalD > 8) WageS = WageS + ((TotalD - 8) * 25.50);
                WageS = WageS + (WageS * 2.25);
                TotalW = TotalW + TotalD;
            }

            for (int x = 1; x <= 1; x++) {
                TotalD = inFile.nextInt();
                if (TotalD > 8) WageSu = WageSu + ((TotalD - 8) * 25.50);
                WageSu = WageSu + (WageSu * 2);
                TotalW = TotalW + TotalD;

            }

            if (TotalW > 40) Total = Total + ((TotalW - 40) * 15);


            Total = Total + (TotalW * 30);
            System.out.println("Total Hours Worked: " + TotalW);
            System.out.println("Week #" + (week++) + " $" + TD.format(Total));

            TotalW = 0;
            TotalD = 0;
            Wage = 0;
            WageS = 0;
            WageSu = 0;
            Total = Wage + WageS + WageSu;
        }
        System.out.println("Hours Worked: End of reading from file. ");
    }
}

Answer 1

如果我了解您的问题，您可能会遇到范围问题。

在范围内声明的任何变量（花括号内的任何内容）只有在您在该范围内时才会持续。

在您的情况下，您的范围是for循环。

例如。

(for int x = 0; x < 10; x++){
    int y = y+x;
}

你的y值在for循环之外是不可访问的。

然而，

如果你这样做：

int y = 0;
(for int x = 0; x < 10; x++){
    y = y+x;
}

您的y值将被保存并在其他地方使用，因为它是在for循环范围之外声明的。

我希望这能回答你的问题。

我还看到你的for循环条件是x <= 1，你声明x = 1。这将导致您的循环只运行一次。也许这就是你的意图。我不确定。

祝你好运。

Answer 2

首先，使用IDE的autoformat正确格式化代码;易于阅读的代码易于推理。

其次，你的for循环是这样的：

              for(int x=1; x<=1; x++) {...}

考虑循环体将执行多少次。

如何更新for循环中更改的变量？

2 个答案: