Question

我不断收到加重的CS0165错误代码。我已经多次重写这个问题，甚至用谷歌搜索了这些问题。我无法解决这个问题，这是一个大学任务，现在已经晚了2天。谁能请帮忙。会很感激。这是下面的代码：

using System;
using System.IO;
//using System.Collections.Generic;
//using System.Linq;
//using System.Text;
//using System.Threading.Tasks;

namespace Assignment_2
{
class Program
{
    static void Main()
    {
        string InputPath = @"C:\Users\....\Desktop\CP Class\Assignment 2\Asgn2InputFile.txt";
        string OutputPath = @"C:\Users\....\Desktop\CP Class\Assignment 2\Payroll.txt";
        using (StreamReader sr = new StreamReader(InputPath))
        using (StreamWriter sw = new StreamWriter(OutputPath))
        {
            // input line
            string InputLine;

            // input fields
            string First;
            string Last;
            int Hours;
            int OverT;
            double Pay;

            // output fields
            double Earnings;
            double Gross;

            //
            sw.Write("NAME".PadRight(11));
            sw.Write("HOURS WORKED ".PadRight(23));
            sw.Write("PAY RATE".PadRight(20));
            sw.Write("OVERTIME".PadRight(27));
            sw.WriteLine();

            while ((InputLine = sr.ReadLine()) != null)

            //  parse input line
            First = InputLine.Substring(0, 5);
            Last = InputLine.Substring(0, 11);
            Pay = double.Parse(InputLine.Substring(31, 5));
            Hours = int.Parse(InputLine.Substring(16, 2));
            OverT = int.Parse(InputLine.Substring(29, 1));

            // 
            Earnings = (Hours * Pay);
            Gross = Earnings + (OverT * (Pay * 1.5));
            sw.Write(First.PadRight(11)); [[ Error Code occurs here ]]
            sw.WriteLine(Last.PadRight(11));

            //
            sw.Write(Earnings.ToString().PadLeft(10) + " @ " + Gross.ToString("C").PadRight(9));
            sw.WriteLine(Earnings.ToString("C").PadLeft(17));
            sw.WriteLine();
            //Total += Earnings;
        }
    }
}
}

Answer 1

错误 CS0165 是因为您使用的是未初始化的变量....

原因是省略 {} 此处

while ((InputLine = sr.ReadLine()) != null)

这意味着，while循环的范围与您需要的东西不同

实际上你的代码相当于：

while ((InputLine = sr.ReadLine()) != null){
      First = InputLine.Substring(0, 5);
}

将其余部分保留为未初始化

Answer 2

由于您的while循环没有任何大括号来阻止其包含的代码，因此只需将第一行代码作为内容。由于编译器无法保证该行将运行，因此可能不会初始化变量First。

所以不要这样做：

while (something)
DoSomething();
DoSomethingElse();

你应该写：

while (something)
{
    DoSomething();
    DoSomethingElse();
}

Answer 3

您的代码中存在多个问题

缺少循环括号
你已经宣布你的变量远离它的第一次使用并使它变得很长以至于很难看到问题

请查看以下代码，我认为这是您想要的

using System;
using System.IO;
//using System.Collections.Generic;
//using System.Linq;
//using System.Text;
//using System.Threading.Tasks;

namespace Assignment_2 {
    class Program {
        static void Main() {
            string InputPath = @"C:\Users\....\Desktop\CP Class\Assignment 2\Asgn2InputFile.txt";
            string OutputPath = @"C:\Users\....\Desktop\CP Class\Assignment 2\Payroll.txt";
            using (StreamReader sr = new StreamReader(InputPath))
            using (StreamWriter sw = new StreamWriter(OutputPath)) {

                sw.Write("NAME".PadRight(11));
                sw.Write("HOURS WORKED ".PadRight(23));
                sw.Write("PAY RATE".PadRight(20));
                sw.Write("OVERTIME".PadRight(27));
                sw.WriteLine();

                // input line
                string InputLine;
                while ((InputLine = sr.ReadLine()) != null) {

                    //  parse input line
                    var First = InputLine.Substring(0, 5);
                    var Last = InputLine.Substring(0, 11);
                    var Pay = double.Parse(InputLine.Substring(31, 5));
                    var Hours = int.Parse(InputLine.Substring(16, 2));
                    var OverT = int.Parse(InputLine.Substring(29, 1));

                    // 
                    var Earnings = (Hours * Pay);
                    var Gross = Earnings + (OverT * (Pay * 1.5));
                    sw.Write(First.PadRight(11)); //Error Code occurs here
                    sw.WriteLine(Last.PadRight(11));

                    //
                    sw.Write(Earnings.ToString().PadLeft(10) + " @ " + Gross.ToString("C").PadRight(9));
                    sw.WriteLine(Earnings.ToString("C").PadLeft(17));
                    sw.WriteLine();
                    //Total += Earnings;
                }
            }
        }
    }
}

继续收到错误代码CS0165

3 个答案: