如何从文本文件中读取数字，并从文本文件中输出每行的总和 [英] How can I read numbers from a textfile and output sum for each line from a textfile

问题描述

Read in a series of numbers from a text-file (the data is given below). For each row in the file, setup a thread to calculate the sum of the values of that vector. Each of the vector sums must then be written to a new file, sorted in ascending order.
Input files contents:
6,12,2,9,17
7,3,15,19,4
10,5,8,21,13

我尝试过：

What I have tried:

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

namespace Test1
{
    class Program
    {
        static void Main(string[] args)
        {
            string filePath = @"C:Test.txt";
            string line;

            if (File.Exists(filePath))
            {
                StreamReader file = null;
                try
                {
                    file = new StreamReader(filePath);
                    while ((line = file.ReadLine()) != null)
                    {
                        Console.WriteLine(line);
                    }
                }
                finally
                {
                    if (file != null)
                        file.Close();
                }
            }

            Console.ReadLine();
        }
    }
    
}

推荐答案

这是你的作业 - 所以我不会给你代码。

我不打扰StreamReader：

This is your homework - so I won't give you the code.
I wouldn't bother with a StreamReader:

string[] lines = File.ReadAllLines(pathToFile);

这样做会好的。然后，您可以使用 foreach 循环来处理每个字符串。

在循环内部，设置一个线程（BackgroundWorker可能是最简单的方法）处理每一行。

在线程中使用string.Split来打破每个逗号上的行：

Will do it fine. You can then use a foreach loop to process each string.
Inside the loop, set up a thread (a BackgroundWorker is probably the easiest way) to process each line.
In the thread use string.Split to break the line on each comma:

string[] parts = line.Split(',');

然后您可以在每个字符串上使用int.TryParse将其转换为数字。

然后您可以计算出向量和并返回它是主线程。

主线程组合所有总和，将它们聚合在一个集合中，对集合进行排序，并将它们写入新文件。



一次做一点，这一切都很简单！

You can then use int.TryParse on each string to convert it to a number.
You can then work out the vector sum and return it to the main thread.
The main thread assembles all the sums, aggregates them in a collection, sorts the collection, and writes them to the new file.

Do it a bit at a time, and it's all pretty simple stuff!

谢谢我在这里做的功课是一个解决方案

Thank I did my homework here is a solution

using System;
using System.IO;

namespace Test1
{
    class Program
    {
        static void Main(string[] args)
        {
            // Read the data.txt textfile.
            var data = System.IO.File.ReadAllText(@"..\..\Reading.txt");

            // Create a new List of float[]
            var arrays = new List<float[]> ();

            // Split data file content into lines
            var lines = data.Split(new[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);

            // Loop all lines
            foreach (var line in lines)
            {
                // Create a new List<float> representing all the commaseparated numbers in this line
                var lineArray = new List <float> ();

                // Slipt line by , and loop through all the numeric valus
                foreach (var s in line.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries))
                {
                    // Add converted numeric value to our lineArray 
                    lineArray.Add(Convert.ToInt64(s));
                    //lineArray.Add(Convert.ToSingle(s));
                }
                // Add lineArray to main array
                arrays.Add(lineArray.ToArray());


                // Loop repeats until there are noe more lines

                int i = 0, result = 0;
                while (i < lineArray.Count)
                {
                    result += Convert.ToInt32(lineArray[i++]);
                }

                Console.WriteLine(result);
            }

            //var numberOfRows = lines.Count();
            //var numberOfValues = arrays.Sum(s => s.Length);

            //Console.WriteLine(numberOfRows);
            //Console.WriteLine(numberOfValues);
            Console.ReadLine();

        }
    }
    
}

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