C#数据对比

Question

my task is to read data from two text files, store that data in two separate arrays, read how many of lines match, how many of the lines don't match, and display which specific lines don't match. I know a for loop would be better but I can't remember what to do for it. I'm not sure of where to go from here and if anyone knows anything that could help, help would be greatly appreciated.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;

namespace Final_Project
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        public void grade_Click(object sender, EventArgs e)
        {
            string[] A = new string[20];
            string[] B = new string[20];
            StreamReader ifile;
            StreamReader ifile2;
            ifile = File.OpenText("answerkey.txt");
            ifile2 = File.OpenText("response.txt");
            int correct = 0;
            int incorrect = 0;
            string str = "";
            string str2 = "";
            while (ifile.EndOfStream == false & ifile2.EndOfStream == false)
            {
                str = ifile.ReadLine();
                str2 = ifile2.ReadLine();
            }

            A[correct] = str;
            B[incorrect] = str2;

            if (A[0] == B[0])

            {
                correct++;
            }
            else

            {
                incorrect++;
            }

            if (A[1] == B[1])

            {
                correct++;
            }
            else

            {
                incorrect++;
            }

            if (A[2] == B[2])

            {
                correct++;
            }
            else

            {
                incorrect++;
            }

            if (A[3] == B[3])

            {
                correct++;
            }
            else

            {
                incorrect++;
            }

            if (A[4] == B[4])

            {
                correct++;
            }
            else

            {
                incorrect++;
            }

            if (A[5] == B[5])

            {
                correct++;
            }
            else

            {
                incorrect++;
            }

            if (A[6] == B[6])

            {
                correct++;
            }
            else

            {
                incorrect++;
            }

            if (A[7] == B[7])

            {
                correct++;
            }
            else

            {
                incorrect++;
            }

            if (A[8] == B[8])

            {
                correct++;
            }
            else

            {
                incorrect++;
            }

            if (A[9] == B[9])

            {
                correct++;
            }
            else

            {
                incorrect++;
            }

            if (A[10] == B[10])

            {
                correct++;
            }
            else

            {
                incorrect++;
            }

            if (A[11] == B[11])

            {
                correct++;
            }
            else

            {
                incorrect++;
            }

            if (A[12] == B[12])

            {
                correct++;
            }
            else

            {
                incorrect++;
            }

            if (A[13] == B[13])

            {
                correct++;
            }
            else

            {
                incorrect++;
            }

            if (A[14] == B[14])

            {
                correct++;
            }
            else

            {
                incorrect++;
            }

            if (A[15] == B[15])

            {
                correct++;
            }
            else

            {
                incorrect++;
            }

            if (A[16] == B[16])

            {
                correct++;
            }
            else

            {
                incorrect++;
            }

            if (A[17] == B[17])

            {
                correct++;
            }
            else

            {
                incorrect++;
            }

            if (A[18] == B[18])

            {
                correct++;
            }
            else

            {
                incorrect++;
            }

            if (A[19] == B[19])

            {
                correct++;
            }
            else

            {
                incorrect++;
            }

            if (correct >= 14)
            {
                passfail.Text = "Passed";
            }
            else
            {
                passfail.Text = "Failed";
            }

            string[] result = File.ReadAllLines("answerkey.txt");

            correctbox.Text = correct.ToString();
            incorrectbox.Text = incorrect.ToString();
        }
    }
}

Answer 1

Here are few pointers:

1. Use File.ReadAllLines to read the files.
2. Write a for loop that iterates over the answer file lines and compare A[i] to B[i] and update correct and incorrect .
3. Think of a case where the responses file has less lines than the answers file.