如何重新排列阵列

Question

我有一个学校作业，我在此过程中有点陷入困境。

这个想法是在C＃中制作一个程序，您可以在其中可视化插入分类算法的工作方式，为此，我使用的是具有随机生成数字的一系列按钮。

它为绿色染色以进行比较，并进行红色以交换。

为什么按钮保持着色？

public partial class Form1 : Form
{
    Button[] but; 
    int[] A;
    int nr_den = 0;
    int s1 = 0;
    int s2 = 0;
    public Form1()
    {
        InitializeComponent();
    }
    private void button1_Click(object sender, EventArgs e)
    {
        nr_den = Convert.ToInt16(textBox1.Text);
        s1 = Convert.ToInt16(textBox2.Text);
        s2= Convert.ToInt16(textBox3.Text);
        A = new int[nr_den+1];
        Random r = new Random();
        for (int i = 1; i <= nr_den; i++)
        {
            A[i] = r.Next(s1, s2);
        }
        but = new Button[nr_den + 1];
        for (int i = 1; i <= nr_den; i++)
        {
            but[i] = new Button();
            but[i].Text = A[i].ToString();
            but[i].Width = 40;
            but[i].Height = 40;
            flowLayoutPanel1.Controls.Add(but[i]);
        }
    }
    public  void exchange(int[] A, int m, int n)
    {
        string s;
        int temp;
        but[m].BackColor = Color.Red;
        System.Threading.Thread.Sleep(400);
        but[n].BackColor = Color.Pink;
        System.Threading.Thread.Sleep(400);
        temp = A[m];
        s = but[m].Text;
        A[m] = A[n];
        but[m].Text = but[n].Text;
        A[n] = temp;
        but[n].Text = s;
        but[m].Refresh();
        but[n].Refresh();
    }
    public  void sort(int[] A)
    {
        int i, j;
        int N = A.Length;
        for (j = 1; j < N; j++)
        {
            for (i = j; i > 0 && A[i] < A[i - 1]; i--)
            {
                but[i-1].BackColor = Color.Green;
                System.Threading.Thread.Sleep(400);
                but[i].BackColor = Color.GreenYellow;
                System.Threading.Thread.Sleep(400);
                but[i].Refresh();
                but[i - 1].Refresh();
                exchange(A, i, i - 1);
            }
        }
    }
    private void button2_Click(object sender, EventArgs e)
    {
        for (int i=1;i<=nr_den;i++)
        richTextBox1.Text += A[i]+ " ";
        richTextBox1.Text += " n";
        sort(A);
    }
    private void button3_Click(object sender, EventArgs e)
    {
        flowLayoutPanel1.Controls.Clear();
    }
}

表格

Answer 1

完成后还原颜色

public void sort(int[] A)
    {
        int i, j;
        int N = A.Length;
        for (j = 1; j < N; j++)
        {
            for (i = j; i > 0 && A[i] < A[i - 1]; i--)
            {
                but[i - 1].BackColor = Color.Green;
                System.Threading.Thread.Sleep(400);
                but[i].BackColor = Color.GreenYellow;
                System.Threading.Thread.Sleep(400);
                but[i].Refresh();
                but[i - 1].Refresh();
                exchange(A, i, i - 1);
                but[i-1].BackColor = SystemColors.Control;
                but[i].BackColor = SystemColors.Control;
            }
        }
    }

在过程中还原颜色

public void sort(int[] A)
    {
        int i, j;
        int N = A.Length;
        for (j = 1; j < N; j++)
        {
            for (i = j; i > 0 && A[i] < A[i - 1]; i--)
            {
                but[i - 1].BackColor = Color.Green;
                System.Threading.Thread.Sleep(400);
                but[i].BackColor = Color.GreenYellow;
                System.Threading.Thread.Sleep(400);
                but[i].Refresh();
                but[i - 1].Refresh();
                exchange(A, i, i - 1);
                but[i-1].BackColor = SystemColors.Control;
                but[i].BackColor = SystemColors.Control;
                System.Threading.Thread.Sleep(400);
                but[i].Refresh();
                but[i - 1].Refresh();
            }
        }
    }