10/29 作業

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

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        System.Windows.Forms.Button[] Buttons;
        System.Windows.Forms.TextBox[] textboxs;
        int[,] a = new int[4, 4];
        int bno;
        Form2 newform;
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            Buttons = new System.Windows.Forms.Button[9];
            textboxs = new System.Windows.Forms.TextBox[9];
            for (int i = 0; i < 9; ++i)
            {
                Buttons[i] = new Button();

                Buttons[i].Click += new System.EventHandler(Buttons_Click);
                this.Controls.Add(Buttons[i]);
                if (i <= 2)
                    Buttons[i].Location = new System.Drawing.Point(10 + i * 80, 10 + 100);
                else if (i > 2 && i <= 5)
                    Buttons[i].Location = new System.Drawing.Point(10 + (i - 3) * 80, 40 + 100);
                else if (i > 5 && i <= 9)
                    Buttons[i].Location = new System.Drawing.Point(10 + (i - 6) * 80, 70 + 100);
            }

           

            for (int j = 0; j < 9; j++)
            {
                textboxs[j] = new TextBox();
                this.Controls.Add(textboxs[j]);
                if (j <= 2)
                    textboxs[j].Location = new System.Drawing.Point(10 + j * 110, 10);
                else if (j > 2 && j <= 5)
                    textboxs[j].Location = new System.Drawing.Point(10 + (j - 3) * 110, 40);
                else if (j > 5 && j <= 9)
                    textboxs[j].Location = new System.Drawing.Point(10 + (j - 6) * 110, 70);

            }
            textboxs[0].Text = "7";
            textboxs[1].Text = "2";
            textboxs[2].Text = "4";
            textboxs[3].Text = "5";
            textboxs[4].Text = "0";
            textboxs[5].Text = "6";
            textboxs[6].Text = "8";
            textboxs[7].Text = "3";
            textboxs[8].Text = "1";


        }
        public void Buttons_Click(object sender, EventArgs e)
        {
            // System.Windows.Forms.MessageBox.Show("You have clicked button " +
            //   ((System.Windows.Forms.Button)sender).Tag.ToString());
           String tnum = sender.ToString();
            int tlen = tnum.Length;
            String no = tnum.Substring(tlen - 1);
            for (int j = 0; j < 9; j++)
            {
                if (Buttons[j].Text == no)
                    bno = j;                 
            }
            switch (bno)
            {
                case 0:
                    if (Buttons[1].Text == "0")
                    {
                        String temp;
                        temp = Buttons[1].Text;
                        Buttons[1].Text = Buttons[0].Text;
                        Buttons[0].Text = temp;
                    }
                    if (Buttons[3].Text == "0")
                    {
                        String temp;
                        temp = Buttons[3].Text;
                        Buttons[3].Text = Buttons[0].Text;
                        Buttons[0].Text = temp;
                    }
                   
                    break;
                case 1:
                    if (Buttons[0].Text == "0")
                    {
                        String temp;
                        temp = Buttons[0].Text;
                        Buttons[0].Text = Buttons[1].Text;
                        Buttons[1].Text = temp;
                    }
                    if (Buttons[2].Text == "0")
                    {
                        String temp;
                        temp = Buttons[2].Text;
                        Buttons[2].Text = Buttons[1].Text;
                        Buttons[1].Text = temp;
                    }
                    if (Buttons[4].Text == "0")
                    {
                        String temp;
                        temp = Buttons[4].Text;
                        Buttons[4].Text = Buttons[1].Text;
                        Buttons[1].Text = temp;
                    }
                    break;
                case 2:
                    if (Buttons[1].Text == "0")
                    {
                        String temp;
                        temp = Buttons[1].Text;
                        Buttons[1].Text = Buttons[2].Text;
                        Buttons[2].Text = temp;
                    }
                    if (Buttons[5].Text == "0")
                    {
                        String temp;
                        temp = Buttons[5].Text;
                        Buttons[5].Text = Buttons[2].Text;
                        Buttons[2].Text = temp;
                    }
                    break;
                case 3:
                    if (Buttons[4].Text == "0")
                    {
                        String temp;
                        temp = Buttons[4].Text;
                        Buttons[4].Text = Buttons[3].Text;
                        Buttons[3].Text = temp;
                    }
                    if (Buttons[0].Text == "0")
                    {
                        String temp;
                        temp = Buttons[0].Text;
                        Buttons[0].Text = Buttons[3].Text;
                        Buttons[3].Text = temp;
                    }
                    if (Buttons[6].Text == "0")
                    {
                        String temp;
                        temp = Buttons[6].Text;
                        Buttons[6].Text = Buttons[3].Text;
                        Buttons[3].Text = temp;
                    }
                    break;
                case 4:
                    if (Buttons[1].Text == "0")
                    {
                        String temp;
                        temp = Buttons[1].Text;
                        Buttons[1].Text = Buttons[4].Text;
                        Buttons[4].Text = temp;
                    }
                    if (Buttons[3].Text == "0")
                    {
                        String temp;
                        temp = Buttons[3].Text;
                        Buttons[3].Text = Buttons[4].Text;
                        Buttons[4].Text = temp;
                    }
                    if (Buttons[5].Text == "0")
                    {
                        String temp;
                        temp = Buttons[5].Text;
                        Buttons[5].Text = Buttons[4].Text;
                        Buttons[4].Text = temp;
                    }
                    if (Buttons[7].Text == "0")
                    {
                        String temp;
                        temp = Buttons[7].Text;
                        Buttons[7].Text = Buttons[4].Text;
                        Buttons[4].Text = temp;
                    }
                    break;
                case 5:
                    if (Buttons[2].Text == "0")
                    {
                        String temp;
                        temp = Buttons[2].Text;
                        Buttons[2].Text = Buttons[5].Text;
                        Buttons[5].Text = temp;
                    }
                    if (Buttons[4].Text == "0")
                    {
                        String temp;
                        temp = Buttons[4].Text;
                        Buttons[4].Text = Buttons[5].Text;
                        Buttons[5].Text = temp;
                    }
                    if (Buttons[8].Text == "0")
                    {
                        String temp;
                        temp = Buttons[8].Text;
                        Buttons[8].Text = Buttons[5].Text;
                        Buttons[5].Text = temp;
                    }
                    break;
                case 6:
                    if (Buttons[3].Text == "0")
                    {
                        String temp;
                        temp = Buttons[3].Text;
                        Buttons[3].Text = Buttons[6].Text;
                        Buttons[6].Text = temp;
                    }
                    if (Buttons[7].Text == "0")
                    {
                        String temp;
                        temp = Buttons[7].Text;
                        Buttons[7].Text = Buttons[6].Text;
                        Buttons[6].Text = temp;
                    }
                    break;
                case 7:
                    if (Buttons[4].Text == "0")
                    {
                        String temp;
                        temp = Buttons[4].Text;
                        Buttons[4].Text = Buttons[7].Text;
                        Buttons[7].Text = temp;
                    }
                    if (Buttons[6].Text == "0")
                    {
                        String temp;
                        temp = Buttons[6].Text;
                        Buttons[6].Text = Buttons[7].Text;
                        Buttons[7].Text = temp;
                    }
                    if (Buttons[8].Text == "0")
                    {
                        String temp;
                        temp = Buttons[8].Text;
                        Buttons[8].Text = Buttons[7].Text;
                        Buttons[7].Text = temp;
                    }
                    break;
                case 8:
                    if (Buttons[5].Text == "0")
                    {
                        String temp;
                        temp = Buttons[5].Text;
                        Buttons[5].Text = Buttons[8].Text;
                        Buttons[8].Text = temp;
                    }
                    if (Buttons[7].Text == "0")
                    {
                        String temp;
                        temp = Buttons[7].Text;
                        Buttons[7].Text = Buttons[8].Text;
                        Buttons[8].Text = temp;
                    }
                    break;
            }

        }

        private void button1_Click(object sender, EventArgs e)
        {   //輸入 input
            for (int i = 0; i < 9; i++)
            {
                if(i <= 2)
                a[1, i+1] = Convert.ToInt16(textboxs[i].Text);
                else if(i > 2 && i <= 5)
                a[2, (i-3)+1] = Convert.ToInt16(textboxs[i].Text);
                else if (i > 5 && i <= 9)
                a[3, (i-6)+1] = Convert.ToInt16(textboxs[i].Text);
             
            }
            //輸出 output
            for (int j = 0; j < 9; j++ )
                if (j <= 2)
            Buttons[j].Text = Convert.ToString(a[1, j+1]);
                else if (j > 2 && j <= 5)
            Buttons[j].Text = Convert.ToString(a[2, (j-3)+1]);
                else if (j > 5 && j <= 9)
            Buttons[j].Text = Convert.ToString(a[3, (j-6)+1]);
    



        }

        private void button2_Click(object sender, EventArgs e)
        {
            newform = new Form2();
            newform.Show();
        }
    }
}

順序 5-7-2-5-6-1-3--8-7-6-1-3-8-7-6-1-3-4-5--2-1-3-4-5-2-1
共26步

10/15 上課作業

namespace WindowsFormsApplication1
{
    public partial class Form2 : Form
    {
        System.Windows.Forms.TextBox[] textboxs;
        int[,] a = new int[5, 5];
        int[,] b = new int[5, 5];
        int[,] c = new int[5, 5];
        public Form2()
        {
            InitializeComponent();
        }

        private void Form2_Load(object sender, EventArgs e)
        {
            textboxs = new System.Windows.Forms.TextBox[48];
            for (int j = 0; j < 48; j++)
            {
                textboxs[j] = new TextBox();
                this.Controls.Add(textboxs[j]);
                if (j <= 3)
                    textboxs[j].Location = new System.Drawing.Point(10 + j * 110, 10);
                else if (j > 3 && j <= 7)
                    textboxs[j].Location = new System.Drawing.Point(10 + (j - 4) * 110, 40);
                else if (j > 7 && j <= 11)
                    textboxs[j].Location = new System.Drawing.Point(10 + (j - 8) * 110, 70);
                else if (j > 11 && j <= 15)
                    textboxs[j].Location = new System.Drawing.Point(10 + (j - 12) * 110, 100);

                else if (j > 15 && j <= 19)
                    textboxs[j].Location = new System.Drawing.Point(10 + (j - 16) * 110, 140);
                else if (j > 19 && j <= 23)
                    textboxs[j].Location = new System.Drawing.Point(10 + (j - 20) * 110, 170);
                else if (j > 23 && j <= 27)
                    textboxs[j].Location = new System.Drawing.Point(10 + (j - 24) * 110, 200);
                else if (j > 27 && j <= 31)
                    textboxs[j].Location = new System.Drawing.Point(10 + (j - 28) * 110, 230);

                else if (j > 31 && j <= 35)
                    textboxs[j].Location = new System.Drawing.Point(10 + (j - 32) * 110, 270);
                else if (j > 35 && j <= 39)
                    textboxs[j].Location = new System.Drawing.Point(10 + (j - 36) * 110, 300);
                else if (j > 39 && j <= 43)
                    textboxs[j].Location = new System.Drawing.Point(10 + (j - 40) * 110, 330);
                else if (j > 43 && j <= 47)
                    textboxs[j].Location = new System.Drawing.Point(10 + (j - 44) * 110, 360);

            }
            textboxs[0].Text = "1";
            textboxs[1].Text = "0";
            textboxs[2].Text = "0";
            textboxs[3].Text = "0";
            textboxs[4].Text = "0";
            textboxs[5].Text = "1";
            textboxs[6].Text = "0";
            textboxs[7].Text = "0";
            textboxs[8].Text = "0";
            textboxs[9].Text = "0";
            textboxs[10].Text = "1";
            textboxs[11].Text = "0";
            textboxs[12].Text = "0";
            textboxs[13].Text = "0";
            textboxs[14].Text = "0";
            textboxs[15].Text = "1";

            textboxs[16].Text = "1";
            textboxs[17].Text = "0";
            textboxs[18].Text = "0";
            textboxs[19].Text = "0";
            textboxs[20].Text = "0";
            textboxs[21].Text = "1";
            textboxs[22].Text = "0";
            textboxs[23].Text = "0";
            textboxs[24].Text = "0";
            textboxs[25].Text = "0";
            textboxs[26].Text = "1";
            textboxs[27].Text = "0";
            textboxs[28].Text = "0";
            textboxs[29].Text = "0";
            textboxs[30].Text = "0";
            textboxs[31].Text = "1";



        }

        private void button1_Click(object sender, EventArgs e)
        {
            //輸入 intput
            for (int i = 0; i < 16; i++)
            {
                if (i <= 3)
                    a[1, i + 1] = Convert.ToInt16(textboxs[i].Text);
                else if (i > 3 && i <= 7)
                    a[2, (i - 4) + 1] = Convert.ToInt16(textboxs[i].Text);
                else if (i > 7 && i <= 11)
                    a[3, (i - 8) + 1] = Convert.ToInt16(textboxs[i].Text);
                else if (i > 11 && i <= 15)
                    a[4, (i - 12) + 1] = Convert.ToInt16(textboxs[i].Text);
            }
            for (int i = 0; i < 16; i++)
            {
                if (i <= 3)
                    b[1, i + 1] = Convert.ToInt16(textboxs[(i+16)].Text);
                else if (i > 3 && i <= 7)
                    b[2, (i - 4) + 1] = Convert.ToInt16(textboxs[(i+16)].Text);
                else if (i > 7 && i <= 11)
                    b[3, (i - 8) + 1] = Convert.ToInt16(textboxs[(i+16)].Text);
                else if (i > 11 && i <= 15)
                    b[4, (i - 12) + 1] = Convert.ToInt16(textboxs[(i+16)].Text);
            }
            c[1, 1] = a[1, 1] * b[1, 1] + a[1, 2] * b[2, 1] + a[1, 3] * b[3, 1] + a[1, 4] * b[4, 1];
            c[1, 2] = a[1, 1] * b[1, 2] + a[1, 2] * b[2, 2] + a[1, 3] * b[3, 2] + a[1, 4] * b[4, 2];
            c[1, 3] = a[1, 1] * b[1, 3] + a[1, 2] * b[2, 3] + a[1, 3] * b[3, 3] + a[1, 4] * b[4, 3];
            c[1, 4] = a[1, 1] * b[1, 4] + a[1, 2] * b[2, 4] + a[1, 3] * b[3, 4] + a[1, 4] * b[4, 4];
            c[2, 1] = a[2, 1] * b[1, 1] + a[2, 2] * b[2, 1] + a[2, 3] * b[3, 1] + a[2, 4] * b[4, 1];
            c[2, 2] = a[2, 1] * b[1, 2] + a[2, 2] * b[2, 2] + a[2, 3] * b[3, 2] + a[2, 4] * b[4, 2];
            c[2, 3] = a[2, 1] * b[1, 3] + a[2, 2] * b[2, 3] + a[2, 3] * b[3, 3] + a[2, 4] * b[4, 3];
            c[2, 4] = a[2, 1] * b[1, 4] + a[2, 2] * b[2, 4] + a[2, 3] * b[3, 4] + a[2, 4] * b[4, 4];
            c[3, 1] = a[3, 1] * b[1, 1] + a[3, 2] * b[2, 1] + a[3, 3] * b[3, 1] + a[3, 4] * b[4, 1];
            c[3, 2] = a[3, 1] * b[1, 2] + a[3, 2] * b[2, 2] + a[3, 3] * b[3, 2] + a[3, 4] * b[4, 2];
            c[3, 3] = a[3, 1] * b[1, 3] + a[3, 2] * b[2, 3] + a[3, 3] * b[3, 3] + a[3, 4] * b[4, 3];
            c[3, 4] = a[3, 1] * b[1, 4] + a[3, 2] * b[2, 4] + a[3, 3] * b[3, 4] + a[3, 4] * b[4, 4];
            c[4, 1] = a[4, 1] * b[1, 1] + a[4, 2] * b[2, 1] + a[4, 3] * b[3, 1] + a[4, 4] * b[4, 1];
            c[4, 2] = a[4, 1] * b[1, 2] + a[4, 2] * b[2, 2] + a[4, 3] * b[3, 2] + a[4, 4] * b[4, 2];
            c[4, 3] = a[4, 1] * b[1, 3] + a[4, 2] * b[2, 3] + a[4, 3] * b[3, 3] + a[4, 4] * b[4, 3];
            c[4, 4] = a[4, 1] * b[1, 4] + a[4, 2] * b[2, 4] + a[4, 3] * b[3, 4] + a[4, 4] * b[4, 4];

            textboxs[32].Text = "" + c[1, 1];
            textboxs[33].Text = "" + c[1, 2];
            textboxs[34].Text = "" + c[1, 3];
            textboxs[35].Text = "" + c[1, 4];
            textboxs[36].Text = "" + c[2, 1];
            textboxs[37].Text = "" + c[2, 2];
            textboxs[38].Text = "" + c[2, 3];
            textboxs[39].Text = "" + c[2, 4];
            textboxs[40].Text = "" + c[3, 1];
            textboxs[41].Text = "" + c[3, 2];
            textboxs[42].Text = "" + c[3, 3];
            textboxs[43].Text = "" + c[3, 4];
            textboxs[44].Text = "" + c[4, 1];
            textboxs[45].Text = "" + c[4, 2];
            textboxs[46].Text = "" + c[4, 3];
            textboxs[47].Text = "" + c[4, 4];



        }
    }
}

10/22 上課課題

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        System.Windows.Forms.Button[] Buttons;
        System.Windows.Forms.TextBox[] textboxs;
        int[,] a = new int[4, 4];
     
        Form2 newform;
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            Buttons = new System.Windows.Forms.Button[9];
            textboxs = new System.Windows.Forms.TextBox[9];
            for (int i = 0; i < 9; ++i)
            {
                Buttons[i] = new Button();

                Buttons[i].Click += new System.EventHandler(Buttons_Click);
                this.Controls.Add(Buttons[i]);
                if (i <= 2)
                    Buttons[i].Location = new System.Drawing.Point(10 + i * 80, 10 + 100);
                else if (i > 2 && i <= 5)
                    Buttons[i].Location = new System.Drawing.Point(10 + (i - 3) * 80, 40 + 100);
                else if (i > 5 && i <= 9)
                    Buttons[i].Location = new System.Drawing.Point(10 + (i - 6) * 80, 70 + 100);
            }

          

            for (int j = 0; j < 9; j++)
            {
                textboxs[j] = new TextBox();
                this.Controls.Add(textboxs[j]);
                if (j <= 2)
                    textboxs[j].Location = new System.Drawing.Point(10 + j * 110, 10);
                else if (j > 2 && j <= 5)
                    textboxs[j].Location = new System.Drawing.Point(10 + (j - 3) * 110, 40);
                else if (j > 5 && j <= 9)
                    textboxs[j].Location = new System.Drawing.Point(10 + (j - 6) * 110, 70);

            }
            textboxs[0].Text = "7";
            textboxs[1].Text = "2";
            textboxs[2].Text = "4";
            textboxs[3].Text = "5";
            textboxs[4].Text = "0";
            textboxs[5].Text = "6";
            textboxs[6].Text = "8";
            textboxs[7].Text = "3";
            textboxs[8].Text = "1";


        }
        public void Buttons_Click(object sender, EventArgs e)
        {
            // System.Windows.Forms.MessageBox.Show("You have clicked button " +
            //   ((System.Windows.Forms.Button)sender).Tag.ToString());
            MessageBox.Show("" + sender.ToString());

        }

        private void button1_Click(object sender, EventArgs e)
        {   //輸入 input
            for (int i = 0; i < 9; i++)
            {
                if(i <= 2)
                a[1, i+1] = Convert.ToInt16(textboxs[i].Text);
                else if(i > 2 && i <= 5)
                a[2, (i-3)+1] = Convert.ToInt16(textboxs[i].Text);
                else if (i > 5 && i <= 9)
                a[3, (i-6)+1] = Convert.ToInt16(textboxs[i].Text);
            
            }
            //輸出 output
            for (int j = 0; j < 9; j++ )
                if (j <= 2)
            Buttons[j].Text = Convert.ToString(a[1, j+1]);
                else if (j > 2 && j <= 5)
            Buttons[j].Text = Convert.ToString(a[2, (j-3)+1]);
                else if (j > 5 && j <= 9)
            Buttons[j].Text = Convert.ToString(a[3, (j-6)+1]);
   



        }

        private void button2_Click(object sender, EventArgs e)
        {
            newform = new Form2();
            newform.Show();
        }
    }
}

3*3矩陣

            int[,] a = new int[4, 4];
            int[,] b = new int[4, 4];
            int[,] c = new int[4, 4];
           
            a[1,1]=int.Parse(textBox1.Text);
            a[1,2]=int.Parse(textBox4.Text);
            a[1,3]=int.Parse(textBox7.Text);
            a[2,1]=int.Parse(textBox2.Text);
            a[2,2]=int.Parse(textBox5.Text);
            a[2,3]=int.Parse(textBox8.Text);
            a[3,1]=int.Parse(textBox3.Text);
            a[3,2]=int.Parse(textBox6.Text);
            a[3,3]=int.Parse(textBox9.Text);

            b[1,1]=int.Parse(textBox10.Text);
            b[1,2]=int.Parse(textBox13.Text);
            b[1,3]=int.Parse(textBox16.Text);
            b[2,1]=int.Parse(textBox11.Text);
            b[2,2]=int.Parse(textBox14.Text);
            b[2,3]=int.Parse(textBox17.Text);
            b[3,1]=int.Parse(textBox12.Text);
            b[3,2]=int.Parse(textBox15.Text);
            b[3,3]=int.Parse(textBox18.Text);

            c[1,1]=a[1,1]*b[1,1]+a[1,2]*b[2,1]+a[1,3]*b[3,1];
            c[1,2]=a[1,1]*b[1,2]+a[1,2]*b[2,2]+a[1,3]*b[3,2];
            c[1,3]=a[1,1]*b[1,3]+a[1,2]*b[2,3]+a[1,3]*b[3,3];
            c[2,1]=a[2,1]*b[1,1]+a[2,2]*b[2,1]+a[2,3]*b[3,1];
            c[2,2]=a[2,1]*b[1,2]+a[2,2]*b[2,2]+a[2,3]*b[3,2];
            c[2,3]=a[2,1]*b[1,3]+a[2,2]*b[2,3]+a[2,3]*b[3,3];
            c[3,1]=a[3,1]*b[1,1]+a[3,2]*b[2,1]+a[3,3]*b[3,1];
            c[3,2]=a[3,1]*b[1,2]+a[3,2]*b[2,2]+a[3,3]*b[3,2];
            c[3,3]=a[3,1]*b[1,3]+a[3,2]*b[2,3]+a[3,3]*b[3,3];

            textBox19.Text=""+c[1,1];
            textBox22.Text=""+c[1,2];
            textBox25.Text=""+c[1,3];
            textBox20.Text=""+c[2,1];
            textBox23.Text=""+c[2,2];
            textBox26.Text=""+c[2,3];
            textBox21.Text=""+c[3,1];
            textBox24.Text=""+c[3,2];
            textBox27.Text=""+c[3,3];

99乘法表

private void button1_Click(object sender, EventArgs e)
        {
            listBox1.Items.Add("1*1=1  1*2=  2  1*3=  3  1*4=  4  1*5=  5  1*6=  6  1*7=  7  1*8=  8  1*9=  9");
            listBox1.Items.Add("2*1=2  2*2=  4  2*3=  6  2*4=  8  2*5=10  2*6=12  2*7=14  2*8=16  2*9=18");
            listBox1.Items.Add("3*1=3  3*2=  6  3*3=  9  3*4=14  3*5=15  3*6=18  3*7=21  3*8=24  3*9=27");
            listBox1.Items.Add("4*1=4  4*2=  8  4*3=12  4*4=16  4*5=20  4*6=24  4*7=28  4*8=32  4*9=36");
            listBox1.Items.Add("5*1=5  5*2=10  5*3=15  5*4=20  5*5=25  5*6=30  5*7=35  5*8=40  5*9=45");
            listBox1.Items.Add("6*1=6  6*2=12  6*3=18  6*4=24  6*5=30  6*6=36  6*7=42  6*8=48  6*9=54");
            listBox1.Items.Add("7*1=7  7*2=14  7*3=21  7*4=28  7*5=35  7*6=42  7*7=49  7*8=56  7*9=63");
            listBox1.Items.Add("8*1=8  8*2=16  8*3=24  8*4=32  8*5=40  8*6=48  8*7=56  8*8=64  8*9=72");
            listBox1.Items.Add("9*1=9  9*2=18  9*3=27  9*4=36  9*5=45  9*6=54  9*7=63  9*8=72  9*9=81");