C prepared by windows calculator instance code

  • 2020-05-17 06:14:05
  • OfStack


using System;
using System.Drawing;
using System.Windows;
using System.Windows.Forms;
using System.Collections;
using System.ComponentModel;
using System.Data;
namespace comput
{
    /// <summary>
    /// This is a 1 A simple implementation of a calculator.
    /// </summary>
    public class Form1 : System.Windows.Forms.Form
    {
        #region Control statements
        private System.Windows.Forms.TextBox txtShow;
        private System.Windows.Forms.GroupBox groupBox1;
        private System.Windows.Forms.Button btn_rev;
        private System.Windows.Forms.Button btn_dot;
        private System.Windows.Forms.Button btn_add;
        private System.Windows.Forms.Button btn_equ;
        private System.Windows.Forms.Button btn_sign;
        private System.Windows.Forms.Button btn_sub;
        private System.Windows.Forms.Button btn_mul;
        private System.Windows.Forms.Button btn_0;
        private System.Windows.Forms.Button btn_3;
        private System.Windows.Forms.Button btn_2;
        private System.Windows.Forms.Button btn_1;
        private System.Windows.Forms.Button btn_6;
        private System.Windows.Forms.Button btn_5;
        private System.Windows.Forms.Button btn_4;
        private System.Windows.Forms.Button btn_sqrt;
        private System.Windows.Forms.Button btn_div;
        private System.Windows.Forms.Button btn_7;
        private System.Windows.Forms.Button btn_8;
        private System.Windows.Forms.Button btn_9;
        private System.Windows.Forms.MainMenu mainMenu1;
        private System.Windows.Forms.MenuItem menuItem1;
        private System.Windows.Forms.Button btn_sqr;
        private System.Windows.Forms.MenuItem menuItem2;
        private System.Windows.Forms.MenuItem menuItem3;
        private System.Windows.Forms.MenuItem menuItem4;
        private System.Windows.Forms.MenuItem menuItem5;
        private System.Windows.Forms.MenuItem menuItem6;
        private System.Windows.Forms.Button c;
        private System.Windows.Forms.Button ce;
        private System.Windows.Forms.MenuItem menuItem8;
        private System.Windows.Forms.MenuItem menuItem9;
        private System.Windows.Forms.MenuItem menuItem10;
        /// <summary>
        /// Required designer variables.
        /// </summary>
        private System.ComponentModel.Container components = null;
        public Form1()
        {
            //
            // Windows Form designer support is required
            //
            InitializeComponent();
            //
            // TODO: in InitializeComponent Add any constructor code after the call
            //
        }
        /// <summary>
        /// Clean up all resources in use.
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null)
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }
       #endregion
        #region Method of the properties of each control Windows Form Designer generated code
        /// <summary>
        /// The designer supports the required methods - Do not use the code editor to modify
        /// The contents of this method.
        /// </summary>
        private void InitializeComponent()
        {
            System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(Form1));
            this.txtShow = new System.Windows.Forms.TextBox();
            this.groupBox1 = new System.Windows.Forms.GroupBox();
            this.c = new System.Windows.Forms.Button();
            this.ce = new System.Windows.Forms.Button();
            this.btn_rev = new System.Windows.Forms.Button();
            this.btn_dot = new System.Windows.Forms.Button();
            this.btn_add = new System.Windows.Forms.Button();
            this.btn_equ = new System.Windows.Forms.Button();
            this.btn_sign = new System.Windows.Forms.Button();
            this.btn_sub = new System.Windows.Forms.Button();
            this.btn_mul = new System.Windows.Forms.Button();
            this.btn_0 = new System.Windows.Forms.Button();
            this.btn_3 = new System.Windows.Forms.Button();
            this.btn_2 = new System.Windows.Forms.Button();
            this.btn_1 = new System.Windows.Forms.Button();
            this.btn_6 = new System.Windows.Forms.Button();
            this.btn_5 = new System.Windows.Forms.Button();
            this.btn_4 = new System.Windows.Forms.Button();
            this.btn_sqrt = new System.Windows.Forms.Button();
            this.btn_div = new System.Windows.Forms.Button();
            this.btn_7 = new System.Windows.Forms.Button();
            this.btn_8 = new System.Windows.Forms.Button();
            this.btn_9 = new System.Windows.Forms.Button();
            this.btn_sqr = new System.Windows.Forms.Button();
            this.mainMenu1 = new System.Windows.Forms.MainMenu();
            this.menuItem1 = new System.Windows.Forms.MenuItem();
            this.menuItem2 = new System.Windows.Forms.MenuItem();
            this.menuItem3 = new System.Windows.Forms.MenuItem();
            this.menuItem4 = new System.Windows.Forms.MenuItem();
            this.menuItem5 = new System.Windows.Forms.MenuItem();
            this.menuItem6 = new System.Windows.Forms.MenuItem();
            this.menuItem8 = new System.Windows.Forms.MenuItem();
            this.menuItem9 = new System.Windows.Forms.MenuItem();
            this.menuItem10 = new System.Windows.Forms.MenuItem();
            this.groupBox1.SuspendLayout();
            this.SuspendLayout();
            //
            // txtShow
            //
            this.txtShow.BackColor = System.Drawing.Color.FromArgb(((System.Byte)(192)), ((System.Byte)(192)), ((System.Byte)(255)));
            this.txtShow.Font = new System.Drawing.Font(" Song typeface ", 10.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.txtShow.ForeColor = System.Drawing.Color.Purple;
            this.txtShow.Location = new System.Drawing.Point(25, 8);
            this.txtShow.Name = "txtShow";
            this.txtShow.Size = new System.Drawing.Size(228, 23);
            this.txtShow.TabIndex = 1;
            this.txtShow.Text = "0.";
            this.txtShow.TextAlign = System.Windows.Forms.HorizontalAlignment.Right;
            //
            // groupBox1
            //
            this.groupBox1.Controls.Add(this.c);
            this.groupBox1.Controls.Add(this.ce);
            this.groupBox1.Controls.Add(this.btn_rev);
            this.groupBox1.Controls.Add(this.btn_dot);
            this.groupBox1.Controls.Add(this.btn_add);
            this.groupBox1.Controls.Add(this.btn_equ);
            this.groupBox1.Controls.Add(this.btn_sign);
            this.groupBox1.Controls.Add(this.btn_sub);
            this.groupBox1.Controls.Add(this.btn_mul);
            this.groupBox1.Controls.Add(this.btn_0);
            this.groupBox1.Controls.Add(this.btn_3);
            this.groupBox1.Controls.Add(this.btn_2);
            this.groupBox1.Controls.Add(this.btn_1);
            this.groupBox1.Controls.Add(this.btn_6);
            this.groupBox1.Controls.Add(this.btn_5);
            this.groupBox1.Controls.Add(this.btn_4);
            this.groupBox1.Controls.Add(this.btn_sqrt);
            this.groupBox1.Controls.Add(this.btn_div);
            this.groupBox1.Controls.Add(this.btn_7);
            this.groupBox1.Controls.Add(this.btn_8);
            this.groupBox1.Controls.Add(this.btn_9);
            this.groupBox1.Controls.Add(this.btn_sqr);
            this.groupBox1.Location = new System.Drawing.Point(24, 40);
            this.groupBox1.Name = "groupBox1";
            this.groupBox1.Size = new System.Drawing.Size(232, 184);
            this.groupBox1.TabIndex = 21;
            this.groupBox1.TabStop = false;
            this.groupBox1.Text = " Computer area ";
            //
            // c
            //
            this.c.Font = new System.Drawing.Font(" Song typeface ", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.c.ForeColor = System.Drawing.Color.Red;
            this.c.Location = new System.Drawing.Point(178, 48);
            this.c.Name = "c";
            this.c.Size = new System.Drawing.Size(36, 61);
            this.c.TabIndex = 41;
            this.c.Text = "C";
            this.c.Click += new System.EventHandler(this.btn_Oper);
            //
            // ce
            //
            this.ce.Font = new System.Drawing.Font(" Song typeface ", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.ce.ForeColor = System.Drawing.Color.Red;
            this.ce.Location = new System.Drawing.Point(138, 16);
            this.ce.Name = "ce";
            this.ce.Size = new System.Drawing.Size(76, 29);
            this.ce.TabIndex = 40;
            this.ce.Text = "CE";
            this.ce.Click += new System.EventHandler(this.btn_Oper);
            //
            // btn_rev
            //
            this.btn_rev.Font = new System.Drawing.Font(" Song typeface ", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.btn_rev.ForeColor = System.Drawing.Color.Blue;
            this.btn_rev.Location = new System.Drawing.Point(178, 112);
            this.btn_rev.Name = "btn_rev";
            this.btn_rev.Size = new System.Drawing.Size(36, 29);
            this.btn_rev.TabIndex = 39;
            this.btn_rev.Text = "1/x";
            this.btn_rev.Click += new System.EventHandler(this.btn_Oper);
            //
            // btn_dot
            //
            this.btn_dot.Font = new System.Drawing.Font(" Song typeface ", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.btn_dot.Location = new System.Drawing.Point(98, 144);
            this.btn_dot.Name = "btn_dot";
            this.btn_dot.Size = new System.Drawing.Size(36, 29);
            this.btn_dot.TabIndex = 38;
            this.btn_dot.Tag = "0";
            this.btn_dot.Text = ".";
            this.btn_dot.Click += new System.EventHandler(this.btn_Oper);
            //
            // btn_add
            //
            this.btn_add.Font = new System.Drawing.Font(" Song typeface ", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.btn_add.ForeColor = System.Drawing.Color.Red;
            this.btn_add.Location = new System.Drawing.Point(138, 144);
            this.btn_add.Name = "btn_add";
            this.btn_add.Size = new System.Drawing.Size(36, 29);
            this.btn_add.TabIndex = 37;
            this.btn_add.Text = "+";
            this.btn_add.Click += new System.EventHandler(this.btn_Oper);
            //
            // btn_equ
            //
            this.btn_equ.Font = new System.Drawing.Font(" Song typeface ", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.btn_equ.ForeColor = System.Drawing.Color.Red;
            this.btn_equ.Location = new System.Drawing.Point(178, 144);
            this.btn_equ.Name = "btn_equ";
            this.btn_equ.Size = new System.Drawing.Size(36, 29);
            this.btn_equ.TabIndex = 36;
            this.btn_equ.Text = "=";
            this.btn_equ.Click += new System.EventHandler(this.btn_equ_Click);
            //
            // btn_sign
            //
            this.btn_sign.Font = new System.Drawing.Font(" Song typeface ", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.btn_sign.ForeColor = System.Drawing.Color.Blue;
            this.btn_sign.Location = new System.Drawing.Point(58, 144);
            this.btn_sign.Name = "btn_sign";
            this.btn_sign.Size = new System.Drawing.Size(36, 29);
            this.btn_sign.TabIndex = 35;
            this.btn_sign.Text = "+/-";
            this.btn_sign.Click += new System.EventHandler(this.btn_Oper);
            //
            // btn_sub
            //
            this.btn_sub.Font = new System.Drawing.Font(" Song typeface ", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.btn_sub.ForeColor = System.Drawing.Color.Red;
            this.btn_sub.Location = new System.Drawing.Point(138, 112);
            this.btn_sub.Name = "btn_sub";
            this.btn_sub.Size = new System.Drawing.Size(36, 29);
            this.btn_sub.TabIndex = 34;
            this.btn_sub.Text = "-";
            this.btn_sub.Click += new System.EventHandler(this.btn_Oper);
            //
            // btn_mul
            //
            this.btn_mul.Font = new System.Drawing.Font(" Song typeface ", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.btn_mul.ForeColor = System.Drawing.Color.Red;
            this.btn_mul.Location = new System.Drawing.Point(138, 80);
            this.btn_mul.Name = "btn_mul";
            this.btn_mul.Size = new System.Drawing.Size(36, 29);
            this.btn_mul.TabIndex = 33;
            this.btn_mul.Text = "*";
            this.btn_mul.Click += new System.EventHandler(this.btn_Oper);
            //
            // btn_0
            //
            this.btn_0.Font = new System.Drawing.Font(" Song typeface ", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.btn_0.ForeColor = System.Drawing.Color.Blue;
            this.btn_0.Location = new System.Drawing.Point(18, 144);
            this.btn_0.Name = "btn_0";
            this.btn_0.Size = new System.Drawing.Size(36, 29);
            this.btn_0.TabIndex = 32;
            this.btn_0.Tag = "0";
            this.btn_0.Text = "0";
            this.btn_0.Click += new System.EventHandler(this.btn_0_Click);
            //
            // btn_3
            //
            this.btn_3.Font = new System.Drawing.Font(" Song typeface ", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.btn_3.ForeColor = System.Drawing.Color.Blue;
            this.btn_3.Location = new System.Drawing.Point(98, 112);
            this.btn_3.Name = "btn_3";
            this.btn_3.Size = new System.Drawing.Size(36, 29);
            this.btn_3.TabIndex = 31;
            this.btn_3.Tag = "3";
            this.btn_3.Text = "3";
            this.btn_3.Click += new System.EventHandler(this.btn_0_Click);
            //
            // btn_2
            //
            this.btn_2.Font = new System.Drawing.Font(" Song typeface ", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.btn_2.ForeColor = System.Drawing.Color.Blue;
            this.btn_2.Location = new System.Drawing.Point(58, 112);
            this.btn_2.Name = "btn_2";
            this.btn_2.Size = new System.Drawing.Size(36, 29);
            this.btn_2.TabIndex = 30;
            this.btn_2.Tag = "2";
            this.btn_2.Text = "2";
            this.btn_2.Click += new System.EventHandler(this.btn_0_Click);
            //
            // btn_1
            //
            this.btn_1.Font = new System.Drawing.Font(" Song typeface ", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.btn_1.ForeColor = System.Drawing.Color.Blue;
            this.btn_1.Location = new System.Drawing.Point(18, 112);
            this.btn_1.Name = "btn_1";
            this.btn_1.Size = new System.Drawing.Size(36, 29);
            this.btn_1.TabIndex = 29;
            this.btn_1.Tag = "1";
            this.btn_1.Text = "1";
            this.btn_1.Click += new System.EventHandler(this.btn_0_Click);
            //
            // btn_6
            //
            this.btn_6.Font = new System.Drawing.Font(" Song typeface ", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.btn_6.ForeColor = System.Drawing.Color.Blue;
            this.btn_6.Location = new System.Drawing.Point(98, 80);
            this.btn_6.Name = "btn_6";
            this.btn_6.Size = new System.Drawing.Size(36, 29);
            this.btn_6.TabIndex = 28;
            this.btn_6.Tag = "6";
            this.btn_6.Text = "6";
            this.btn_6.Click += new System.EventHandler(this.btn_0_Click);
            //
            // btn_5
            //
            this.btn_5.Font = new System.Drawing.Font(" Song typeface ", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.btn_5.ForeColor = System.Drawing.Color.Blue;
            this.btn_5.Location = new System.Drawing.Point(58, 80);
            this.btn_5.Name = "btn_5";
            this.btn_5.Size = new System.Drawing.Size(36, 29);
            this.btn_5.TabIndex = 27;
            this.btn_5.Tag = "5";
            this.btn_5.Text = "5";
            this.btn_5.Click += new System.EventHandler(this.btn_0_Click);
            //
            // btn_4
            //
            this.btn_4.Font = new System.Drawing.Font(" Song typeface ", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.btn_4.ForeColor = System.Drawing.Color.Blue;
            this.btn_4.Location = new System.Drawing.Point(18, 80);
            this.btn_4.Name = "btn_4";
            this.btn_4.Size = new System.Drawing.Size(36, 29);
            this.btn_4.TabIndex = 26;
            this.btn_4.Tag = "4";
            this.btn_4.Text = "4";
            this.btn_4.Click += new System.EventHandler(this.btn_0_Click);
            //
            // btn_sqrt
            //
            this.btn_sqrt.Font = new System.Drawing.Font(" Song typeface ", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.btn_sqrt.ForeColor = System.Drawing.Color.Blue;
            this.btn_sqrt.Location = new System.Drawing.Point(18, 16);
            this.btn_sqrt.Name = "btn_sqrt";
            this.btn_sqrt.Size = new System.Drawing.Size(76, 29);
            this.btn_sqrt.TabIndex = 25;
            this.btn_sqrt.Text = "sqrt";
            this.btn_sqrt.Click += new System.EventHandler(this.btn_Oper);
            //
            // btn_div
            //
            this.btn_div.Font = new System.Drawing.Font(" Song typeface ", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.btn_div.ForeColor = System.Drawing.Color.Red;
            this.btn_div.Location = new System.Drawing.Point(138, 48);
            this.btn_div.Name = "btn_div";
            this.btn_div.Size = new System.Drawing.Size(36, 29);
            this.btn_div.TabIndex = 24;
            this.btn_div.Text = "/";
            this.btn_div.Click += new System.EventHandler(this.btn_Oper);
            //
            // btn_7
            //
            this.btn_7.Font = new System.Drawing.Font(" Song typeface ", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.btn_7.ForeColor = System.Drawing.Color.Blue;
            this.btn_7.Location = new System.Drawing.Point(18, 48);
            this.btn_7.Name = "btn_7";
            this.btn_7.Size = new System.Drawing.Size(36, 29);
            this.btn_7.TabIndex = 23;
            this.btn_7.Tag = "7";
            this.btn_7.Text = "7";
            this.btn_7.Click += new System.EventHandler(this.btn_0_Click);
            //
            // btn_8
            //
            this.btn_8.Font = new System.Drawing.Font(" Song typeface ", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.btn_8.ForeColor = System.Drawing.Color.Blue;
            this.btn_8.Location = new System.Drawing.Point(58, 48);
            this.btn_8.Name = "btn_8";
            this.btn_8.Size = new System.Drawing.Size(36, 29);
            this.btn_8.TabIndex = 22;
            this.btn_8.Tag = "8";
            this.btn_8.Text = "8";
            this.btn_8.Click += new System.EventHandler(this.btn_0_Click);
            //
            // btn_9
            //
            this.btn_9.Font = new System.Drawing.Font(" Song typeface ", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.btn_9.ForeColor = System.Drawing.Color.Blue;
            this.btn_9.Location = new System.Drawing.Point(98, 48);
            this.btn_9.Name = "btn_9";
            this.btn_9.Size = new System.Drawing.Size(36, 29);
            this.btn_9.TabIndex = 21;
            this.btn_9.Tag = "9";
            this.btn_9.Text = "9";
            this.btn_9.Click += new System.EventHandler(this.btn_0_Click);
            //
            // btn_sqr
            //
            this.btn_sqr.Font = new System.Drawing.Font(" Song typeface ", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
            this.btn_sqr.ForeColor = System.Drawing.Color.Blue;
            this.btn_sqr.Location = new System.Drawing.Point(98, 16);
            this.btn_sqr.Name = "btn_sqr";
            this.btn_sqr.Size = new System.Drawing.Size(36, 29);
            this.btn_sqr.TabIndex = 19;
            this.btn_sqr.Text = "sqr";
            this.btn_sqr.Click += new System.EventHandler(this.btn_Oper);
            //
            // mainMenu1
            //
            this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
                                                                                      this.menuItem8,
                                                                                      this.menuItem1,
                                                                                      this.menuItem4});
            //
            // menuItem1
            //
            this.menuItem1.Index = 1;
            this.menuItem1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
                                                                                      this.menuItem2,
                                                                                      this.menuItem3});
            this.menuItem1.Text = " The editor (&E)";
            //
            // menuItem2
            //
            this.menuItem2.Index = 0;
            this.menuItem2.Text = " copy (&C)";
            this.menuItem2.Click += new System.EventHandler(this.menuItem2_Click);
            //
            // menuItem3
            //
            this.menuItem3.Index = 1;
            this.menuItem3.Text = " paste (&P)";
            this.menuItem3.Click += new System.EventHandler(this.menuItem3_Click);
            //
            // menuItem4
            //
            this.menuItem4.Index = 2;
            this.menuItem4.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
                                                                                      this.menuItem5,
                                                                                      this.menuItem6});
            this.menuItem4.Text = " help (&H)";
            //
            // menuItem5
            //
            this.menuItem5.Index = 0;
            this.menuItem5.Text = " The help topic (&H)";
            this.menuItem5.Click += new System.EventHandler(this.menuItem5_Click);
            //
            // menuItem6
            //
            this.menuItem6.Index = 1;
            this.menuItem6.Text = " about (&A)";
            this.menuItem6.Click += new System.EventHandler(this.menuItem6_Click);
            //
            // menuItem8
            //
            this.menuItem8.Index = 0;
            this.menuItem8.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
                                                                                      this.menuItem9,
                                                                                      this.menuItem10});
            this.menuItem8.Text = " file (&F)";
            //
            // menuItem9
            //
            this.menuItem9.Index = 0;
            this.menuItem9.Text = " Open the windows The calculator (&O)";
            this.menuItem9.Click += new System.EventHandler(this.menuItem9_Click);
            //
            // menuItem10
            //
            this.menuItem10.Index = 1;
            this.menuItem10.Text = " exit (&Q)";
            this.menuItem10.Click += new System.EventHandler(this.menuItem10_Click);
            //
            // Form1
            //
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.ClientSize = new System.Drawing.Size(278, 239);
            this.Controls.Add(this.groupBox1);
            this.Controls.Add(this.txtShow);
            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.Fixed3D;
            this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
            this.MaximizeBox = false;
            this.Menu = this.mainMenu1;
            this.Name = "Form1";
            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
            this.Text = " The calculator ";
            this.groupBox1.ResumeLayout(false);
            this.ResumeLayout(false);
        }
        #endregion
        #region Declaration of variables and constants
        public const int NULL = 0;      // Define opcodes
        public const int ADD = 1;     // Said to add
        public const int SUB = 2;     // Reduction of
        public const int MUL = 3;     // take
        public const int DIV = 4;    // In addition to
        public const int SQR = 5;    // square
        public const int SQRT = 6;   // Square root
        public const int NODOT  = 0;     // Defines whether the decimal point is clicked ,0 For no point
        public const int HASDOT = 1;
        private double res = 0;         // Number of recorded results
        private double tmp = 0;         // The operand currently entered
        private int opt = NULL;         // Record opcode
        private int dot = NODOT;    // Record whether the decimal point was clicked ,0 For there is no point
        private int num = 0;        // Record the number of input operands
        private int dotnum = 0;        // Record the number of decimal points        
        string strOper;            // Get operator
        #endregion
        /// <summary>
        /// The application's main entry point.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.Run(new Form1());
        }
        /// <summary>
        #region Gets the operand event
        // Gets the operand event
        private void btn_0_Click(object sender, System.EventArgs e)
        {
            System.Windows.Forms.Button btnTmp;
            double i;
            btnTmp = sender as System.Windows.Forms.Button;           
            if (btnTmp != null)
            {
                if (dot == NODOT)
                {
                    // I didn't click the decimal point
                    i = double.Parse(btnTmp.Tag.ToString()); // Takes the number of user-defined control associations , Translates into double type
                    tmp = tmp * 10 + i;
                    txtShow.Text = tmp.ToString();   // Put it on the text screen
                }
                else   // I hit the decimal point
                {                   
                    dotnum++;    // Record the number of decimal points
                                                       // Generates a new value for the decimal part
                    i = double.Parse(btnTmp.Tag.ToString()) / System.Math.Pow(10,dotnum);
                    tmp = tmp + i;  // Adds the value after the decimal point to the current operation number
                    txtShow.Text = tmp.ToString();
                }
            }
        }
        #endregion
        #region Equals the event and equals the method
        // Is equal to the event
        private void btn_equ_Click(object sender, System.EventArgs e)
        {
     &n

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