using System;
using System.Drawing;
using System.Windows;
using System.Windows.Forms;
using System.Collections;
using System.ComponentModel; using System.Data;
namespace comput
{
    /// <summary>
    /// 这是一个计算器的简单实现.
    /// </summary>
    public class Form1 : System.Windows.Forms.Form
    {
        #region 控件声明
        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>
        /// 必需的设计器变量.
        /// </summary>
        private System.ComponentModel.Container components = null;
       
        public Form1( )
        {
            //
            // Windows 窗体设计器支持所必需的
            //
            InitializeComponent( );
            //
            // TODO: 在
            InitializeComponent 调用后添加任何构造函数代码
            //
        }
       
        /// <summary>
        /// 清理所有正在使用的资源.
        /// </summary>
        protected override void Dispose(bool disposing)
        {
            if(disposing)
            {
                if ( components != null )
                {
                    components.Dispose( );
                }
            }
            base.Dispose(disposing);
        }
        #endregion
        #region 各控件的属性的方法Windows Form Designer generated code
        /// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容.
        /// </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( "宋体", 10.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Po
            int, ( ( System.Byte )( 134 ) ) );
           
            this.txtShow.ForeColor = System.Drawing.Color.Purple;
           
            this.txtShow.Location = new System.Drawing.Po
            int( 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.Po
            int( 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 = "计算机区";
            //
            // c
            //
            this.c.Font = new System.Drawing.Font( "宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Po
            int, ( ( System.Byte )( 134 ) ) );
           
            this.c.ForeColor = System.Drawing.Color.Red;
           
            this.c.Location = new System.Drawing.Po
            int( 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( "宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Po
            int, ( ( System.Byte )( 134 ) ) );
           
            this.ce.ForeColor = System.Drawing.Color.Red;
           
            this.ce.Location = new System.Drawing.Po
            int( 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( "宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Po
            int, ( ( System.Byte )( 134 ) ) );
           
            this.btn_rev.ForeColor = System.Drawing.Color.Blue;
           
            this.btn_rev.Location = new System.Drawing.Po
            int( 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( "宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Po
            int, ( ( System.Byte )( 134 ) ) );
           
            this.btn_dot.Location = new System.Drawing.Po
            int( 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( "宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Po
            int, ( ( System.Byte )( 134 ) ) );
           
            this.btn_add.ForeColor = System.Drawing.Color.Red;
           
            this.btn_add.Location = new System.Drawing.Po
            int( 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( "宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Po
            int, ( ( System.Byte )( 134 ) ) );
           
            this.btn_equ.ForeColor = System.Drawing.Color.Red;
           
            this.btn_equ.Location = new System.Drawing.Po
            int( 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( "宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Po
            int, ( ( System.Byte )( 134 ) ) );
           
            this.btn_sign.ForeColor = System.Drawing.Color.Blue;
           
            this.btn_sign.Location = new System.Drawing.Po
            int( 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( "宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Po
            int, ( ( System.Byte )( 134 ) ) );
           
            this.btn_sub.ForeColor = System.Drawing.Color.Red;
           
            this.btn_sub.Location = new System.Drawing.Po
            int( 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( "宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Po
            int, ( ( System.Byte )( 134 ) ) );
           
            this.btn_mul.ForeColor = System.Drawing.Color.Red;
           
            this.btn_mul.Location = new System.Drawing.Po
            int( 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( "宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Po
            int, ( ( System.Byte )( 134 ) ) );
           
            this.btn_0.ForeColor = System.Drawing.Color.Blue;
           
            this.btn_0.Location = new System.Drawing.Po
            int( 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( "宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Po
            int, ( ( System.Byte )( 134 ) ) );
           
            this.btn_3.ForeColor = System.Drawing.Color.Blue;
           
            this.btn_3.Location = new System.Drawing.Po
            int( 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( "宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Po
            int, ( ( System.Byte )( 134 ) ) );
           
            this.btn_2.ForeColor = System.Drawing.Color.Blue;
           
            this.btn_2.Location = new System.Drawing.Po
            int( 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( "宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Po
            int, ( ( System.Byte )( 134 ) ) );
           
            this.btn_1.ForeColor = System.Drawing.Color.Blue;
           
            this.btn_1.Location = new System.Drawing.Po
            int( 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( "宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Po
            int, ( ( System.Byte )( 134 ) ) );
           
            this.btn_6.ForeColor = System.Drawing.Color.Blue;
           
            this.btn_6.Location = new System.Drawing.Po
            int( 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( "宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Po
            int, ( ( System.Byte )( 134 ) ) );
           
            this.btn_5.ForeColor = System.Drawing.Color.Blue;
           
            this.btn_5.Location = new System.Drawing.Po
            int( 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( "宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Po
            int, ( ( System.Byte )( 134 ) ) );
           
            this.btn_4.ForeColor = System.Drawing.Color.Blue;
           
            this.btn_4.Location = new System.Drawing.Po
            int( 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( "宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Po
            int, ( ( System.Byte )( 134 ) ) );
           
            this.btn_sqrt.ForeColor = System.Drawing.Color.Blue;
           
            this.btn_sqrt.Location = new System.Drawing.Po
            int( 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( "宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Po
            int, ( ( System.Byte )( 134 ) ) );
           
            this.btn_div.ForeColor = System.Drawing.Color.Red;
           
            this.btn_div.Location = new System.Drawing.Po
            int( 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( "宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Po
            int, ( ( System.Byte )( 134 ) ) );
           
            this.btn_7.ForeColor = System.Drawing.Color.Blue;
           
            this.btn_7.Location = new System.Drawing.Po
            int( 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( "宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Po
            int, ( ( System.Byte )( 134 ) ) );
           
            this.btn_8.ForeColor = System.Drawing.Color.Blue;
           
            this.btn_8.Location = new System.Drawing.Po
            int( 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( "宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Po
            int, ( ( System.Byte )( 134 ) ) );
           
            this.btn_9.ForeColor = System.Drawing.Color.Blue;
           
            this.btn_9.Location = new System.Drawing.Po
            int( 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( "宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Po
            int, ( ( System.Byte )( 134 ) ) );
           
            this.btn_sqr.ForeColor = System.Drawing.Color.Blue;
           
            this.btn_sqr.Location = new System.Drawing.Po
            int( 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 = "编辑( &E )";
            //
            // menuItem2
            //
            this.menuItem2.Index = 0;
           
            this.menuItem2.Text = "复制( &C )";
           
            this.menuItem2.Click += new System.EventHandler( this.menuItem2_Click );
            //
            // menuItem3
            //
            this.menuItem3.Index = 1;
           
            this.menuItem3.Text = "粘贴( &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 = "帮助( &H )";
            //
            // menuItem5
            //
            this.menuItem5.Index = 0;
           
            this.menuItem5.Text = "帮助主题( &H )";
           
            this.menuItem5.Click += new System.EventHandler( this.menuItem5_Click );
            //
            // menuItem6
            //
            this.menuItem6.Index = 1;
           
            this.menuItem6.Text = "关于( &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 = "文件( &F )";
            //
            // menuItem9
            //
            this.menuItem9.Index = 0;
           
            this.menuItem9.Text = "打开windows计算器( &O )";
           
            this.menuItem9.Click += new System.EventHandler( this.menuItem9_Click );
            //
            // menuItem10
            //
            this.menuItem10.Index = 1;
           
            this.menuItem10.Text = "退出( &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 = "计算器";
           
            this.groupBox1.ResumeLayout( false );
           
            this.ResumeLayout( false );
        }
        #endregion
        #region 各变量和常数的声明
        public const
        int NULL = 0;
        // 定义操作码
        public const
        int ADD = 1;
        //表示加
        public const
        int SUB = 2;
        //减
        public const
        int MUL = 3;
        //乘
        public const
        int DIV = 4;
        //除
        public const
        int SQR = 5;
        //求平方
        public const
        int SQRT = 6;
        //求平方根
        public const
        int NODOT  = 0;
        // 定义是否点击了小数点,0 为没点
        public const
        int HASDOT = 1;
       
        private double res = 0;
        // 记录结果数
        private double tmp = 0;
        // 当前输入的操作数
        private
        int opt = NULL;
        // 记录操作码
        private
        int dot = NODOT;
        // 记录是否点击了小数点,0为没有点
        private
        int num = 0;
        // 记录输入操作数的个数
        private
        int dotnum = 0;
        // 记录小数点部分的个数
        string strOper;
        //获取操作符
        #endregion
        /// <summary>
        /// 应用程序的主入口点.
        /// </summary>
        [STAThread]
        static void Main( )
        {
            Application.Run( new Form1( ) );
        }
       
        /// <summary>
        #region 获取操作数事件
        //获取操作数事件
        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 )
                {
                    // 没有点击小数点
                    i = double.Parse( btnTmp.Tag.ToString( ) );
                    //取用户自定义的控件关联数,并转换成double型
                    tmp = tmp * 10 + i;
                    txtShow.Text = tmp.ToString( );
                    //将其放入文本显示屏啊
                }
                else
                // 点击了小数点
                {
                    dotnum++;
                    //记录小数点部分的个数
                    // 生成小数部分的新的数值
                    i = double.Parse( btnTmp.Tag.ToString( ) ) / System.Math.Pow( 10,dotnum );
                    tmp = tmp + i;
                    //将小数点后的值加到当前操做数
                    txtShow.Text = tmp.ToString( );
                }
            }
        }
        #endregion
        #region 等于事件和等于运算方法
        //等于事件
        private void btn_equ_Click( object sender, System.EventArgs e )
        {
            calc( );
        }
        //等于运算方法
        private void calc( )
        {
            // 生成结果
            if ( num == 0)
            //是否有操作数,没有就返回0
            {
                res = 0;
                tmp = 0;
                txtShow.Text = res.ToString( );
                return;
            }
            switch ( opt )  //找到对应的运算符进行计算
            {
                // 加法
                case ADD:
                res = res + tmp;
                break;
                // 减法
                case SUB:
                res = res - tmp;
                break;
                // 乘法
                case MUL:
                res = res * tmp; }