using System;using System.Drawing;using System.Windows;using System.Windows.Forms;using System.Collections;using System.ComponentModel;using System.Data;namespace comput{ ///

/// 这是一个计算器的简单实现。 ///

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; ///

/// 必需的设计器变量。 ///

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 // } ///

/// 清理所有正在使用的资源。 ///

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 ///

/// 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。 ///

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

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