选择自 CSPRO 的 Blog
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()
