沈学友计算器

实验五/六：Windows 界面设计基础一、实验目的熟悉 Windows 窗体及其各种基本控件的功能和用法二、实验内容利用 Windows 窗体及其各种基本控件实现简易计算器。三、实验组织运行要求编写的源程序要立即上机编译运行来检验程序中存在的问题。通过运行的结果验证程序的功能是否实现。有一些系统类的方法、变量也需要上机实验去了解它们的含义。四、实验条件Windows XP， Visual Studio 2005五、实验步骤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 学友计算器public partial class Form1 : Formpublic Form1()InitializeComponent();private string fh = “;private string first = “;private void button1_Click(object sender, EventArgs e)textBox1.Text = textBox1.Text+ “1“;private void button2_Click(object sender, EventArgs e)textBox1.Text = textBox1.Text + “2“;private void button3_Click(object sender, EventArgs e)textBox1.Text = textBox1.Text + “3“;private void button4_Click(object sender, EventArgs e)textBox1.Text = textBox1.Text + “4“;private void button5_Click(object sender, EventArgs e)textBox1.Text = textBox1.Text + “5“;private void button6_Click(object sender, EventArgs e)textBox1.Text = textBox1.Text + “6“;private void button7_Click(object sender, EventArgs e)textBox1.Text = textBox1.Text + “7“;private void button8_Click(object sender, EventArgs e)textBox1.Text = textBox1.Text + “8“;private void button9_Click(object sender, EventArgs e)textBox1.Text = textBox1.Text + “9“;private void button10_Click(object sender, EventArgs e)textBox1.Text = textBox1.Text + “0“;private void buttondot_Click(object sender, EventArgs e)if (textBox1.Text.IndexOf(“.“) 0)textBox1.Text += “.“; /如果textBox1中的“.”个数小于0（即没有），则在数后面加一个“.”else /如果textBox1中有了一个以上的“.”，则什么也不做private void buttonFs_Click(object sender, EventArgs e) /表示正负数textBox1.Text = Convert.ToString(Convert .ToDouble (this.textBox1.Text) * -1);private void buttonbs_Click(object sender, EventArgs e) /退格if (textBox1.Text = “)textBox1.Text = “;elsetextBox1.Text = textBox1.Text.Substring(0, textBox1.Text.Length - 1);private void buttonClear_Click(object sender, EventArgs e)textBox1.Text = “;private void buttonAdd_Click(object sender, EventArgs e)first = textBox1.Text;textBox1.Text = “;fh = “+“;private void buttonsub_Click(object sender, EventArgs e)first = textBox1.Text;textBox1.Text = “;fh = “-“;private void buttonMul_Click(object sender, EventArgs e)first = textBox1.Text;textBox1.Text = “;fh = “*“;private void buttonDis_Click(object sender, EventArgs e)first = textBox1.Text;textBox1.Text = “;fh = “/“;private void buttonQy_Click(object sender, EventArgs e)first = textBox1.Text;textBox1.Text = “;fh = “%“;private void buttonx2_Click(object sender, EventArgs e)if (textBox1.Text = “)textBox1.Text = “;elsefirst = textBox1.Text;textBox1.Text = Convert.ToString(Convert.ToDouble(textBox1.Text) * Convert.ToDouble(textBox1.Text);private void buttonsqrt_Click(object sender, EventArgs e)if (textBox1.Text = “)textBox1.Text = “;elsefirst = textBox1.Text;if (Convert.ToDouble(first) 0)MessageBox.Show(“开平方根的数不能小于0，请重新输入“, “错误“, MessageBoxButtons.OK, MessageBoxIcon.Error);elsetextBox1.Text = Convert.ToString(Math.Sqrt(Convert.ToDouble(first);private void buttonDy_Click(object sender, EventArgs e)if (textBox1.Text = “)textBox1.Text = “;elseswitch (fh)case “+“:textBox1.Text = Convert.ToString(Convert.ToDouble(first) + Convert.ToDouble(textBox1.Text);break;case “-“:textBox1.Text = Convert.ToString(Convert.ToDouble(first) - Convert.ToDouble(textBox1.Text);break;case “*“:textBox1.Text = Convert.ToString(Convert.ToDouble(first) * Convert.ToDouble(textBox1.Text);break;case “/“:if (Convert.ToDouble(textBox1.Text) = 0)MessageBox.Show(“除数不能为0“, “错误“, MessageBoxButtons.OK, MessageBoxIcon.Error);elsetextBox1.Text = Convert.ToString(Convert.ToDouble(first) /