计算器编程代码

精选文库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 calculator public partial class Form1 : Form public Form1() InitializeComponent(); private void Form1_Load(object sender, EventArgs e) private void btn_Add_Click(object sender, EventArgs e) Button btn = (Button)sender; /空格用来分隔数值和运算符 txt_Result.Text = txt_Result.Text + + btn .Text + ; private void btn_Result_Click(object sender, EventArgs e) /保存计算结果 double d_result; /保存文本框中的算术表达式 string s_txt = txt_Result.Text; /查找空格位置 int space = s_txt.IndexOf( ); /s1保存第一个运算数 string s1 = s_txt.Substring( 0, space ); /operation 用来保存运算数 char opoperation = Convert.ToChar(s_txt.Substring(space + 1), 1); /s2保存第二个运算数 string s2 = s_txt.Substring(space + 3); /将运算数从 string 转成 Double型 double arg1 = Convert.ToDouble(s1); double arg2 = Convert.ToDouble(s2); /根据运算符进行计算 switch (opoperation ) case +: d_result = arg1 + arg2; break; case -: d_result = arg1 - arg2; break; case *: d_result = arg1 * arg2; break; case /: if (arg2 = 0) /抛出异常 throw new ApplicationException(); else d_result = arg1 / arg2; break; default: throw new ApplicationException(); /将计算结果显示在文本框中 txt_Result.Text = d_result.ToString(); private void btn_Clear_Click(object sender, EventArgs e) /将文本清空 txt_Result.Text = ; private void button0_Click(object sender, EventArgs e) Button btn = (Button)sender; txt_Result.Text += btn.Text; private void but1_Click(object sender, EventArgs e) Button btn = (Button)sender; /空格用来分隔数值和运算符 txt_Result.Text = txt_Result.Text + + btn.Text + ; private void but2_Click(object sender, EventArgs e) Button btn = (Button)sender; /空格用来分隔数值和运算符 txt_Result.Text = txt_Result.Text + + btn.Text + ; private void but3_Click(object sender, EventArgs e) Button btn = (Button)sender; /空格用来分隔数值和运算符 txt_Result.Text = txt_Result.Text + + btn.Text + ; private void button1_Click(object sender, EventArgs e) Button btn = (Button)sender; txt_Result.Text += btn.Text; private void button2_Click(object sender, EventArgs e) Button btn = (Button)sender; txt_Result.Text += btn.Text; private void button3_Click(object sender, EventArgs e) Button btn = (Button)sender; txt_Result.Text += btn.Text; private void button4_Click(object sender, EventArgs e) Button btn = (Button)sender; txt_Result.Text += btn.Text; private void button5_Click(object sender, EventArgs e) Button btn = (Button)sender; txt_Result.Text += btn.Text; private void button6_Click(object sender, EventArgs e) Button btn = (Button)sender; txt_Result.Text += btn.Text; private void button7_Click(object sender, EventArgs e) Button btn = (Button)sender; txt_Result.Text += btn.Text; private void button8_Click(object sender, EventArgs e) Button btn = (Button)sender; txt_Result.Text += btn.Text; private void button9_Click(object sender, EventArgs e) Button btn = (Button)sender; t