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?WindowsFormsApplication2
{
????public?partial?class?Form1?:?Form
????{
????????public?Form1（）
????????{
????????????InitializeComponent（）;
????????}

????????private?void?bt_add_Click（object?sender?EventArgs?e）
????????{
????????????Double?s1?=?0?s2?=?0result?=?0;
????????????if?（tb1.Text?!=““）?
????????????{
????????????????try
????????????????{
????????????????????s1?=?Convert.ToDouble（tb1.Text.ToString（）.Trim（））;
????????????????}
????????????????catch?{?MessageBox.Show（“請(qǐng)輸入正確的數(shù)字！“?“提示“）;?return;?}
????????????}
????????????if?（tb2.Text?!=?““）?
????????????{
????????????????try
????????????????{
????????????????????s2?=?Convert.ToDouble（tb2.Text.ToString（）.Trim（））;
????????????????}
????????????????catch?{?MessageBox.Show（“請(qǐng)輸入正確的數(shù)字！“?“提示“）;?return;?}
????????????}
????????????result?=?s1?+?s2;
????????????tb_result.Text?=?result.ToString（）;
?????????
????????}

????????private?void?bt_subtract_Click（object?sender?EventArgs?e）
????????{
????????????Double?s1?=?0?s2?=?0?result?=?0;
????????????if?（tb1.Text?!=?““）
????????????{
????????????????try
????????????????{
????????????????????s1?=?Convert.ToDouble（tb1.Text.ToString（）.Trim（））;
????????????????}
????????????????catch?{?MessageBox.Show（“請(qǐng)輸入正確的數(shù)字！“?“提示“）;?return;?}
????????????}
????????????if?（tb2.Text?!=?““）
????????????{
????????????????try
????????????????{
????????????????????s2?=?Convert.ToDouble（tb2.Text.ToString（）.Trim（））;
????????????????}
????????????????catch?{?MessageBox.Show（“請(qǐng)輸入正確的數(shù)字！“?“提示“）;?return;?}
????????????}
????????????result?=?s1?-?s2;
????????????tb_result.Text?=?result.ToString（）;
?????????
????????}

????????private?void?bt_multiply_Click（object?sender?EventArgs?e）
????????{
????????????Double?s1?=?0?s2?=?0?result?=?0;
????????????if?（tb1.Text?!=?““）
????????????{
????????????????try
????????????????{
????????????????????s1?=?Convert.ToDouble（tb1.Text.ToString（）.Trim（））;
????????????????}
????????????????catch?{?MessageBox.Show（“請(qǐng)輸入正確的數(shù)字！“?“提示“）;?return;?}
????????????}
????????????if?（tb2.Text?!=?““）
????????????{
????????????????try
????????????????{
????????????????????s2?=?Convert.ToDouble（tb2.Text.ToString（）.Trim（））;
????????????????}
????????????????catch?{?MessageBox.Show（“請(qǐng)輸入正確的數(shù)字！“?“提示“）;?return;?}
????????????}
????????????result?=?s1?*?s2;
????????????tb_result.Text?=?result.ToString（）;
?????????
????????}

????????private?void?bt_divide_Click（object?sender?EventArgs?e）
????????{
????????????Double?s1?=?0?s2?=?0?result?=?0;
????????????if?（tb1.Text?!=?““）
????????????{
????????????????try
????????????????{
????????????????????s1?=?Convert.ToDouble（tb1.Text.ToString（）.Trim（））;
????????????????}
????????????????catch?{?MessageBox.Show（“請(qǐng)輸入正確的數(shù)字！“?“提

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件??????11264??2015-01-06?10:33??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\bin\Debug\WindowsFormsApplication2.exe

?????文件??????26112??2015-01-06?10:33??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\bin\Debug\WindowsFormsApplication2.pdb

?????文件??????11600??2015-01-06?10:34??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\bin\Debug\WindowsFormsApplication2.vshost.exe

?????文件????????490??2010-03-17?22:39??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\bin\Debug\WindowsFormsApplication2.vshost.exe.manifest

?????文件???????3680??2015-01-06?10:14??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\Form1.cs

?????文件???????6970??2015-01-06?10:14??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\Form1.Designer.cs

?????文件???????5817??2015-01-06?10:14??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\Form1.resx

?????文件???????4440??2015-01-06?10:34??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\obj\x86\Debug\DesignTimeResolveAssemblyReferences.cache

?????文件???????6271??2015-01-06?10:33??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache

?????文件????????316??2015-01-06?10:33??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\obj\x86\Debug\GenerateResource.read.1.tlog

?????文件????????798??2015-01-06?10:33??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\obj\x86\Debug\GenerateResource.write.1.tlog

?????文件????????952??2015-01-06?10:13??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\obj\x86\Debug\WindowsFormsApplication2.csproj.FileListAbsolute.txt

?????文件??????11264??2015-01-06?10:33??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\obj\x86\Debug\WindowsFormsApplication2.exe

?????文件????????180??2015-01-06?10:33??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\obj\x86\Debug\WindowsFormsApplication2.Form1.resources

?????文件??????26112??2015-01-06?10:33??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\obj\x86\Debug\WindowsFormsApplication2.pdb

?????文件????????180??2015-01-06?09:50??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\obj\x86\Debug\WindowsFormsApplication2.Properties.Resources.resources

?????文件????????952??2015-01-06?10:34??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\obj\x86\Debug\簡(jiǎn)易計(jì)算器.csproj.FileListAbsolute.txt

?????文件????????505??2015-01-06?09:35??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\Program.cs

?????文件???????1392??2015-01-06?09:35??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\Properties\AssemblyInfo.cs

?????文件???????2899??2015-01-06?09:35??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\Properties\Resources.Designer.cs

?????文件???????5612??2015-01-06?09:35??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\Properties\Resources.resx

?????文件???????1110??2015-01-06?09:35??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\Properties\Settings.Designer.cs

?????文件????????249??2015-01-06?09:35??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\Properties\Settings.settings

?????文件???????3707??2015-01-06?09:50??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\簡(jiǎn)易計(jì)算器.csproj

?????文件????????896??2015-01-06?10:33??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2.sln

????..A..H.?????45056??2015-01-06?10:34??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2.suo

?????目錄??????????0??2015-01-06?10:34??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\obj\x86\Debug\TempPE

?????目錄??????????0??2015-01-06?10:34??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\obj\x86\Debug

?????目錄??????????0??2015-01-06?10:34??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\bin\Debug

?????目錄??????????0??2015-01-06?10:34??簡(jiǎn)易計(jì)算器\WindowsFormsApplication2\obj\x86

............此處省略8個(gè)文件信息