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;
using?System.IO;


namespace?WindowsFormsApplication2
{
????public?partial?class?Form1?:?Form
????{


????????public?Form1（）
????????{
????????????InitializeComponent（）;
?????????
????????}

???

????????Double?temp1?=?-1;//記錄計算公式的第1個數字?更新類型為double
????????Double?temp2?=?-1;//記錄計算公式的第2個數字?更新類型為double
????????int?pos?=?0;??????//存儲計算方式

????????public?void?addNum（int?num）
????????{
????????????textBox1.Text?=?textBox1.Text?+?num.ToString（）;

????????????//如果顯示框的第一個字符為0，而且第二個字符不是小數點，則自動去掉第一個字符的‘0’
????????????if?（textBox1.Text.Length?>=?2）
????????????{
????????????????if?（te

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2016-12-12?00:27??-計算器\
?????目錄???????????0??2016-12-13?11:31??-計算器\WindowsFormsApplication2\
?????文件?????????962??2016-12-08?14:10??-計算器\WindowsFormsApplication2.sln
?????文件???????14848??2016-12-13?11:31??-計算器\WindowsFormsApplication2.suo
?????目錄???????????0??2016-12-12?00:27??-計算器\WindowsFormsApplication2\bin\
?????目錄???????????0??2016-12-12?00:27??-計算器\WindowsFormsApplication2\bin\Debug\
?????文件???????82432??2016-12-08?19:30??-計算器\WindowsFormsApplication2\bin\Debug\WindowsFormsApplication2.exe
?????文件???????32256??2016-12-08?19:30??-計算器\WindowsFormsApplication2\bin\Debug\WindowsFormsApplication2.pdb
?????文件???????14328??2016-12-13?11:32??-計算器\WindowsFormsApplication2\bin\Debug\WindowsFormsApplication2.vshost.exe
?????文件?????????490??2009-06-11?05:14??-計算器\WindowsFormsApplication2\bin\Debug\WindowsFormsApplication2.vshost.exe.manifest
?????文件????????5839??2016-12-13?11:31??-計算器\WindowsFormsApplication2\Form1.cs
?????文件???????13431??2016-12-13?11:31??-計算器\WindowsFormsApplication2\Form1.Designer.cs
?????文件??????107586??2016-12-13?11:31??-計算器\WindowsFormsApplication2\Form1.resx
?????目錄???????????0??2016-12-12?00:27??-計算器\WindowsFormsApplication2\obj\
?????目錄???????????0??2016-12-12?00:27??-計算器\WindowsFormsApplication2\obj\Debug\
?????目錄???????????0??2016-12-08?14:10??-計算器\WindowsFormsApplication2\obj\Debug\TempPE\
?????文件????????1409??2016-12-13?11:32??-計算器\WindowsFormsApplication2\obj\Debug\WindowsFormsApplication2.csproj.FileListAbsolute.txt
?????文件?????????847??2016-12-08?19:27??-計算器\WindowsFormsApplication2\obj\Debug\WindowsFormsApplication2.csproj.GenerateResource.Cache
?????文件???????82432??2016-12-08?19:30??-計算器\WindowsFormsApplication2\obj\Debug\WindowsFormsApplication2.exe
?????文件???????68212??2016-12-08?19:27??-計算器\WindowsFormsApplication2\obj\Debug\WindowsFormsApplication2.Form1.resources
?????文件???????32256??2016-12-08?19:30??-計算器\WindowsFormsApplication2\obj\Debug\WindowsFormsApplication2.pdb
?????文件?????????180??2016-12-08?17:32??-計算器\WindowsFormsApplication2\obj\Debug\WindowsFormsApplication2.Properties.Resources.resources
?????文件?????????505??2016-12-08?14:10??-計算器\WindowsFormsApplication2\Program.cs
?????目錄???????????0??2016-12-12?00:27??-計算器\WindowsFormsApplication2\Properties\
?????文件????????1406??2016-12-08?14:10??-計算器\WindowsFormsApplication2\Properties\AssemblyInfo.cs
?????文件????????2898??2016-12-08?14:10??-計算器\WindowsFormsApplication2\Properties\Resources.Designer.cs
?????文件????????5612??2016-12-08?14:10??-計算器\WindowsFormsApplication2\Properties\Resources.resx
?????文件????????1109??2016-12-08?14:10??-計算器\WindowsFormsApplication2\Properties\Settings.Designer.cs
?????文件?????????249??2016-12-08?14:10??-計算器\WindowsFormsApplication2\Properties\Settings.settings
?????文件????????3794??2016-12-13?11:30??-計算器\WindowsFormsApplication2\WindowsFormsApplication2.csproj