using?System;
using?System.Collections.Generic;
using?System.ComponentModel;
using?System.Data;
using?System.Drawing;
using?System.Linq;
using?System.Text;
using?System.Threading.Tasks;
using?System.Windows.Forms;

namespace?CalculatorPro
{
????public?partial?class?Form1?:?Form
????{
????????decimal?num1;
????????decimal?num2;
????????string?operation;
????????public?Form1（）
????????{
????????????InitializeComponent（）;
????????}
????????private?void?input（string?a）
????????{
????????????if?（textBox1.Text?==?“0“）
????????????????textBox1.Text?=?a;
????????????else
????????????????textBox1.Text?+=?a;
????????}

????????private?void?Form1_Load（object?sender?EventArgs?e）
????????{
????????????
????????}

????????private?void?button2_Click（object?sender?Event

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件???????26145??2019-02-13?18:55??description.html
?????文件????????9845??2019-02-13?18:55??description\Galleries.css
?????文件????????1727??2019-02-13?18:55??description\Layout.css
?????文件???????75510??2019-02-13?18:55??description\Brand.css
?????文件???????28018??2019-02-13?18:55??description\Calc.jpg
?????文件????????1674??2019-02-13?18:55??license.rtf
?????目錄???????????0??2019-02-13?18:55??C#\.vs\
?????目錄???????????0??2019-02-13?18:55??C#\.vs\CalculatorPro\
?????目錄???????????0??2019-02-13?18:55??C#\.vs\CalculatorPro\v14\
?????文件???????45568??2019-02-13?18:55??C#\.vs\CalculatorPro\v14\.suo
?????文件????????1006??2019-02-13?18:55??C#\CalculatorPro.sln
?????目錄???????????0??2019-02-13?18:55??C#\CalculatorPro\
?????文件?????????189??2019-02-13?18:55??C#\CalculatorPro\App.config
?????目錄???????????0??2019-02-13?18:55??C#\CalculatorPro\bin\
?????目錄???????????0??2019-02-13?18:55??C#\CalculatorPro\bin\Debug\
?????文件???????17920??2019-02-13?18:55??C#\CalculatorPro\bin\Debug\CalculatorPro.exe
?????文件?????????189??2019-02-13?18:55??C#\CalculatorPro\bin\Debug\CalculatorPro.exe.config
?????文件???????30208??2019-02-13?18:55??C#\CalculatorPro\bin\Debug\CalculatorPro.pdb
?????文件???????22696??2019-02-13?18:55??C#\CalculatorPro\bin\Debug\CalculatorPro.vshost.exe
?????文件?????????189??2019-02-13?18:55??C#\CalculatorPro\bin\Debug\CalculatorPro.vshost.exe.config
?????文件?????????490??2019-02-13?18:55??C#\CalculatorPro\bin\Debug\CalculatorPro.vshost.exe.manifest
?????文件????????3924??2019-02-13?18:55??C#\CalculatorPro\CalculatorPro.csproj
?????文件????????5484??2019-02-13?18:55??C#\CalculatorPro\Form1.cs
?????文件???????25737??2019-02-13?18:55??C#\CalculatorPro\Form1.Designer.cs
?????文件????????5817??2019-02-13?18:55??C#\CalculatorPro\Form1.resx
?????目錄???????????0??2019-02-13?18:55??C#\CalculatorPro\obj\
?????目錄???????????0??2019-02-13?18:55??C#\CalculatorPro\obj\Debug\
?????文件?????????645??2019-02-13?18:55??C#\CalculatorPro\obj\Debug\CalculatorPro.csproj.FileListAbsolute.txt
?????文件????????1012??2019-02-13?18:55??C#\CalculatorPro\obj\Debug\CalculatorPro.csproj.GenerateResource.Cache
?????文件????????2384??2019-02-13?18:55??C#\CalculatorPro\obj\Debug\CalculatorPro.csprojResolveAssemblyReference.cache
?????文件???????17920??2019-02-13?18:55??C#\CalculatorPro\obj\Debug\CalculatorPro.exe
............此處省略16個文件信息