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?mycalc
{
????public?partial?class?Form1?:?Form
????{
????????private?decimal?_num1?=?0_num2?=?0_result?=?0;
????????private?string?_op?=?““;
????????private?int?_opCount?=?0;
????????private?bool?_firstNumberFlag?=?false;

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

????????private?void?buttonNum1_Click（object?sender?EventArgs?e）
????????{
????????????if?（_firstNumberFlag?==?true）
????????????{
????????????????textBoxResult.Text?=?“1“;
????????????????_firstNumberFlag?=?false;
????????????}
????????????else
????????????????textBox

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2019-03-03?23:08??mycalc\
?????文件?????????766??2011-02-08?17:31??mycalc\Calc.ico
?????目錄???????????0??2019-03-03?23:08??mycalc\mycalc\
?????文件???????20549??2019-03-03?23:08??mycalc\mycalc\Form1.Designer.cs
?????文件???????20805??2019-03-03?23:08??mycalc\mycalc\Form1.cs
?????文件????????7264??2019-03-03?23:08??mycalc\mycalc\Form1.resx
?????文件?????????487??2019-02-26?17:01??mycalc\mycalc\Program.cs
?????目錄???????????0??2019-02-26?17:01??mycalc\mycalc\Properties\
?????文件????????1358??2019-02-26?17:01??mycalc\mycalc\Properties\AssemblyInfo.cs
?????文件????????2862??2019-02-26?17:01??mycalc\mycalc\Properties\Resources.Designer.cs
?????文件????????5612??2019-02-26?17:01??mycalc\mycalc\Properties\Resources.resx
?????文件????????1091??2019-02-26?17:01??mycalc\mycalc\Properties\Settings.Designer.cs
?????文件?????????249??2019-02-26?17:01??mycalc\mycalc\Properties\Settings.settings
?????目錄???????????0??2019-02-26?17:01??mycalc\mycalc\bin\
?????目錄???????????0??2019-02-26?21:48??mycalc\mycalc\bin\Debug\
?????文件???????22016??2019-03-03?23:03??mycalc\mycalc\bin\Debug\mycalc.exe
?????文件???????42496??2019-03-03?23:03??mycalc\mycalc\bin\Debug\mycalc.pdb
?????文件???????14328??2019-03-03?22:40??mycalc\mycalc\bin\Debug\mycalc.vshost.exe
?????文件?????????490??2017-10-30?08:42??mycalc\mycalc\bin\Debug\mycalc.vshost.exe.manifest
?????文件????????3723??2019-02-26?17:10??mycalc\mycalc\mycalc.csproj
?????目錄???????????0??2019-02-26?17:01??mycalc\mycalc\obj\
?????目錄???????????0??2019-03-03?23:03??mycalc\mycalc\obj\Debug\
?????目錄???????????0??2019-03-03?23:15??mycalc\mycalc\obj\Debug\Refactor\
?????目錄???????????0??2019-03-03?23:15??mycalc\mycalc\obj\Debug\TempPE\
?????文件?????????180??2019-03-03?23:03??mycalc\mycalc\obj\Debug\mycalc.Form1.resources
?????文件?????????180??2019-02-26?21:48??mycalc\mycalc\obj\Debug\mycalc.Properties.Resources.resources
?????文件?????????621??2019-03-03?23:00??mycalc\mycalc\obj\Debug\mycalc.csproj.FileListAbsolute.txt
?????文件?????????847??2019-03-03?23:03??mycalc\mycalc\obj\Debug\mycalc.csproj.GenerateResource.Cache
?????文件???????22016??2019-03-03?23:03??mycalc\mycalc\obj\Debug\mycalc.exe
?????文件???????42496??2019-03-03?23:03??mycalc\mycalc\obj\Debug\mycalc.pdb
?????文件?????????908??2019-02-26?17:01??mycalc\mycalc.sln
............此處省略1個文件信息