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;
using?System.Text.Regularexpressions;

namespace?Calculator
{
????public?partial?class?MainForm?:?Form
????{
????????bool?isOver?=?false;?//標記一次運算是否結束，true為結束，false為沒結束
????????bool?isMinus?=?false;?//判斷一個數是否為負數，true為負，false為正
????????string?s1?=?null;
????????Stack?optr?=?new?Stack（）;??//運算符棧
????????Stack?opnd?=?new?Stack（）;??//運算數棧
????????public?MainForm（）
????????{
????????????InitializeComponent（）;
????????????txtFormula.Focus（）;
????????????optr.Push（“=“）;
????????}

????????/*private?void?txtFormula_KeyPress（objec

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2016-06-18?00:27??Calculator\
?????目錄???????????0??2016-05-07?16:56??Calculator\.vs\
?????目錄???????????0??2016-05-07?16:56??Calculator\.vs\Calculator\
?????目錄???????????0??2016-05-07?16:56??Calculator\.vs\Calculator\v14\
?????文件????????3584??2016-05-07?16:56??Calculator\.vs\Calculator\v14\.suo
?????文件?????????189??2016-04-30?10:23??Calculator\App.config
?????文件????????3974??2016-05-02?13:01??Calculator\Calculator.csproj
?????文件?????????997??2016-05-09?21:23??Calculator\Calculator.sln
?????文件??????????60??2016-05-02?12:36??Calculator\ClassDiagram1.cd
?????文件???????28269??2016-05-11?11:30??Calculator\MainForm.Designer.cs
?????文件???????16022??2016-05-11?11:30??Calculator\MainForm.cs
?????文件???????20617??2016-05-11?11:30??Calculator\MainForm.resx
?????文件?????????525??2016-04-30?10:55??Calculator\Program.cs
?????目錄???????????0??2016-04-30?10:23??Calculator\Properties\
?????文件????????1328??2016-04-30?10:23??Calculator\Properties\AssemblyInfo.cs
?????文件????????2833??2016-04-30?10:23??Calculator\Properties\Resources.Designer.cs
?????文件????????5612??2016-04-30?10:23??Calculator\Properties\Resources.resx
?????文件????????1097??2016-04-30?10:23??Calculator\Properties\Settings.Designer.cs
?????文件?????????249??2016-04-30?10:23??Calculator\Properties\Settings.settings
?????目錄???????????0??2016-04-30?10:23??Calculator\bin\
?????目錄???????????0??2016-05-07?17:28??Calculator\bin\Debug\
?????文件???????31232??2016-05-11?11:30??Calculator\bin\Debug\Calculator.exe
?????文件?????????189??2016-04-30?10:23??Calculator\bin\Debug\Calculator.exe.config
?????文件???????30208??2016-05-11?11:30??Calculator\bin\Debug\Calculator.pdb
?????文件???????22696??2016-05-11?11:30??Calculator\bin\Debug\Calculator.vshost.exe
?????文件?????????189??2016-04-30?10:23??Calculator\bin\Debug\Calculator.vshost.exe.config
?????文件?????????490??2015-10-30?15:19??Calculator\bin\Debug\Calculator.vshost.exe.manifest
?????目錄???????????0??2016-07-22?22:29??Calculator\bin\Release\
?????目錄???????????0??2016-04-30?10:23??Calculator\obj\
?????目錄???????????0??2016-05-11?11:30??Calculator\obj\Debug\
?????文件???????10228??2016-05-11?11:30??Calculator\obj\Debug\Calculator.MainForm.resources
............此處省略13個文件信息