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

namespace?MyCalculator
{
????public?partial?class?Form1?:?Form
????{
????????Double?dbNumA;
????????Double?dbNumB;
????????bool?blnClr?blnFrstOpen;???//判斷是否清除，和第一個(gè)顯示的字符
????????String?strOper;?????????????//操作符
????????bool?bIsNzero?=?true;????????//判斷第二個(gè)操作數(shù)是否為0不為0則true

????????public?Form1（）
????????{
????????????InitializeComponent（）;
????????????dbNumA?=?0;
????????????dbNumB?=?0;
????????????blnFrstOpen?=?true;
????????????blnClr?=?true;
????????????strOper?=?new?string（‘=‘?1）;?
????????}
????????private?void?calculator（）
????????{
????????????switch?（strOper）
????????????{
????????????????case?“+“:
????????????????????dbNumA?+=?dbNumB;//加法運(yùn)算?
????????????????????break;
????????????????case?“-“:
????????????????????dbNumA?-=?dbNumB;//減法運(yùn)算?
????????????????????break;
????????????????case?“*“:
????????????????????dbNumA?*=?dbNumB;//乘法運(yùn)算?
????????????????????break;
????????????????case?“/“:
????????????????????if?（dbNumB?==?0）
????????????????????{
????????????????????????resultBox.Text?=?“Error“;
????????????????????????bIsNzero?=?false;
????????????????????}
????????????????????else
????????????????????dbNumA?/=?dbNumB;???//除法運(yùn)算?
????????????????????break;
????????????}
????????????strOper?=?“=“;??????????????//等號(hào)運(yùn)算?
????????????blnFrstOpen?=?true;
????????????if?（bIsNzero）
????????????{
????????????????resultBox.Text?=?Convert.ToString（dbNumA）;//將運(yùn)算結(jié)果轉(zhuǎn)換成字符型并輸出結(jié)果?

????????????????dbNumB?=?dbNumA;
????????????}
????????}
????????private?void?clear（）
????????{
????????????dbNumA?=?0;
????????????dbNumB?=?0;
????????????blnFrstOpen?=?true;
????????????resultBox.Text?=?““;
????????????resultBox.Focus（）;??//設(shè)置焦點(diǎn)為txtCalc?
????????}?

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

????????}
????

????????private?void?btnNum_Click（object?sender?EventArgs?e）
????????{???????????????
??????????????if（blnClr）?
??????????????resultBox.Text=““;?
??????????????Button?b3=（Button）sender;?
??????????????resultBox.Text+=b3.Text;?
??????????????
??????????????dbNumB=Convert.ToDouble（resultBox.Text）;?
??????????????blnClr=false;?
??
????????}

????????private?void?btn_clr（object?sender?EventArgs?e）
????????{
????????????clear（）;
????????}

????????private?void?btnOp_Click（object?sender?EventArgs?e）
????????{
????????????Button?tmp?=?（Button）sender;
????????????strOper?=?tmp.Text;
????????????if?（blnFrstOpen）??????????
????????????????dbNumA?=?dbNumB;???????????
????????????else
????????????????calculator（）;
????????????blnFrstOpen?=?false;
????????????blnClr?=?true;?
????????}

????????private?void?button_Eql_Click（object?sender?EventArgs?e）
????????{
????????????calculator（）;
????????}

????}
}

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

?????文件??????14336??2013-12-06?21:28??MyCalculator\bin\Debug\MyCalculator.exe

?????文件??????30208??2013-12-06?21:28??MyCalculator\bin\Debug\MyCalculator.pdb

?????文件??????11600??2013-12-06?23:00??MyCalculator\bin\Debug\MyCalculator.vshost.exe

?????文件????????490??2012-02-21?14:13??MyCalculator\bin\Debug\MyCalculator.vshost.exe.manifest

?????文件????????490??2012-02-21?14:13??MyCalculator\bin\Debug\WindowsFormsApplication1.vshost.exe.manifest

?????文件???????3134??2013-12-06?22:22??MyCalculator\Form1.cs

?????文件??????16665??2013-12-06?16:31??MyCalculator\Form1.Designer.cs

?????文件???????5817??2013-12-06?16:31??MyCalculator\Form1.resx

?????文件???????3720??2013-12-06?09:36??MyCalculator\MyCalculator.csproj

?????文件????????865??2013-12-06?09:54??MyCalculator\MyCalculator.sln

????..A..H.?????27648??2013-12-06?23:03??MyCalculator\MyCalculator.suo

?????文件???????5339??2013-12-06?09:26??MyCalculator\obj\x86\Debug\DesignTimeResolveAssemblyReferences.cache

?????文件???????6555??2013-12-06?21:28??MyCalculator\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache

?????文件???????3350??2013-12-06?23:00??MyCalculator\obj\x86\Debug\MyCalculator.csproj.FileListAbsolute.txt

?????文件????????975??2013-12-06?20:22??MyCalculator\obj\x86\Debug\MyCalculator.csproj.GenerateResource.Cache

?????文件???????9054??2013-12-06?21:28??MyCalculator\obj\x86\Debug\MyCalculator.csprojResolveAssemblyReference.cache

?????文件??????14336??2013-12-06?21:28??MyCalculator\obj\x86\Debug\MyCalculator.exe

?????文件????????180??2013-12-06?20:22??MyCalculator\obj\x86\Debug\MyCalculator.Form1.resources

?????文件??????30208??2013-12-06?21:28??MyCalculator\obj\x86\Debug\MyCalculator.pdb

?????文件????????180??2013-12-06?20:22??MyCalculator\obj\x86\Debug\MyCalculator.Properties.Resources.resources

?????文件???????4608??2013-12-06?09:39??MyCalculator\obj\x86\Debug\TempPE\Properties.Resources.Designer.cs.dll

?????文件????????963??2013-12-06?09:39??MyCalculator\obj\x86\Debug\WindowsFormsApplication1.csproj.FileListAbsolute.txt

?????文件????????975??2013-12-05?13:24??MyCalculator\obj\x86\Debug\WindowsFormsApplication1.csproj.GenerateResource.Cache

?????文件????????493??2013-12-06?09:47??MyCalculator\Program.cs

?????文件???????1370??2013-12-06?09:47??MyCalculator\Properties\AssemblyInfo.cs

?????文件???????2864??2013-12-06?09:35??MyCalculator\Properties\Resources.Designer.cs

?????文件???????5612??2013-12-04?21:49??MyCalculator\Properties\Resources.resx

?????文件???????1112??2013-12-06?09:35??MyCalculator\Properties\Settings.Designer.cs

?????文件????????249??2013-12-04?21:49??MyCalculator\Properties\Settings.settings

?????目錄??????????0??2013-12-06?09:39??MyCalculator\obj\x86\Debug\TempPE

............此處省略11個(gè)文件信息