using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;
using?System.Threading.Tasks;

namespace?WindowsFormsDemo01
{
????class?ClassCalculator
????{
????????public?int?star?=?3;?//狀態
????????private?static?double?TextA;?????//第一個數
????????private?static?double?TextB;?????//第二個數
????????private?static?double?TextC;?????//計算結果
????????private?static?string?numDisplay;???//顯示結果
????????//--------------------------------------------------------

????????///?

????????///?計算器_驗證
????????///?

????????///?輸入框1
????????///?輸入框1
????????///?運算符號
????????///?
????????public?string?Verify（string?txtA?string?txtB?int?count）
????????{
????????????if?（txtA?==?string.Empty?||?txtB?==?string.Empty）
????????????{
????????????????star?=?2;
????????????????return?“第一（或二）個數字為空！“;
????????????}
????????????if?（count?==?4）
???

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2019-04-17?16:40??Demo01\
?????目錄???????????0??2019-04-17?16:40??Demo01\.vs\
?????目錄???????????0??2019-04-17?16:40??Demo01\.vs\WindowsFormsDemo01\
?????目錄???????????0??2019-04-17?16:41??Demo01\.vs\WindowsFormsDemo01\v16\
?????文件???????60416??2019-04-23?09:38??Demo01\.vs\WindowsFormsDemo01\v16\.suo
?????目錄???????????0??2019-04-17?16:41??Demo01\.vs\WindowsFormsDemo01\v16\Server\
?????目錄???????????0??2019-04-23?09:38??Demo01\.vs\WindowsFormsDemo01\v16\Server\sqlite3\
?????文件???????????0??2019-04-17?16:41??Demo01\.vs\WindowsFormsDemo01\v16\Server\sqlite3\db.lock
?????文件??????610304??2019-04-18?14:25??Demo01\.vs\WindowsFormsDemo01\v16\Server\sqlite3\storage.ide
?????目錄???????????0??2019-04-18?10:25??Demo01\WindowsFormsDemo01\
?????文件????????1160??2019-04-17?16:40??Demo01\WindowsFormsDemo01.sln
?????文件?????????189??2019-04-17?16:40??Demo01\WindowsFormsDemo01\App.config
?????目錄???????????0??2019-04-17?16:40??Demo01\WindowsFormsDemo01\bin\
?????目錄???????????0??2019-04-17?16:43??Demo01\WindowsFormsDemo01\bin\Debug\
?????文件???????19968??2019-04-18?10:25??Demo01\WindowsFormsDemo01\bin\Debug\WindowsFormsDemo01.exe
?????文件?????????189??2019-04-17?16:40??Demo01\WindowsFormsDemo01\bin\Debug\WindowsFormsDemo01.exe.config
?????文件???????44544??2019-04-18?10:25??Demo01\WindowsFormsDemo01\bin\Debug\WindowsFormsDemo01.pdb
?????文件????????3012??2019-04-18?10:25??Demo01\WindowsFormsDemo01\ClassCalculator.cs
?????文件????????2625??2019-04-18?10:12??Demo01\WindowsFormsDemo01\ClassNumScreen.cs
?????文件???????10377??2019-04-18?10:22??Demo01\WindowsFormsDemo01\Form1.cs
?????文件???????27095??2019-04-18?10:16??Demo01\WindowsFormsDemo01\Form1.Designer.cs
?????文件????????6011??2019-04-18?10:16??Demo01\WindowsFormsDemo01\Form1.resx
?????目錄???????????0??2019-04-17?16:40??Demo01\WindowsFormsDemo01\obj\
?????目錄???????????0??2019-04-18?14:23??Demo01\WindowsFormsDemo01\obj\Debug\
?????文件????????1435??2019-04-18?08:29??Demo01\WindowsFormsDemo01\obj\Debug\DesignTimeResolveAssemblyReferences.cache
?????文件????????7192??2019-04-18?09:43??Demo01\WindowsFormsDemo01\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache
?????目錄???????????0??2019-04-17?16:40??Demo01\WindowsFormsDemo01\obj\Debug\TempPE\
?????文件??????????42??2019-04-18?09:43??Demo01\WindowsFormsDemo01\obj\Debug\WindowsFormsDemo01.csproj.CoreCompileInputs.cache
?????文件?????????956??2019-04-18?10:20??Demo01\WindowsFormsDemo01\obj\Debug\WindowsFormsDemo01.csproj.FileListAbsolute.txt
?????文件????????1012??2019-04-18?10:16??Demo01\WindowsFormsDemo01\obj\Debug\WindowsFormsDemo01.csproj.GenerateResource.cache
?????文件???????11625??2019-04-18?14:23??Demo01\WindowsFormsDemo01\obj\Debug\WindowsFormsDemo01.csprojAssemblyReference.cache
............此處省略12個文件信息