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

namespace?WindowsFormsDemo02
{
????///?

????///?計算器類
????///?

????class?ClassCalculator
????{
????????#region?變量
????????public?int?star?=?3;????????????????//提示狀態（0=“正常“1=“錯誤“2=“提示“）
????????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
????????#endregion

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

????????///?計算器_驗證
????????///?

????????///?輸入框1
????????///?輸入框1
????????///?運算符號
????????///?