C# 简易计算器

基于VS15 的 C# .NET Framework 4.5 用于简单的加减乘除以及平方开方等计算

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;

namespace Calculator
{
    public partial class MyCalculator : Form
    {

        double a = 0;
        double b = 0;
        bool c = false;
        string d;

        public MyCalculator（）
        {
            InitializeComponent（）;

        }

        /// 

        /// 窗体加载 结果默认空字符
        /// 

        /// 
        /// 
        private void MyCalculator_Load（object sender EventArgs e）
        {
            txtResult.Text = ““;
            txtResult.TextAlign = Horizonta

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2019-08-15 12:10  .vs\
     目录           0  2019-08-15 12:10  .vs\Calculator\
     目录           0  2019-08-15 12:10  .vs\Calculator\v14\
     文件       47104  2019-09-10 15:40  .vs\Calculator\v14\.suo
     文件         997  2019-08-15 12:10  Calculator.sln
     目录           0  2019-09-10 15:54  Calculator\
     文件         184  2019-08-15 12:16  Calculator\App.config
     目录           0  2019-08-15 12:11  Calculator\bin\
     目录           0  2019-09-10 15:55  Calculator\bin\Debug\
     文件        4096  2018-08-03 09:26  Calculator\bin\Debug\AnotherAssembly.dll
     文件        7680  2018-08-03 09:26  Calculator\bin\Debug\AnotherAssembly.pdb
     文件      153600  2019-09-10 15:55  Calculator\bin\Debug\Calculator.exe
     文件         184  2019-08-15 12:16  Calculator\bin\Debug\Calculator.exe.config
     文件       30208  2019-09-10 15:55  Calculator\bin\Debug\Calculator.pdb
     文件       22696  2019-09-10 15:41  Calculator\bin\Debug\Calculator.vshost.exe
     文件         184  2019-08-15 12:16  Calculator\bin\Debug\Calculator.vshost.exe.config
     文件         490  2019-03-19 12:46  Calculator\bin\Debug\Calculator.vshost.exe.manifest
     文件        5632  2018-08-03 09:26  Calculator\bin\Debug\ControlCal.exe
     文件         189  2018-07-31 11:13  Calculator\bin\Debug\ControlCal.exe.config
     文件       15872  2018-08-03 09:26  Calculator\bin\Debug\ControlCal.pdb
     文件       22696  2018-08-02 11:15  Calculator\bin\Debug\ControlCal.vshost.exe
     文件         189  2018-07-31 11:13  Calculator\bin\Debug\ControlCal.vshost.exe.config
     文件         490  2018-04-12 07:35  Calculator\bin\Debug\ControlCal.vshost.exe.manifest
     目录           0  2019-08-15 12:11  Calculator\bin\Debug\de\
     文件      179496  2018-12-13 15:55  Calculator\bin\Debug\de\DevExpress.Data.v15.1.resources.dll
     文件       14120  2018-12-13 15:55  Calculator\bin\Debug\de\DevExpress.Printing.v15.1.Core.resources.dll
     文件       12072  2018-12-13 15:55  Calculator\bin\Debug\de\DevExpress.Sparkline.v15.1.Core.resources.dll
     文件       26408  2018-12-13 15:55  Calculator\bin\Debug\de\DevExpress.Utils.v15.1.resources.dll
     文件      105256  2018-12-13 15:55  Calculator\bin\Debug\de\DevExpress.XtraEditors.v15.1.resources.dll
     文件     3694376  2018-12-13 15:55  Calculator\bin\Debug\DevExpress.Data.v15.1.dll
     文件     1147587  2018-12-13 15:55  Calculator\bin\Debug\DevExpress.Data.v15.1.xml
............此处省略54个文件信息