使用Visual Studio编写计算器

1：首先，打开Visual Stdio

2：创建如图选择的项目

3：取个名字，点创建

4：稍等片刻就可以如图所示进行规划自己计算器的位置了，我只用到的Button和TextBox

5：右击Botton后选择属性

可以对其进行属性设置，简单点的话如下两图所示



7：然后进行对按键进行内部程序设计


8：下面的有点多，不着急哈，大部分都是差不多的，可以稍微看看中间部分的，理解机理就so easy

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 计算器
{
     
    public partial class Form1 : Form
    {
     
        public Form1()
        {
     
            InitializeComponent();
        }
        Double Lnum, Rnum, Res;
        String Flag;
        int i=0;

        private void Form1_Load(object sender, EventArgs e)
        {
     

        }

        private void button13_Click(object sender, EventArgs e) //按键.
        {
     
			if (i == 0 ){
     
            textBox1.Text += ".";
            i=1;
            } 
        }

        private void button1_Click(object sender, EventArgs e) //按键1
        {
     
            textBox1.Text += "1"; 
        }

        private void button2_Click(object sender, EventArgs e) //按键2
        {
     
            textBox1.Text += "2";
        }

        private void button3_Click(object sender, EventArgs e) //按键3
        {
     
            textBox1.Text += "3";
        }

        private void button4_Click(object sender, EventArgs e) //按键4
        {
     
            textBox1.Text += "4";
        }

        private void button5_Click(object sender, EventArgs e) //按键5
        {
     
            textBox1.Text += "5";
        }

        private void button6_Click(object sender, EventArgs e) //按键6
        {
     
            textBox1.Text += "6";
        }

        private void button7_Click(object sender, EventArgs e) //按键7
        {
     
            textBox1.Text += "7";
        }

        private void button8_Click(object sender, EventArgs e) //按键8
        {
     
            textBox1.Text += "8";
        }

        private void button9_Click(object sender, EventArgs e) //按键9
        {
     
            textBox1.Text += "9";
        }

        private void button11_Click(object sender, EventArgs e) //进行+法
        {
     
            Lnum = Convert.ToDouble(textBox1.Text);
            Flag = "+";
            textBox1.Text = ""; 
            i=0;
        }

        private void button14_Click(object sender, EventArgs e)  //等号公式
        {
     
            Rnum = Convert.ToDouble(textBox1.Text);
            if (Flag == "+") Res = Lnum + Rnum;
            else if (Flag == "-") Res = Lnum - Rnum;
            else if (Flag == "*") Res = Lnum * Rnum;
            else if(Flag == "/") Res = Lnum / Rnum;
            else {
      
            	Lnum = Convert.ToDouble(textBox1.Text);
                Res = Lnum;
            }
            textBox1.Text = Res.ToString() ; 
        }

        private void button10_Click(object sender, EventArgs e)//进行-法
        {
     
            Lnum = Convert.ToDouble(textBox1.Text);
            Flag = "-";
            textBox1.Text = "";
            i=0;
        }

        private void button16_Click(object sender, EventArgs e)//进行*法
        {
     
            Lnum = Convert.ToDouble(textBox1.Text);
            Flag = "*";
            textBox1.Text = "";
            i=0;
        }

        private void button12_Click(object sender, EventArgs e)//归零
        {
     
            Lnum = Rnum = 0;
            textBox1.Text = "";
        }

        private void button15_Click(object sender, EventArgs e)//进行/法
        {
     
            Lnum = Convert.ToDouble(textBox1.Text);
            Flag = "/";
            textBox1.Text = "";
            i=0;
        }

        private void button17_Click(object sender, EventArgs e)//按键0
        {
     
                textBox1.Text += "0";
        }
    }
}

上边的很好理解，注意一下区别，大部分都是CTRL+C，CTRL+V来的，挺简单的…
然后分析一下以上的问题：
1、对于清0（“C”）选项，清0之后会无数，也就是无法进行计算
2、目前对于括号和加减乘除的先后顺序需要进行改进
3、功能不够齐全
等我再想想，慢慢来吧，以上进行一下简单的计算任务是完全么的问题的…