计算器用算符优先实现

可以计算加减乘除，输入数据，可以计算结果.

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

namespace WindowsApplication1
{

    public partial class Form1 : Form
    {
        public string input;   //记录输入的表达式
        public int[] logo = new int[100];   //标记每个字符的类型
        public int n = 0;         //标记输入字符的数量
        public int[] zi = new int[100];        //记录每次输入的长度；
        public int countleft = 0;              //标记左括号的个数
        public int countright = 0;              //标记右括号的个数
        public int countlog = 0;               //textBox1用于显示表达式，textBox2用于显示计算过的表达式，textBox3用于显示表达式的计算结果
        public int countlogkey = 0;            //标记用于LOG（A，B）中“，”的个数，以便判断log中有无输入错误.
        public int t = 0;
        public char[] op = new char[21];
        public int keys = 0;

        public Form1（）
        {

            InitializeComponent（）;

            textBox1.Text = input;

        }

        private void button1_Click（object sender EventArgs e）         //.（小数点）      标记为1
        {
           
            label4.Text = ““;
             input = textBox1.Text;
            input += “1“;                                              //0到9           标记为2
            textBox1.Text = input;                                    //%（百分号）       标记为3
            logo[n] = 2;                                              //*/+-         标记为4
                                                                      //^（请方号）       标记为5
            zi[n] = 1;                                                 // （ （左括号）    标记为6
            Lex（）;                                                  　//）（右括号）       标记为7
        }                                                             　  //sincostanasinacosatan
        private void button2_Click（object sender EventArgs e）        //loglgln，sqrt  标记为8
        {
            input = textBox1.Text;                                   //               标记为9
            input += “2“;                                             //@ （负号）      标记为10
            textBox1.Text = input;                                    //# （结束符）     标记为11
            logo[n] = 2;
            zi[n] = 1;
            Lex（）;
        }

        private void button3_Click（object sender EventArgs e）
        {
            label4.Text = ““;
            input = textBox1.Text;
            input += “3“;
            textBox1.Text = input;
            logo[n] = 2;

            zi[n] = 1;
            Lex（）;
        }

        private void button4_Click（object sender EventArgs e）
        {
            label4.Text = ““;
            input = textBox1.Text;
            input += “4“;
            textBox1.Text = input;
            logo[n] = 2;
            zi[n] = 1;
            Lex（）;
        }

        private void button5_Click（object sender EventArgs e）
        {
            label

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     文件         944  2003-10-26 16:02  WindowsApplication1\WindowsApplication1.sln
     文件       33280  2009-04-26 12:51  WindowsApplication1\WindowsApplication1.suo
     目录           0  2009-04-27 15:10  WindowsApplication1\WindowsApplication1\
     目录           0  2009-04-27 15:10  WindowsApplication1\WindowsApplication1\bin\
     目录           0  2009-04-27 15:10  WindowsApplication1\WindowsApplication1\bin\Debug\
     文件       57344  2009-04-26 12:51  WindowsApplication1\WindowsApplication1\bin\Debug\WindowsApplication1.exe
     文件       87552  2009-04-26 12:51  WindowsApplication1\WindowsApplication1\bin\Debug\WindowsApplication1.pdb
     文件        5632  2005-11-11 22:25  WindowsApplication1\WindowsApplication1\bin\Debug\WindowsApplication1.vshost.exe
     文件       55771  2009-04-26 12:51  WindowsApplication1\WindowsApplication1\Form1.cs
     文件       57783  2009-04-26 12:51  WindowsApplication1\WindowsApplication1\Form1.Designer.cs
     文件        5814  2009-04-26 12:51  WindowsApplication1\WindowsApplication1\Form1.resx
     目录           0  2009-04-27 15:10  WindowsApplication1\WindowsApplication1\obj\
     目录           0  2009-04-27 15:10  WindowsApplication1\WindowsApplication1\obj\Debug\
     目录           0  2009-04-27 15:10  WindowsApplication1\WindowsApplication1\obj\Debug\Refactor\
     目录           0  2009-04-27 15:10  WindowsApplication1\WindowsApplication1\obj\Debug\TempPE\
     文件         842  2003-10-26 15:57  WindowsApplication1\WindowsApplication1\obj\Debug\WindowsApplication1.csproj.GenerateResource.Cache
     文件       57344  2009-04-26 12:51  WindowsApplication1\WindowsApplication1\obj\Debug\WindowsApplication1.exe
     文件         180  2009-04-26 12:51  WindowsApplication1\WindowsApplication1\obj\Debug\WindowsApplication1.Form1.resources
     文件       87552  2009-04-26 12:51  WindowsApplication1\WindowsApplication1\obj\Debug\WindowsApplication1.pdb
     文件         180  2009-03-16 04:04  WindowsApplication1\WindowsApplication1\obj\Debug\WindowsApplication1.Properties.Resources.resources
     文件         842  2009-04-26 12:51  WindowsApplication1\WindowsApplication1\obj\Debug\表达式计算器.csproj.GenerateResource.Cache
     文件         352  2003-10-26 16:01  WindowsApplication1\WindowsApplication1\obj\WindowsApplication1.csproj.FileList.txt
     文件         351  2009-04-26 12:51  WindowsApplication1\WindowsApplication1\obj\表达式计算器.csproj.FileList.txt
     文件         478  2003-10-26 14:43  WindowsApplication1\WindowsApplication1\Program.cs
     目录           0  2009-04-27 15:10  WindowsApplication1\WindowsApplication1\Properties\
     文件        1210  2003-10-26 14:43  WindowsApplication1\WindowsApplication1\Properties\AssemblyInfo.cs
     文件        2892  2003-10-26 14:43  WindowsApplication1\WindowsApplication1\Properties\Resources.Designer.cs
     文件        5612  2003-10-26 14:43  WindowsApplication1\WindowsApplication1\Properties\Resources.resx
     文件        1102  2003-10-26 14:43  WindowsApplication1\WindowsApplication1\Properties\Settings.Designer.cs
     文件         249  2003-10-26 14:43  WindowsApplication1\WindowsApplication1\Properties\Settings.settings
     文件        3245  2003-10-26 15:26  WindowsApplication1\WindowsApplication1\WindowsApplication1.csproj
............此处省略1个文件信息