Form1 (2.8).cs

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using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Drawing.Drawing2D;
using System.Drawing;
using System.Data;
//细节。。。
//1.数字之后直接接括号默认为乘法，括号之后直接接数字，默认为乘法
//2.输入一个运算符（+ - * /）后不能接着继续输入运算符，若已有运算符，不相同则替换，‘（’后不能直接跟运算符。刚开始不能输入运算符。
//v4.0
//更改了方向键
//添加了根号运算
//修正一些bug
//V5.0
//取消括号的输入限制
//增加了cos sin tan运算
//运算式和输出结果分行表示
//增加了减法的负号功能
//增加了三次根
//待补充。。

namespace Simple_calculate
{
    /*struct inform
    {
        inform(int a)
        {
            leftbracket = a;
            rightbracket = a;
        }
        public int leftbracket;
        public int rightbracket;
    }*/
    public partial class Form1 : Form
    {
        private double preAnswer;                        //前一个答案
        bool error=false;                                //判是否错误
        int errorinfoLen = 0;
        bool[] CanOperation = new bool[50];
        //inform[] infarr = new inform[50];              //储存每行的括号信息
        int[] pos = new int[50];
        bool ALT = false;                                //ALT
        bool CubeRoot = false;
        char[] op = { '+', '-', '*', '/', '(', ')', '√', 'c', 's', 't','C','S','T','^', '=' };

        char[,] priority = 
        // +   -   *   /   (   )  √   c   s   t   C   S   T   ^   =
        {{'>','>','<','<','<','>','<','<','<','<','<','<','<','<','>'},    //+
         {'>','>','<','<','<','>','<','<','<','<','<','<','<','<','>'},    //-
         {'>','>','>','>','<','>','<','<','<','<','<','<','<','<','>'},    //*
         {'>','>','>','>','<','>','<','<','<','<','<','<','<','<','>'},    ///
         {'<','<','<','<','<','=','<','<','<','<','<','<','<','<','='},    //(
         {'>','>','>','>','>','0','>','>','>','>','>','>','>','>','>'},    //)
         {'>','>','>','>','<','>','<','<','<','<','<','<','<','<','>'},    //√
         {'>','>','>','>','<','>','<','<','<','<','<','<','<','<','>'},    //c
         {'>','>','>','>','<','>','<','<','<','<','<','<','<','<','>'},    //s
         {'>','>','>','>','<','>','<','<','<','<','<','<','<','<','>'},    //t
         {'>','>','>','>','<','>','<','<','<','<','<','<','<','<','>'},    //C
         {'>','>','>','>','<','>','<','<','<','<','<','<','<','<','>'},    //S
         {'>','>','>','>','<','>','<','<','<','<','<','<','<','<','>'},    //T