C编写可以开根和幂运算计算器的详细过程

1、首先,面板布局如下:控件命名规律为:1:bt1, 2:bt2 .以此类推,从程序中可以很容易看出来.下面就是详细的程序代码using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;namespace 科学计算器 public partial class Form1 : Form public Form1(

2、) InitializeComponent(); txt_result.Text += ;/默认打开计算器时屏幕显示空格 #region 数字按键的屏幕显示 private void bt1_Click(object sender, EventArgs e) /if (float.Parse(txt_result.Text) =0)/判断是否已经输入了数字 / txt_result.Text = 1; /如果已经输入，并且不是0，则加1 /else txt_result.Text += 1; private void bt2_Click(object sender, EventArgs e)

3、/if (float.Parse(txt_result.Text) != 0)/判断是否已经输入了数字 / txt_result.Text += 2;/如果已经输入，并且不是0，则加2 /else txt_result.Text += 2; private void bt3_Click(object sender, EventArgs e) /if (float.Parse(txt_result.Text) != 0)/判断是否已经输入了数字 / txt_result.Text += 3;/如果已经输入，并且不是0，则加3 /else txt_result.Text += 3; private

4、 void bt4_Click(object sender, EventArgs e) /if (float.Parse(txt_result.Text) != 0)/判断是否已经输入了数字 / txt_result.Text += 4;/如果已经输入，并且不是0，则加4 /else txt_result.Text += 4; private void bt5_Click(object sender, EventArgs e) /if (float.Parse(txt_result.Text) != 0)/判断是否已经输入了数字 / txt_result.Text += 5;/如果已经输入，并

5、且不是0，则加5 /else txt_result.Text += 5; private void bt6_Click(object sender, EventArgs e) /if (float.Parse(txt_result.Text) != 0)/判断是否已经输入了数字 / txt_result.Text += 6;/如果已经输入，并且不是0，则加6 /else txt_result.Text += 6; private void bt7_Click(object sender, EventArgs e) /if (float.Parse(txt_result.Text) != 0)/

6、判断是否已经输入了数字 / txt_result.Text += 7;/如果已经输入，并且不是0，则加7 /else txt_result.Text += 7; private void bt8_Click(object sender, EventArgs e) /if (float.Parse(txt_result.Text) != 0)/判断是否已经输入了数字 / txt_result.Text += 8;/如果已经输入，并且不是0，则加8 /else txt_result.Text += 8; private void bt9_Click(object sender, EventArgs

7、 e) /if (float.Parse(txt_result.Text) != 0)/判断是否已经输入了数字 / txt_result.Text += 9;/如果已经输入，并且不是0，则加9 /else txt_result.Text += 9; private void bt0_Click(object sender, EventArgs e) /if (float.Parse(txt_result.Text) != 0)/判断是否已经输入了数字 / txt_result.Text += 0;/如果已经输入，并且不是0，则加0 /else txt_result.Text += 0; /上述

8、判断是否输入数字的方法在小数点以及运算符处还没有实现,先用别的方法代替一下 private void btpoint_Click(object sender, EventArgs e)/小数点 txt_result.Text += .; private void btc_Click(object sender, EventArgs e)/C键的功能实现 txt_result.Text = ; private void bttuige_Click(object sender, EventArgs e)/退格的功能实现 if (txt_result.Text != ) txt_result.Tex

9、t = txt_result.Text.Substring(0, txt_result.Text.Length - 1); private void btadd_Click(object sender, EventArgs e) txt_result.Text += +; private void btsub_Click(object sender, EventArgs e) txt_result.Text += -; private void btpro_Click(object sender, EventArgs e) txt_result.Text += *; private void

10、btdiv_Click(object sender, EventArgs e) txt_result.Text += /; private void btinv_Click(object sender, EventArgs e) txt_result.Text += ; private void btevo_Click(object sender, EventArgs e) txt_result.Text += ; private void btzuo_Click(object sender, EventArgs e) txt_result.Text += (; private void bt

11、you_Click(object sender, EventArgs e) txt_result.Text += ); #endregion #region =计算功能实现 private void btequ_Click(object sender, EventArgs e) string str = txt_result.Text; List lists = new List(); string temp = ; int index = 0, sum = str.Length; foreach (char c in str) /循环遍历计算式的每个字符，并逐一识别 index+; if (

12、c != + & c != - & c != * & c != / & c != ( & c != ) & c != & c != ) temp += c; else if (temp != ) lists.Add(temp); lists.Add(c.ToString(); temp = ; if (index = sum & temp != ) lists.Add(temp); /开始运算 try #region 遍历表达式是否存在括号 index = 0; for (int i = 0; i 0 & listsi - 1 != ) & listsi = ) /首先进行幂运算 listsi

13、 + 1 = Make(i - 1, listsi - 1, listsi + 1, listsi).ToString(); lists.RemoveAt(i - 1); lists.RemoveAt(i - 1); i -= 1; if (listsi = ) /表达式中有括号的情况 for (int j = i; j = 0; j-) if (listsj = ()/j i 分别为左右括号的位置 index = j + 1; do string type1 = listsindex + 1;/遍历找符号,列表顺序 if (type1 = + | type1 = -) if (i - j =

14、 5) if (listsindex + 2 = ) listsindex + 2 = kaigen(Int32.Parse(listsindex + 3).ToString(); lists.RemoveAt(index + 3); i -= 1; else listsindex + 2 = Make(index, listsindex, listsindex + 2, type1).ToString(); lists.RemoveAt(index); lists.RemoveAt(index); i -= 2; /定义一级运算 else string type2 = listsindex

15、+ 3; string type3 = listsindex + 4; if (type3 = )/定义三级运算 开根 listsindex + 4 = kaigen(Int32.Parse(listsindex + 5).ToString(); lists.RemoveAt(index + 5); i -= 1; else if (type2 = * | type2 = / | type2 = )/定义二级运算 listsindex + 2 = Make(index + 2, listsindex + 2, listsindex + 4, type2).ToString(); lists.R

16、emoveAt(index + 3); lists.RemoveAt(index + 3); i -= 2; else listsindex + 2 = Make(index, listsindex, listsindex + 2, type1).ToString(); lists.RemoveAt(index); lists.RemoveAt(index); i -= 2; else listsindex + 2 = Make(index, listsindex, listsindex + 2, type1).ToString(); lists.RemoveAt(index); lists.

17、RemoveAt(index); i -= 2; if (i - j = 2) lists.RemoveAt(j); lists.RemoveAt(j + 1); i -= 2; break; /跳出while循环 while (1 = 1); break; /跳出for(j)循环 #endregion #region 表达式中没括号的情况 index = 0; do if (lists.Count = 1) txt_result.Text += = + lists0; break; string type1 = listsindex + 1; if (type1 = + | type1 =

18、-) if (lists.Count = 4) if (listsindex + 2 = ) listsindex + 2 = kaigen(Int32.Parse(listsindex + 3).ToString(); lists.RemoveAt(index + 3); else listsindex + 2 = Make(index, listsindex, listsindex + 2, type1).ToString(); lists.RemoveAt(index); lists.RemoveAt(index); else string type2 = listsindex + 3;

19、 if (type2 = * | type2 = / | type2 = ) listsindex + 2 = Make(index + 2, listsindex + 2, listsindex + 4, type2).ToString(); lists.RemoveAt(index + 3); lists.RemoveAt(index + 3); else listsindex + 2 = Make(index, listsindex, listsindex + 2, type1).ToString(); lists.RemoveAt(index); lists.RemoveAt(inde

20、x); else listsindex + 2 = Make(index, listsindex, listsindex + 2, type1).ToString(); lists.RemoveAt(index); lists.RemoveAt(index); if (lists.Count = 1) txt_result.Text += = + lists0; break; while (1 = 1); #endregion catch (Exception ex) MessageBox.Show(请输入正确的运算表达式 + ex.Message, 错误, MessageBoxButtons.OK, MessageBoxIcon.Error); #endregion #region make定义 private object Make(int index, string noStr1, string noStr2, string type) double tempSum = 0, no1 =