以下是我用c#写的一个图形化的计算器，这是关键代码
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Collections;
namespace Calculator
{
public partial class CalCulator : Form
{
private enum OptrNum //枚举类型定义，方便比较运算符的大小
{
LessThan, //小于
Equal, //等于
GreaterThan, //大于
Error //错误
};
private string temp_textBoxView; //数据存储区
private CalCulatorStack OptrStack; //运算符栈
private CalCulatorStack NumStack; //运算数栈
private ArrayList temp_List; //分离数据临时变量存储区
private string StrOptr = "+-*/()#"; //计算支持的运算符
private int[,] OptrReation = new int[7, 7]{ //存储操作数关系
{1,1,-1,-1,-1,1,1}, // +
{1,1,-1,-1,-1,1,1}, // -
{1,1,1,1,-1,1,1}, // *
{1,1,1,1,-1,1,1}, // /
{-1,-1,-1,-1,-1,0,2}, // (
{1,1,1,1,2,1,1}, // )
{-1,-1,-1,-1,-1,2,0}}; // #
public CalCulator()
{
this.StartPosition = FormStartPosition.CenterScreen;
OptrStack = new CalCulatorStack();
NumStack = new CalCulatorStack();
temp_List = new ArrayList();
InitializeComponent();
temp_textBoxView = string.Empty;
}
/// <summary>
/// ButtonOne点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ButtonOneClick(object sender, EventArgs e)
{
textBoxView.Text = string.Empty;
temp_textBoxView += "1";
textBoxView.Text = temp_textBoxView;
}
/// <summary>
/// ButtonTwo点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ButtonTwoClick(object sender, EventArgs e)
{
textBoxView.Text = string.Empty;
temp_textBoxView += "2";
textBoxView.Text = temp_textBoxView;
}
/// <summary>
/// ButtonThree点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ButtonThreeClick(object sender, EventArgs e)
{
textBoxView.Text = string.Empty;
temp_textBoxView += "3";
textBoxView.Text = temp_textBoxView;
}
/// <summary>
/// ButtonFour点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ButtonFourClick(object sender, EventArgs e)
{
textBoxView.Text = string.Empty;
temp_textBoxView += "4";
textBoxView.Text = temp_textBoxView;
}
/// <summary>
/// ButtonFive点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ButtonFiveClick(object sender, EventArgs e)
{
textBoxView.Text = string.Empty;
temp_textBoxView += "5";
textBoxView.Text = temp_textBoxView;
}
/// <summary>
/// ButtonSix点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ButtonSixClick(object sender, EventArgs e)
{
textBoxView.Text = string.Empty;
temp_textBoxView += "6";
textBoxView.Text = temp_textBoxView;
}
/// <summary>
/// ButtonSeven点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ButtonSevenClick(object sender, EventArgs e)
{
textBoxView.Text = string.Empty;
temp_textBoxView += "7";
textBoxView.Text = temp_textBoxView;
}
/// <summary>
/// ButtonEight点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ButtonEightClick(object sender, EventArgs e)
{
textBoxView.Text = string.Empty;
temp_textBoxView += "8";
textBoxView.Text = temp_textBoxView;
}
/// <summary>
/// ButtonNine点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ButtonNineClick(object sender, EventArgs e)
{
textBoxView.Text = string.Empty;
temp_textBoxView += "9";
textBoxView.Text = temp_textBoxView;
}
/// <summary>
/// ButtonZero点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ButtonZeroClick(object sender, EventArgs e)
{
textBoxView.Text = string.Empty;
temp_textBoxView += "0";
textBoxView.Text = temp_textBoxView;
}
/// <summary>
/// PriorBracketButton点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void PriorBracketButtonClick(object sender, EventArgs e)
{
textBoxView.Text = string.Empty;
temp_textBoxView += "(";
textBoxView.Text = temp_textBoxView;
}
/// <summary>
/// NextBracketButton点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void NextBracketButtonClick(object sender, EventArgs e)
{
textBoxView.Text = string.Empty;
temp_textBoxView += ")";
textBoxView.Text = temp_textBoxView;
}
/// <summary>
/// 加号点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void AddButtonClick(object sender,EventArgs e)
{
textBoxView.Text = string.Empty;
temp_textBoxView += "+";
textBoxView.Text = temp_textBoxView;
}
/// <summary>
/// 减号点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void SubButtonClick(object sender, EventArgs e)
{
textBoxView.Text = string.Empty;
temp_textBoxView += "-";
textBoxView.Text = temp_textBoxView;
}
/// <summary>
/// 乘号点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void MulButtonClick(object sender, EventArgs e)
{
textBoxView.Text = string.Empty;
temp_textBoxView += "*";
textBoxView.Text = temp_textBoxView;
}
/// <summary>
/// 除号点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void DivButtonClick(object sender, EventArgs e)
{
textBoxView.Text = string.Empty;
temp_textBoxView += "/";
textBoxView.Text = temp_textBoxView;
}
/// <summary>
/// 清除点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ClrButtonClick(object sender,EventArgs e)
{
textBoxView.Text = string.Empty;
temp_textBoxView = string.Empty;
}
/// <summary>
/// 退格点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void DelButtonClick(object sender,EventArgs e)
{
if (temp_textBoxView == string.Empty)
return;
else
{
string temp;
temp = temp_textBoxView.Substring(0, temp_textBoxView.Length - 1);
temp_textBoxView = temp;
textBoxView.Text = temp_textBoxView;
}
}
/// <summary>
/// 求值事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void EuqButtonClick(object sender, EventArgs e)
{
if (temp_textBoxView == string.Empty)
return;
else
{
InitTempList();
OptrStack.Push(temp_List[0]);
temp_List.RemoveAt(0);
object temp;
temp = temp_List[0];
temp_List.RemoveAt(0);
while (Convert.ToChar(Convert.ToInt32(temp)) != '#' || Convert.ToChar(OptrStack.GetTop()) != '#')
{
if (IsOptr(Convert.ToChar(Convert.ToInt32(temp))) == false)
{
NumStack.Push(Convert.ToDouble(temp));
temp = temp_List[0];
temp_List.RemoveAt(0);
}
else
{
switch (Precede(Convert.ToChar(OptrStack.GetTop()), Convert.ToChar(temp)))
{
case OptrNum.LessThan:
OptrStack.Push(Convert.ToChar(temp));
temp = temp_List[0];
temp_List.RemoveAt(0);
break;
case OptrNum.Equal:
OptrStack.Pop();
temp = temp_List[0];
temp_List.RemoveAt(0);
break;
case OptrNum.GreaterThan:
char temp_optr;
double a, b,c;
temp_optr = Convert.ToChar(OptrStack.Pop());
b = Convert.ToDouble(NumStack.Pop());
a = Convert.ToDouble((NumStack.Pop()));
c = Operate(a, temp_optr, b);
NumStack.Push(c);
break;
case OptrNum.Error:
MessageBox.Show(this, "运算错误，请检查输入是否正确!");
break;
}
}
}
textBoxView.Text = Convert.ToString(NumStack.Pop());
temp_textBoxView = string.Empty;
temp_List.Clear();
OptrStack.Clear();
NumStack.Clear();
}
}
/// <summary>
/// 加载事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void FrmLoad(object sender, EventArgs e)
{
buttonOne.Click += new EventHandler(ButtonOneClick);
buttonTwo.Click += new EventHandler(ButtonTwoClick);
buttonThree.Click += new EventHandler(ButtonThreeClick);
buttonFour.Click += new EventHandler(ButtonFourClick);
buttonFive.Click += new EventHandler(ButtonFiveClick);
buttonSix.Click += new EventHandler(ButtonSixClick);
buttonSeven.Click += new EventHandler(ButtonSevenClick);
buttonEight.Click += new EventHandler(ButtonEightClick);
buttonNine.Click += new EventHandler(ButtonNineClick);
buttonZero.Click += new EventHandler(ButtonZeroClick);
PriorBracketButton.Click += new EventHandler(PriorBracketButtonClick);
NextBracketButton.Click += new EventHandler(NextBracketButtonClick);
AddButton.Click += new EventHandler(AddButtonClick);
SubButton.Click += new EventHandler(SubButtonClick);
MulButton.Click += new EventHandler(MulButtonClick);
DivButton.Click += new EventHandler(DivButtonClick);
ClrButton.Click += new EventHandler(ClrButtonClick);
DelButton.Click += new EventHandler(DelButtonClick);
EuqButton.Click += new EventHandler(EuqButtonClick);
}
/// <summary>
/// 分离数据存储区的运算数与运算符,
/// 并将其插入到temp_list等待下一步计算
/// </summary>
private void InitTempList()
{
temp_textBoxView += "#";
char[] Temp = temp_textBoxView.ToCharArray();
double Num = 0, COUNT = 10;
int i;
temp_List.Add('#');
for (i = 0; i < Temp.Length; i++)
{
if (IsOptr(Temp[i]) == true)
{
if (Num != 0)
{
temp_List.Add(Num);
Num = 0;
}
temp_List.Add(Temp[i]);
}
else
{
Num = ConvertToInt32(Temp[i]) + Num * COUNT;
}
}
}
/// <summary>
/// 判断元素是否为操作符
/// </summary>
/// <param name="temp"></param>
/// <returns></returns>
private bool IsOptr(char temp)
{
if (temp == '+' || temp == '-' || temp == '*' || temp == '/' ||
temp == '(' || temp == ')'||temp=='#')
return true;
else
return false;
}
/// <summary>
/// 比较两个运算符的大小
/// </summary>
/// <param name="prior_Optr"></param>
/// <param name="next_Optr"></param>
/// <returns></returns>
private OptrNum Precede(char prior_Optr,char next_Optr)
{
OptrNum optr_num=OptrNum.Error;
int i = StrOptr.IndexOf(prior_Optr);
int j = StrOptr.IndexOf(next_Optr);
if (OptrReation[i, j] == 1)
optr_num = OptrNum.GreaterThan;
if (OptrReation[i, j] == -1)
optr_num = OptrNum.LessThan;
if (OptrReation[i, j] == 0)
optr_num = OptrNum.Equal;
if (OptrReation[i, j] == 2)
optr_num = OptrNum.Error;
return optr_num;
}
/// <summary>
/// 运算函数
/// </summary>
/// <param name="a"></param>
/// <param name="Optr"></param>
/// <param name="b"></param>
private double Operate(double a,char Optr,double b)
{
if (Optr == '+')
return a + b;
if (Optr == '-')
return a - b;
if (Optr == '*')
return a * b;
if (Optr == '/')
return a / b;
else
return 0;
}
/// <summary>
/// 将字符转换为数字
/// </summary>
/// <param name="temp"></param>
/// <returns></returns>
private int ConvertToInt32(char temp)
{
if (temp == '0')
return 0;
if (temp == '1')
return 1;
if (temp == '2')
return 2;
if (temp == '3')
return 3;
if (temp == '4')
return 4;
if (temp == '5')
return 5;
if (temp == '6')
return 6;
if (temp == '7')
return 7;
if (temp == '8')
return 8;
if (temp == '9')
return 9;
else
return 0;
}
}
}