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可以实现加减乘除运算
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 WindowsFormsApplication1
{
public partial class 计算器 : Form
{
public 计算器()
{
InitializeComponent();
}
int tab = 0;
//记录指针
int Precord = 0;
//记录数
int RecordNum = 0;
public String text="";
//存储记录
public String[] record=new String[10];
//存储表达式
public String[] texts=new String[10000];
//加载js引擎
Microsoft.JScript.Vsa.VsaEngine ve = Microsoft.JScript.Vsa.VsaEngine.CreateEngine();
//处理表达式
public void addComments(String s)
{
this.text = s;
this.texts[tab] = s;
this.richTextBox1.Text = this.text;
tab ;
}
//0按钮的触发事件
private void button10_Click(object sender, EventArgs e)
{
this.addComments("0");
}
//小数点.按钮的触发事件
private void button12_Click(object sender, EventArgs e)
{
this.addComments(".");
}
//1按钮的触发事件
private void button1_Click(object sender, EventArgs e)
{
this.addComments("1");
}
//2按钮的触发事件
private void button2_Click(object sender, EventArgs e)
{
this.addComments("2");
}
//3按钮的触发事件
private void button3_Click(object sender, EventArgs e)
{
this.addComments("3"); ;
}
//4按钮的触发事件
private void button4_Click(object sender, EventArgs e)
{
this.addComments("4");
}
//5按钮的触发事件
private void button5_Click(object sender, EventArgs e)
{
this.addComments("5");
}
//6按钮的触发事件
private void button6_Click(object sender, EventArgs e)
{
this.addComments("6");
}
//7按钮的触发事件
private void button7_Click(object sender, EventArgs e)
{
this.addComments("7");
}
//8按钮的触发事件
private void button8_Click(object sender, EventArgs e)
{
this.addComments("8");
}
//9按钮的触发事件
private void button9_Click(object sender, EventArgs e)
{
this.addComments("9");
}
//（按钮的触发事件
private void button18_Click(object sender, EventArgs e)
{
this.addComments("(");
}
//）按钮的触发事件
private void button17_Click(object sender, EventArgs e)
{
this.addComments(")");
}
// 按钮的触发事件
private void button13_Click(object sender, EventArgs e)
{
this.addComments(" ");
}
//-按钮的触发事件
private void button14_Click(object sender, EventArgs e)
{
this.addComments("-");
}
//*按钮的触发事件
private void button15_Click(object sender, EventArgs e)
{
this.addComments("*");
}
//按钮/的触发事件
private void button16_Click(object sender, EventArgs e)
{
this.addComments("/");
}
/// <summary>
/// =按钮的触发事件,最终计算结果并显示
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button11_Click(object sender, EventArgs e)
{
try
{
//就是结果
String result = Microsoft.JScript.Eval.JScriptEvaluate(this.text, ve).ToString();
this.richTextBox1.Text = result;
this.record[RecordNum] = this.text;
this.text =result;
this.RecordNum ;
this.Precord = this.RecordNum;
}
catch(Exception){
this.richTextBox1.Text = "输入错误！";
this.text = "";
tab = 0;
}
}
//清屏按钮的触发事件
private void button20_Click(object sender, EventArgs e)
{
this.text = "";
this.richTextBox1.Text = this.text;
}
//退格按钮的触发事件
private void button19_Click(object sender, EventArgs e)
{
if(tab>0){
tab -= 1;
}
this.text = "";
for (int i = 0; i < tab;i )
{
this.text = this.texts[i];
}
this.richTextBox1.Text = this.text;
}
//<-按钮的触发事件
private void button21_Click(object sender, EventArgs e)
{
Precord--;
if ( Precord< 0)
{
Precord = RecordNum;
}
// this.text = this.record[Precord];
this.richTextBox1.Text=this.record[Precord];
}
//->按钮的触发事件
private void button22_Click(object sender, EventArgs e)
{
Precord ;
if(Precord>RecordNum){
Precord = 0;
}
// this.text = this.record[Precord];
this.richTextBox1.Text = this.record[Precord];
}
}
}