计算器编程代码

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计算器,编程,代码

using using using using using using using using

System;

System.Collections.Generic; System.ComponentModel; System.Data; System.Drawing; System.Linq; System.Text;

System.Windows.Forms; namespace calculator {

public partial class Form1 : Form { public Form1()

InitializeComponent();

private void Form1_Load( object sender, EventArgs e) private void btn_Add_Click( object sender, EventArgs e)

Button btn = ( Button )sender;

// 空格用来分隔数值和运算符 txt_Result.Text = txt_Result.Text +

" " + btn .Text + " "

private void btn_Result_Click( object sender, EventArgs e)

// 保存计算结果 double d_result;

// 保存文本框中的算术表达式 string s_txt = txt_Result.Text; // 查找空格位置 int space = s_txt.IndexOf(

' ' );

//s1 保存第一个运算数 string s1 = s_txt.Substring( 0, space ); //operation 用

来保存运算数

char opoperation = Convert .ToChar(s_txt.Substring((space + 1), 1)); //s2 保存第二

个运算数

string s2 = s_txt.Substring(space + 3);

// 将运算数从 string 转成 Double 型 double arg1 = Convert .ToDouble(s1); double arg2 = Convert .ToDouble(s2);

// 根据运算符进行计算 switch (opoperation )

case '+' : d_result = arg1 + arg2; break ; case '-' : d_result = arg1 - arg2;

break;

case '*':

d_result = arg1 * arg2; break;

case 7'

if (arg2 == 0)

II抛出异常

throw new ApplicationException

();

else

d_result = arg1 / arg2;

break; default :

throw new ApplicationException

()

；

//将计算结果显示在文本框中 txt_Result.Text = d_result.ToString();

private void btn_Clear_Click( object sender, EventArgs e)

//将文本清空

txt Result.Text = HH

private void button0_Click( object sender, EventArgs e)

Button btn = ( Button

)sender; txt_Result.Text += btn.Text;

private void but1_Click( object sender, EventArgs e)

Button btn = ( Button )sender;

II空格用来分隔数值和运算符 txt Result.Text = txt Result.Text + ""+ btn.Text +

private void but2_Click( object sender, EventArgs e)

Button btn = ( Button )sender; II空格用来分隔数值和运算符 txt Result.Text = txt Result.Text + ""+ btn.Text +

private void but3_Click( object sender, EventArgs e)

Button btn = ( Button )sender;

II空格用来分隔数值和运算符

txt Result.Text = txt Result.Text + ""+ btn.Text +

private

void button1_Click( object sender, EventArgs e)

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Button btn = ( Button )sender; txt_Result.Text += btn.Text;

private

void button2_Click( object sender, EventArgs Button btn = ( Button )sender; txt_Result.Text += btn.Text;

private

void button3_Click( object sender, EventArgs Button btn = ( Button )sender; txt_Result.Text += btn.Text;

private

void button4_Click( object sender, EventArgs Button btn = ( Button )sender; txt_Result.Text += btn.Text;

private

void button5_Click( object sender, EventArgs Button btn = ( Button )sender; txt_Result.Text += btn.Text;

private

void button6_Click( object sender, EventArgs Button btn = ( Button )sender; txt_Result.Text += btn.Text;

private

void button7_Click( object sender, EventArgs Button btn = ( Button )sender; txt_Result.Text += btn.Text;

private

void button8_Click( object sender, EventArgs Button btn = ( Button )sender; txt_Result.Text += btn.Text;

private

void button9_Click( object

sender,

EventArgs

Button btn = ( Button )sender; txt_Result.Text += btn.Text;

private void lbl_Result_Click( object sender, EventArgs e)

Private

void txt_Result_TextChanged( object sender, EventArgs e)

e)

e)

e)

e)

e)

e)

e)

e)

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{

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