实例介绍
【实例简介】
【实例截图】
【核心代码】
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 Calcu
{
public partial class Form1 : Form
{
private double _num1 = 0, _num2 = 0, _result = 0; //第一个运算数，第二个运算数，结果
private string _operator = ""; //运算符号
private int _operatorCount = 0; //运算符数量
private bool _firstNumFlag = false; //首数字标志位
private int radix = 10;
Button[] btns;
public Form1()
{
InitializeComponent();
btns = new Button[]{
button0,button1,
button2,button3,button4,button5,button6,button7,
button8,button9
};
}
//数字按钮的click响应方法
private void button0_Click(object sender, EventArgs e)
{
if (_operator == "=")//如果前一运算符为等号且编辑框不空则清空编辑框
{
textBoxResult.Text = ""; _operator = ",";
}
if (_firstNumFlag == true) //判断是否为首数字，是则替换，否则追加
{
textBoxResult.Text = "0";
_firstNumFlag = false;
}
else
textBoxResult.Text = textBoxResult.Text "0";
textBoxResult.Focus(); //使焦点落到编辑框中
textBoxResult.Select(textBoxResult.Text.Length, 0);//使光标落在编辑框最后面
}
private void button1_Click(object sender, EventArgs e)
{
if (_operator == "=")//如果前一运算符为等号且编辑框不空则清空编辑框
{
textBoxResult.Text = ""; _operator = ",";
}
if (_firstNumFlag == true)
{
textBoxResult.Text = "1";
_firstNumFlag = false;
}
else
textBoxResult.Text = textBoxResult.Text "1";
textBoxResult.Focus(); //使焦点落到编辑框中
textBoxResult.Select(textBoxResult.Text.Length, 0);//使光标落在编辑框最后面
}
private void button2_Click(object sender, EventArgs e)
{
if (_operator == "=")//如果前一运算符为等号且编辑框不空则清空编辑框
{
textBoxResult.Text = ""; _operator = ",";
}
if (_firstNumFlag == true)
{
textBoxResult.Text = "2";
_firstNumFlag = false;
}
else
textBoxResult.Text = textBoxResult.Text "2";
textBoxResult.Focus(); //使焦点落到编辑框中
textBoxResult.Select(textBoxResult.Text.Length, 0);//使光标落在编辑框最后面
}
private void button3_Click(object sender, EventArgs e)
{
if (_operator == "=")//如果前一运算符为等号且编辑框不空则清空编辑框
{
textBoxResult.Text = ""; _operator = ",";
}
if (_firstNumFlag == true)
{
textBoxResult.Text = "3";
_firstNumFlag = false;
}
else
textBoxResult.Text = textBoxResult.Text "3";
textBoxResult.Focus(); //使焦点落到编辑框中
textBoxResult.Select(textBoxResult.Text.Length, 0);//使光标落在编辑框最后面
}
private void button4_Click(object sender, EventArgs e)
{
if (_operator == "=")//如果前一运算符为等号且编辑框不空则清空编辑框
{
textBoxResult.Text = ""; _operator = ",";
}
if (_firstNumFlag == true)
{
textBoxResult.Text = "4";
_firstNumFlag = false;
}
else
textBoxResult.Text = textBoxResult.Text "4";
textBoxResult.Focus(); //使焦点落到编辑框中
textBoxResult.Select(textBoxResult.Text.Length, 0);//使光标落在编辑框最后面
}
private void button5_Click(object sender, EventArgs e)
{
if (_operator == "=")//如果前一运算符为等号且编辑框不空则清空编辑框
{
textBoxResult.Text = ""; _operator = ",";
}
if (_firstNumFlag == true)
{
textBoxResult.Text = "5";
_firstNumFlag = false;
}
else
textBoxResult.Text = textBoxResult.Text "5";
textBoxResult.Focus(); //使焦点落到编辑框中
textBoxResult.Select(textBoxResult.Text.Length, 0);//使光标落在编辑框最后面
}
private void button6_Click(object sender, EventArgs e)
{
if (_operator == "=")//如果前一运算符为等号且编辑框不空则清空编辑框
{
textBoxResult.Text = ""; _operator = ",";
}
if (_firstNumFlag == true)
{
textBoxResult.Text = "6";
_firstNumFlag = false;
}
else
textBoxResult.Text = textBoxResult.Text "6";
textBoxResult.Focus(); //使焦点落到编辑框中
textBoxResult.Select(textBoxResult.Text.Length, 0);//使光标落在编辑框最后面
}
private void button7_Click(object sender, EventArgs e)
{
if (_operator == "=")//如果前一运算符为等号且编辑框不空则清空编辑框
{
textBoxResult.Text = ""; _operator = ",";
}
if (_firstNumFlag == true)
{
textBoxResult.Text = "7";
_firstNumFlag = false;
}
else
textBoxResult.Text = textBoxResult.Text "7";
textBoxResult.Focus(); //使焦点落到编辑框中
textBoxResult.Select(textBoxResult.Text.Length, 0);//使光标落在编辑框最后面
}
private void button8_Click(object sender, EventArgs e)
{
if (_operator == "=")//如果前一运算符为等号且编辑框不空则清空编辑框
{
textBoxResult.Text = ""; _operator = ",";
}
if (_firstNumFlag == true)
{
textBoxResult.Text = "8";
_firstNumFlag = false;
}
else
textBoxResult.Text = textBoxResult.Text "8";
textBoxResult.Focus(); //使焦点落到编辑框中
textBoxResult.Select(textBoxResult.Text.Length, 0);//使光标落在编辑框最后面
}
private void button9_Click(object sender, EventArgs e)
{
if (_operator == "=")//如果前一运算符为等号且编辑框不空则清空编辑框
{
textBoxResult.Text = ""; _operator = ",";
}
if (_firstNumFlag == true)
{
textBoxResult.Text = "9";
_firstNumFlag = false;
}
else
textBoxResult.Text = textBoxResult.Text "9";
textBoxResult.Focus(); //使焦点落到编辑框中
textBoxResult.Select(textBoxResult.Text.Length, 0);//使光标落在编辑框最后面
}
private void buttonDot_Click(object sender, EventArgs e)
{
if (_operator == "=")//如果前一运算符为等号且编辑框不空则清空编辑框
{
textBoxResult.Text = ""; _operator = ",";
}
if (_firstNumFlag == true)
{
textBoxResult.Text = ".";
_firstNumFlag = false;
}
else
{
if (textBoxResult.Text.IndexOf('.') == -1)
textBoxResult.Text = textBoxResult.Text ".";
}
textBoxResult.Focus(); //使焦点落到编辑框中
textBoxResult.Select(textBoxResult.Text.Length, 0);//使光标落在编辑框最后面
}
// .-.*./的响应方法
private void buttonAdd_Click(object sender, EventArgs e)
{
_firstNumFlag = true;
_operatorCount = _operatorCount 1;
if (_operatorCount == 1) //判断是否为第一个运算符
{
if (radix == 10)
{
_num1 = Convert.ToDouble(textBoxResult.Text); //保存第一个运算数
}
else
{
_num1 = Convert.ToInt32(textBoxResult.Text, radix);
}
_operator = " "; //保存符号
textBoxResult.Text = ""; //清空
}
else
{
if (radix == 10)
{
_num2 = Convert.ToDouble(textBoxResult.Text);
}
else
{
_num2 = Convert.ToInt32(textBoxResult.Text, radix);
}
if (_operator == " ")
_num1 = _num1 _num2;
else if (_operator == "-")
_num1 = _num1 - _num2;
else if (_operator == "*")
_num1 = _num1 * _num2;
else if (_operator == "/")
_num1 = _num1 / _num2;
_operator = " ";
int q = radix;
string s = Convert.ToString((int)_num1, q);
textBoxResult.Text = s;
}
textBoxResult.Focus(); //使焦点落到编辑框中
textBoxResult.Select(textBoxResult.Text.Length, 0);//使光标落在编辑框最后面
}
private void buttonSub_Click(object sender, EventArgs e)
{
_firstNumFlag = true;
_operatorCount = _operatorCount 1;
if (_operatorCount == 1) //判断是否为第一个运算符
{
if (radix == 10)
{
_num1 = Convert.ToDouble(textBoxResult.Text); //保存第一个运算数
}
else
{
_num1 = Convert.ToInt32(textBoxResult.Text, radix);
}
_operator = "-"; //保存符号
textBoxResult.Text = ""; //清空
}
else
{
if (radix == 10)
{
_num2 = Convert.ToDouble(textBoxResult.Text);
}
else
{
_num2 = Convert.ToInt32(textBoxResult.Text, radix);
}
if (_operator == " ")
_num1 = _num1 _num2;
else if (_operator == "-")
_num1 = _num1 - _num2;
else if (_operator == "*")
_num1 = _num1 * _num2;
else if (_operator == "/")
_num1 = _num1 / _num2;
_operator = "-";
int q = radix;
string s = Convert.ToString((int)_num1, q);
textBoxResult.Text = s;
}
textBoxResult.Focus(); //使焦点落到编辑框中
textBoxResult.Select(textBoxResult.Text.Length, 0);//使光标落在编辑框最后面
}
private void buttonMul_Click(object sender, EventArgs e)
{
_firstNumFlag = true;
_operatorCount = _operatorCount 1;
if (_operatorCount == 1) //判断是否为第一个运算符
{
if (radix == 10)
{
_num1 = Convert.ToDouble(textBoxResult.Text); //保存第一个运算数
}
else
{
_num1 = Convert.ToInt32(textBoxResult.Text, radix);
}
_operator = "*"; //保存符号
textBoxResult.Text = ""; //清空
}
else
{
if (radix == 10)
{
_num2 = Convert.ToDouble(textBoxResult.Text);
}
else
{
_num2 = Convert.ToInt32(textBoxResult.Text, radix);
}
if (_operator == " ")
_num1 = _num1 _num2;
else if (_operator == "-")
_num1 = _num1 - _num2;
else if (_operator == "*")
_num1 = _num1 * _num2;
else if (_operator == "/")
_num1 = _num1 / _num2;
_operator = "*";
int q = radix;
string s = Convert.ToString((int)_num1, q);
textBoxResult.Text = s;
}
textBoxResult.Focus(); //使焦点落到编辑框中
textBoxResult.Select(textBoxResult.Text.Length, 0);//使光标落在编辑框最后面
}
private void buttonDiv_Click(object sender, EventArgs e)
{
_firstNumFlag = true;
_operatorCount = _operatorCount 1;
if (_operatorCount == 1) //判断是否为第一个运算符
{
if (radix == 10)
{
_num1 = Convert.ToDouble(textBoxResult.Text); //保存第一个运算数
}
else
{
_num1 = Convert.ToInt32(textBoxResult.Text, radix);
}
_operator = "/"; //保存符号
textBoxResult.Text = ""; //清空
}
else
{
if (radix == 10)
{
_num2 = Convert.ToDouble(textBoxResult.Text);
}
else
{
_num2 = Convert.ToInt32(textBoxResult.Text, radix);
}
if (_operator == " ")
_num1 = _num1 _num2;
else if (_operator == "-")
_num1 = _num1 - _num2;
else if (_operator == "*")
_num1 = _num1 * _num2;
else if (_operator == "/")
_num1 = _num1 / _num2;
_operator = "/";
int q = radix;
string s = Convert.ToString((int)_num1, q);
textBoxResult.Text = s;
}
textBoxResult.Focus(); //使焦点落到编辑框中
textBoxResult.Select(textBoxResult.Text.Length, 0);//使光标落在编辑框最后面
}
private void buttonEqu_Click(object sender, EventArgs e)
{
if (radix == 10)
{
_num2 = Convert.ToDouble(textBoxResult.Text);
}
else
{
_num2 = Convert.ToInt32(textBoxResult.Text, radix);
}
if (_operator == " ")
_result = _num1 _num2;
else if (_operator == "-")
_result = _num1 - _num2;
else if (_operator == "*")
_result = _num1 * _num2;
else if (_operator == "/")
_result = _num1 / _num2;
//进行运算
int q = radix;
string s = Convert.ToString((int)_result, q);
textBoxResult.Text = s; //显示结果
_operator = "=";
_operatorCount = 0; //运算符号数清零
textBoxResult.Focus(); //使焦点落到编辑框中
textBoxResult.Select(textBoxResult.Text.Length, 0);//使光标落在编辑框最后面
}
private void buttonBackSpace_Click(object sender, EventArgs e)
{
//如果不为空
if (textBoxResult.Text.Length > 0)
textBoxResult.Text = textBoxResult.Text.Substring(0, textBoxResult.Text.Length - 1);
//去除最后一个字符
textBoxResult.Focus(); //使焦点落到编辑框中
textBoxResult.Select(textBoxResult.Text.Length, 0);//使光标落在编辑框最后面
}
private void buttonClear_Click(object sender, EventArgs e)
{
_num1 = 0;
_num2 = 0;
_result = 0;
_operator = "";
_firstNumFlag = false;
textBoxResult.Text = "";
textBoxResult.Focus(); //使焦点落到编辑框中
textBoxResult.Select(textBoxResult.Text.Length, 0);//使光标落在编辑框最后面
}
private void buttonSign_Click(object sender, EventArgs e)
{
//如果非空
if (textBoxResult.Text.Length >= 1)
{
string firstChar = textBoxResult.Text.Substring(0, 1);//获取第一个字符
//判断第一个字符正负
if (firstChar == "-")
textBoxResult.Text = " " textBoxResult.Text.Substring(1, textBoxResult.Text.Length - 1);
else if (firstChar == " ")
textBoxResult.Text = "-" textBoxResult.Text.Substring(1, textBoxResult.Text.Length - 1);
else
textBoxResult.Text = "-" textBoxResult.Text;
}
textBoxResult.Focus(); //使焦点落到编辑框中
textBoxResult.Select(textBoxResult.Text.Length, 0);//使光标落在编辑框最后面
}
//编辑框键盘下压事件响应方法
private void textBoxResult_KeyPress(object sender, KeyPressEventArgs e)
{
if (e.KeyChar == '0')
button0_Click(sender, e);
else if (e.KeyChar == '1')
button1_Click(sender, e);
else if (e.KeyChar == '2')
button2_Click(sender, e);
else if (e.KeyChar == '3')
button3_Click(sender, e);
else if (e.KeyChar == '4')
button4_Click(sender, e);
else if (e.KeyChar == '5')
button5_Click(sender, e);
else if (e.KeyChar == '6')
button6_Click(sender, e);
else if (e.KeyChar == '7')
button7_Click(sender, e);
else if (e.KeyChar == '8')
button8_Click(sender, e);
else if (e.KeyChar == '9')
button9_Click(sender, e);
else if (e.KeyChar == '.')
buttonDot_Click(sender, e);
else if (e.KeyChar == ' ')
buttonAdd_Click(sender, e);
else if (e.KeyChar == '-')
buttonSub_Click(sender, e);
else if (e.KeyChar == '*')
buttonMul_Click(sender, e);
else if (e.KeyChar == '/')
buttonDiv_Click(sender, e);
else if (e.KeyChar == '=')
buttonEqu_Click(sender, e);
else if (e.KeyChar == 'c')
buttonClear_Click(sender, e);
else if (e.KeyChar == '\b')
buttonBackSpace_Click(sender, e);
textBoxResult.Select(textBoxResult.Text.Length, 0);//使光标落在编辑框最后面
}
private void SetInputFocus()
{
textBoxResult.Focus();
textBoxResult.SelectionStart = textBoxResult.TextLength;
textBoxResult.SelectionLength = 0;
}
//设置进制。
private void SetInputRadix(int newRadix)
{
if (textBoxResult.TextLength == 0)
{
radix = newRadix;
return;
}
else
{
if (newRadix == 10)
{
int a = Convert.ToInt32(textBoxResult.Text, radix);
textBoxResult.Text = Convert.ToString(a);
radix = newRadix;
}
else
{
int a = Convert.ToInt32(textBoxResult.Text,radix);
radix = newRadix;
int q = radix;
string s = Convert.ToString((int)a, q);
textBoxResult.Text = s; //显示结果
}
}
}
//设置显示的按钮
private void SetButtonEnabled(int radix)
{
for (int i = 0; i < radix; i )
btns[i].Enabled = true;
for (int i = radix; i < btns.Length; i )
btns[i].Enabled = false;
if (radix == 10)
{
buttonDot.Enabled = true;
buttonSign.Enabled = true;
}
else
{
buttonDot.Enabled = false;
buttonSign.Enabled = false;
}
}
private void radioButton2_Click(object sender, EventArgs e)
{
_operatorCount = 0; //运算符号数清零
SetInputRadix(2);
SetButtonEnabled(2);
SetInputFocus();
}
private void radioButton8_Click(object sender, EventArgs e)
{
_operatorCount = 0; //运算符号数清零
SetInputRadix(8);
SetButtonEnabled(8);
SetInputFocus();
}
private void radioButton10_Click(object sender, EventArgs e)
{
_operatorCount = 0; //运算符号数清零
SetInputRadix(10);
SetButtonEnabled(10);
SetInputFocus();
}
private void Form1_Load(object sender, EventArgs e)
{
radix = 10;
radioButton10.Checked = true;
SetButtonEnabled(radix);
SetInputFocus();
}
}
}
标签： 计算器
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