C#语言实现仿Windows系统计算器

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 MyCaler { public partial class Form1 : Form { public Form1() { InitializeComponent(); txtCal.Text = "0"; } public string number; public int OperationType;//适用于计算的类型，应用数字去控制算法 public double number1, number2; public string Temp;//适用于复制储存中的数据 public double TempData = 0;//适用于M等操作的变量 public string fl; string temp = "";//存储正负数临时变量 private void btnNum0_Click(object sender, EventArgs e) { if (txtCal.Text == "0") { number = "0"; txtCal.Text = Convert.ToString(number); } else { number = number + "0"; number2 = Convert.ToDouble(number); txtCal.Text = number; } } private void btnNum1_Click(object sender, EventArgs e) { if (txtCal.Text == "0") { number = "1"; txtCal.Text = Convert.ToString(number); } else if (txtCal.Text == fl) { number = "1"; txtCal.Text = Convert.ToString(number); } else { number = number + "1"; number2 = Convert.ToDouble(number); txtCal.Text = number; } } private void btnNum2_Click(object sender, EventArgs e) { if (txtCal.Text == "0") { number = "2"; txtCal.Text = Convert.ToString(number); } else if (txtCal.Text == fl) { number = "2"; txtCal.Text = Convert.ToString(number); } else { number = number + "2"; number2 = Convert.ToDouble(number); txtCal.Text = number; } } private void btnNum3_Click(object sender, EventArgs e) { if (txtCal.Text == "0") { number = "3"; txtCal.Text = Convert.ToString(number); } else if (txtCal.Text == fl) { number = "3"; txtCal.Text = Convert.ToString(number); } else { number = number + "3"; number2 = Convert.ToDouble(number); txtCal.Text = number; } } private void btnNum4_Click(object sender, EventArgs e) { if (txtCal.Text == "0") { number = "4"; txtCal.Text = Convert.ToString(number); } else if (txtCal.Text == fl) { number = "4"; txtCal.Text = Convert.ToString(number); } else { number = number + "4"; number2 = Convert.ToDouble(number); txtCal.Text = number; } } private void btnNum5_Click(object sender, EventArgs e) { if (txtCal.Text == "0") { number = "5"; txtCal.Text = Convert.ToString(number); } else if (txtCal.Text == fl) { number = "5"; txtCal.Text = Convert.ToString(number); } else { number = number + "5"; number2 = Convert.ToDouble(number); txtCal.Text = number; } } private void btnNum6_Click(object sender, EventArgs e) { if (txtCal.Text == "0") { number = "6"; txtCal.Text = Convert.ToString(number); } else if (txtCal.Text == fl) { number = "6"; txtCal.Text = Convert.ToString(number); } else { number = number + "6"; number2 = Convert.ToDouble(number); txtCal.Text = number; } } private void btnNum7_Click(object sender, EventArgs e) { if (txtCal.Text == "0") { number = "7"; txtCal.Text = Convert.ToString(number); } else if (txtCal.Text == fl) { number = "7"; txtCal.Text = Convert.ToString(number); } else { number = number + "7"; number2 = Convert.ToDouble(number); txtCal.Text = number; } } private void btnNum8_Click(object sender, EventArgs e) { if (txtCal.Text == "0") { number = "8"; txtCal.Text = Convert.ToString(number); } else if (txtCal.Text == fl) { number = "8"; txtCal.Text = Convert.ToString(number); } else { number = number + "8"; number2 = Convert.ToDouble(number); txtCal.Text = number; } } private void btnNum9_Click(object sender, EventArgs e) { if (txtCal.Text == "0") { number = "9"; txtCal.Text = Convert.ToString(number); } else if (txtCal.Text == fl) { number = "9"; txtCal.Text = Convert.ToString(number); } else { number = number + "9"; number2 = Convert.ToDouble(number); txtCal.Text = number; } } private void btnBackspac_Click(object sender, EventArgs e) { if (txtCal.Text.Length > 0) { txtCal.Text = txtCal.Text.Substring(0, txtCal.Text.Length - 1); if (txtCal.Text.Length == 0) { txtCal.Text = "0"; } } } private void btnCE_Click(object sender, EventArgs e) { number = "0"; txtCal.Text = number; } private void bntC_Click(object sender, EventArgs e) { number = "0"; txtCal.Text = number; } private void btnAdd_Click(object sender, EventArgs e) { if (txtCal.Text.Length > 0) { number1 = Convert.ToDouble(txtCal.Text); fl = number1.ToString(); number = ""; OperationType = 1; txtCal.Text = fl; } } private void btnSub_Click(object sender, EventArgs e) { if (txtCal.Text.Length > 0) { number1 = Convert.ToDouble(txtCal.Text); fl = number1.ToString(); number = ""; OperationType = 2; txtCal.Text = fl; } } private void btnMulti_Click(object sender, EventArgs e) { if (txtCal.Text.Length > 0) { number1 = Convert.ToDouble(txtCal.Text); fl = number1.ToString(); numbe