https://git.oschina.net/363451039/Jisuanqi

实现加减乘除 平方开放倒数 键盘输入
历史记录查询和删除


未实现记忆加减功能

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 WindowsFormsApplication3 { public partial class MainForm : Form { public MainForm() { InitializeComponent(); } /*连等功能 ///存储最近输入的数字e_Num和最近的操作e_Op ///button CE 保存e_Num,而button C 清空e_Num和e_Op double e_Num = 0; double e_Res=0; string e_Op=""; //*/ string op="";//运算符 double num1=0; double num2=0; double res=0; int iOp = 0;//运算符位置 bool newOp = true; //开始新的运算 bool addOp = false; //键入数字 private void button_Click_Num(object sender, EventArgs e) { if (newOp) { textNumBox.Text = ""; newOp = false; addOp = false; /* e_Num = num2; e_Res=res; e_Op=op; //*/ } ///* 获取button值，，赋值给textNumBox.Ttext ///多个button的Click事件同时命名为button_Click_Num ///实现批量的button_Click_Num的操作 Button tempNum = (Button) sender; textNumBox.Text += tempNum.Text.ToString(); //*/ } private void button_Click_Op(object sender, EventArgs e) { Button tempOp = (Button)sender; operater(tempOp.Text.ToString()); } private void operater(string oper) { if (addOp) { textNumBox.Text = Convert.ToString(res) + oper; newOp = false; } else { textNumBox.Text += oper; } op=oper; //e_Op=tempOp.Text.Tostring(); //e_num1=textNumBox.Text.Substring(0, textNumBox.Text.Length - 1); //e_num2=textNumBox.Text.SkipWhile<char>(char i,result<char,i==‘+‘||i==‘-‘||i==‘ב||i==‘÷‘>predicate);//并不会用该函数 } private void operater(char oper) { if (addOp) { newOp = false; } op = Convert.ToString(oper); //e_Op=tempOp.Text.Tostring(); //e_num1=textNumBox.Text.Substring(0, textNumBox.Text.Length - 1); //e_num2=textNumBox.Text.SkipWhile<char>(char i,result<char,i==‘+‘||i==‘-‘||i==‘ב||i==‘÷‘>predicate);//并不会用该函数 } private void button_Click_Del(object sender, EventArgs e) { if (textNumBox.Text.Length > 0) { textNumBox.Text = textNumBox.Text.Substring(0, textNumBox.Text.Length - 1); newOp = false; } } private void button_Click_CE(object sender, EventArgs e) { textNumBox.Text = ""; newOp = true; } private void button_Click_C(object sender, EventArgs e) { textNumBox.Text = ""; /* e_Num = 0; e_Op = ""; //*/ } private void button_Click_Result(object sender, EventArgs e) { try { //if (newOp) 不要在result里判断是否是重新开始的计算，而是更新textNumBox.Text //{ result(); res = Operate(op); newOp = true; addOp = true; Common.historylist.Add(textNumBox.Text); //} //else //{ // result(res); // res = Operate(op); //} } catch (Exception exc) { textNumBox.Text= "Error"; newOp = false; addOp = true; } } private void result() { iOp = textNumBox.Text.IndexOf(op); num1 = Convert.ToDouble(textNumBox.Text.Substring(0, iOp)); num2 = Convert.ToDouble(textNumBox.Text.Substring(iOp + 1, textNumBox.Text.Length - iOp - 1));//-iOp,第二个参数是substring起始之后多少个 } //private void result(double oldnum) //{ // iOp=textNumBox.Text.LastIndexOf(op); // num1 = oldnum; // num2 = Convert.ToDouble(textNumBox.Text.Substring(iOp + 1, textNumBox.Text.Length - iOp - 1)); //} private double Operate(string opp) { double ress; if (op == "+") { ress = num1 + num2; textNumBox.Text += "=" + ress; } else if (op == "-") { ress = num1 - num2; textNumBox.Text += "=" + ress; } else if (op == "×") { ress = num1 * num2; textNumBox.Text += "=" + ress; } else if (op == "÷") { ress = num1 / num2; textNumBox.Text += "=" + ress; } else { ress = 0; } return ress; } private void button_Click_fushu(object sender, EventArgs e) { textNumBox.Text += "-"; newOp = false; Common.historylist.Add(textNumBox.Text); } private void button_Click_pingfanggen(object sender, EventArgs e) { double numtemp; try { numtemp = Convert.ToDouble(textNumBox.Text); } catch (System.FormatException) //不能转化为double的异常下用res结果计算 { numtemp = res; } res = Math.Sqrt(numtemp); textNumBox.Text = "√（" + numtemp + ")=" + res; newOp = true; Common.historylist.Add(textNumBox.Text); } private void button_Click_daoshu(object sender, EventArgs e) { double numtemp; try { numtemp = Convert.ToDouble(textNumBox.Text); } catch (System.FormatException) //不能转化为double的异常下用res结果计算 { numtemp = res; } res = 1/numtemp; textNumBox.Text = "1/（" + numtemp + ")=" + Convert.ToString(res); newOp = true; Common.historylist.Add(textNumBox.Text); } private void Click_About(object sender, EventArgs e) { About aboutbox = new About(); //打开新的窗口，要先new 方法 aboutbox.ShowDialog(); } private void Click_History(object sender, EventArgs e) { History historybox = new History(); //打开新的窗口，要先new 方法 historybox.ShowDialog(); } private void Click_PasteNow(object sender, EventArgs e) { textNumBox.Text += Clipboard.GetText(); } private void Click_CopyNow(object sender, EventArgs e) { Clipboard.SetText(textNumBox.Text); } bool flag = true; private void KeyPress_EqueKey(object sender, KeyPressEventArgs e) { switch (e.KeyChar) { case ‘=‘: { if (flag) { flag = false; try { //if (newOp) 不要在result里判断是否是重新开始的计算，而是更新textNumBox.Text { //textNumBox.Text += "="; //result(); //if (textNumBox.Text.Length > 0) //{ // textNumBox.Text = textNumBox.Text.Substring(0, textNumBox.Text.Length - 2); // newOp = false; //} iOp = textNumBox.Text.IndexOf(op); int op0 = textNumBox.Text[0];//(0); int op1 = textNumBox.Text[1]; num1 = Convert.ToDouble(textNumBox.Text.Substring(0, iOp)); //string temp = textNumBox.Text.Substring(iOp + 1, textNumBox.Text.Length - iOp-1); num2 = Convert.ToDouble(textNumBox.Text.Substring(iOp + 1, textNumBox.Text.Length - iOp - 1));//-iOp,第二个参数是substring起始之后多少个 res = Operate(op); newOp = true; addOp = true; Common.historylist.Add(textNumBox.Text); } //else //{ // result(res); // res = Operate(op); //} } catch (Exception exc) { textNumBox.Text = "Error"; newOp = false; addOp = true; } } else { flag = true; //textNumBox.Text.Substring(1, textNumBox.Text.Length - 1); } break; } case ‘+‘: { operater(‘+‘); break; } case ‘-‘: { operater(‘-‘); break; } case ‘*‘: { operater(‘ב); break; } case ‘/‘: { operater(‘÷‘); break; } } } } //历史记录传递 public class Common { public static List<string> historylist = new List<string>(); public static int a = 0; } }