簡單計算機 C# 學習

標籤：

C# 原始碼

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

實現加減乘除 平方開放倒數 鍵盤輸入
記錄查詢和刪除


未實現記憶加減功能

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();        }                /*連等功能         ///儲存最近輸入的數字e_Num和最近的操作e_Op        ///button CE 儲存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="";//運算子        double num1=0;        double num2=0;        double res=0;        int iOp = 0;//運算子位置        bool newOp = true;  //開始新的運算        bool addOp = false;                //鍵入數字        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;                //*/            }            ///*  擷取button值，賦值給textNumBox.Ttext            ///多個button的Click事件同時命名為button_Click_Num            ///實現批量的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);//並不會用該函數        }        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);//並不會用該函數        }        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裡判斷是否是重新開始的計算，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,第二個參數是substring起始之後多少個                    }        //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)  //不能轉化為double的異常下用res結果計算            {                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)  //不能轉化為double的異常下用res結果計算            {                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();   //開啟新的視窗，要先new 方法            aboutbox.ShowDialog();        }        private void Click_History(object sender, EventArgs e)        {            History historybox = new History();   //開啟新的視窗，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裡判斷是否是重新開始的計算，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,第二個參數是substring起始之後多少個                                    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;                    }            }        }    }    //記錄傳遞    public class Common    {        public static List<string> historylist = new List<string>();        public static int a = 0;    }}

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 History : Form    {        public History()        {            InitializeComponent();        }        private void button_Click_Copy(object sender, EventArgs e)        {            Clipboard.SetText(listBox1.Items[listBox1.SelectedIndex].ToString());        }        private void button_Click_Delete(object sender, EventArgs e)        {            //listBox1.ClearSelected();            //listBox1.Items.Clear(); 清除全部            int sel = listBox1.SelectedIndex;            listBox1.Items.RemoveAt(sel);        }        private void History_Load(object sender, EventArgs e)        {            foreach (string a in Common.historylist)            {                listBox1.Items.Add(a);            }        }    }}

簡單計算機 C# 學習