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 简易计算器 { public partial class calc : Form { private bool ClearDisplay = true; private bool Spequal = true; //判断等号是否按下 private bool Spresult = true; //控制result时不能<- private bool Spfirst = true; //控制初始为0 private bool Spdis=false;//Operand1解决 private bool Spcomma=true; // private bool Spoperator1; // private bool Spoperator = false;//判断是否 -*/连续出现 private string Operator="=",Operator1="="; private double Operand1; private double Operand2; private double result; private System.Windows.Forms.Button btn; public calc() { InitializeComponent(); if (Spfirst) { txtDisplay.Text = "0"; ClearDisplay = true; Operand1 =Operand2 = 0; Spfirst = false; } } private void calc_Load(object sender, EventArgs e) { } private void button_11_Click(object sender, EventArgs e) //C 清所有 { Operand1 = 0; Operand2 = 0; result = 0; txtDisplay.Text = "0"; Spequal = true; ClearDisplay = true; Spresult = false; Spdis = false; Operator1 = "="; Operator = "="; } private void handleDigits(object sender, EventArgs e) { /* if ((Operator!="=")||(Operator1!="=")) { Spoperator = true; } if (Spoperator) { //double result = 0; Operand2 = System.Convert.ToDouble(txtDisplay.Text); switch (Operator) { case " ": Operand1 = Operand1 Operand2; break; case "-": Operand1 = Operand1 - Operand2; break; case "*": Operand1 = Operand1 * Operand2; break; case "/": Operand1 = Operand1 / Operand2; break; case "^": Operand1 = System.Math.Pow(Operand1, Operand2); break; } txtDisplay.Text = Operand1.ToString(); ClearDisplay = true; Spoperator = false; // Spequal = false; //等号是否按下 // Spresult = false; //为结果时不能执行<- } else{ btn = (Button)sender; if (ClearDisplay) { txtDisplay.Text = ""; ClearDisplay = false; } txtDisplay.Text = txtDisplay.Text btn.Text; Spresult = true; }*/ btn = (Button)sender; if (ClearDisplay) { txtDisplay.Text = ""; ClearDisplay = false; } //////改 if (txtDisplay.Text.IndexOf(".") == -1) { txtDisplay.Text = txtDisplay.Text btn.Text; Spresult = true; //控制result时不能 < - Spdis = true;//Operand1解决 Spequal = true; } else { if(btn.Text ==".") { txtDisplay.Text = txtDisplay.Text; } else { txtDisplay.Text = txtDisplay.Text btn.Text ; Spresult = true; //控制result时不能 < - Spdis = true;//Operand1解决 Spequal = true; } } /*原始 txtDisplay.Text = txtDisplay.Text btn.Text; Spresult = true; //控制result时不能 < - Spdis = true;//Operand1解决 Spequal = true;*/ // Operator1 = Operator; } private void handleoperator(object sender, EventArgs e)//操作符 { // if (Spequal) //判断符号是否按下 // { btn = (Button)sender; Operator = btn.Text; if ((Operator != "=") && (Operator1 != "=") && (Spdis))//Operand1解决 { //txtDisplay.Text = "进了1"; switch (Operator1) { case " ": Operand1 = Operand1 System.Convert.ToDouble(txtDisplay.Text);//txtDisplay.Text = "进了2"; txtDisplay.Text = Operand1.ToString(); break; case "-": Operand1 = Operand1 - System.Convert.ToDouble(txtDisplay.Text);//txtDisplay.Text = "进了3"; txtDisplay.Text = Operand1.ToString(); break; case "*": Operand1 = Operand1 * System.Convert.ToDouble(txtDisplay.Text); txtDisplay.Text = Operand1.ToString(); break; case "/": Operand1 = Operand1 / System.Convert.ToDouble(txtDisplay.Text); txtDisplay.Text = Operand1.ToString(); break; case "^": Operand1 = System.Math.Pow(Operand1, System.Convert.ToDouble(txtDisplay.Text)); txtDisplay.Text = Operand1.ToString(); break; } ClearDisplay = true; // ***Spequal = true; Spdis = false; //Operand1解决 Spresult = false; //等号没有按下,等号可使用 Operator1 = Operator; Spequal = true; Spfirst = false; } else { Operand1 = System.Convert.ToDouble(txtDisplay.Text); ClearDisplay = true; //***Spequal = true; Spdis = false; //Operand1解决 Operator1 = Operator; Spequal = true; Spresult = false; Spfirst = false; } //} /*原始 btn = (Button)sender; Operator = btn.Text; Operand1 = System.Convert.ToDouble(txtDisplay.Text); //txtDisplay.Text = ""; ClearDisplay = true; Spequal = true;*/ } private void button_20_Click(object sender, EventArgs e) //= { if (Spequal && Spdis) //Spdis -Operand1解决 { double result = 0; Operand2 = System.Convert.ToDouble(txtDisplay.Text); switch (Operator) { case " ": result = Operand1 Operand2; break; case "-": result = Operand1 - Operand2; break; case "*": result = Operand1 * Operand2; break; case "/": result = Operand1 / Operand2; break; case "^": result = System.Math.Pow(Operand1, Operand2); break; } txtDisplay.Text = result.ToString(); ClearDisplay = true; Spequal = false; //判断等号是否按下 Spresult = false; //控制result时不能<- Operand1 = Operand2 = 0; //Operator1 = "="; } Operator = "="; Operator1 = "="; } private void button_18_Click(object sender, EventArgs e) // -/ { result = -Convert.ToDouble(txtDisplay.Text); txtDisplay.Text = result.ToString(); } private void button_19_Click(object sender, EventArgs e) // 1/x { if (txtDisplay.Text != "0") { result = 1.0 / Convert.ToDouble(txtDisplay.Text); txtDisplay.Text = result.ToString(); ClearDisplay = true; } } private void button_22_Click(object sender, EventArgs e) //CE 清除目前 { txtDisplay.Text = "0"; ClearDisplay = true; Spequal = true; Spdis = false; } private void button_21_Click(object sender, EventArgs e) // <- { if(Spresult) { if (txtDisplay.Text.Length > 0) { txtDisplay.Text = txtDisplay.Text.Substring(0, txtDisplay.Text.Length - 1); if (txtDisplay.Text.Length == 0) { txtDisplay.Text = "0"; ClearDisplay = true; } } } } } }
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