C#程序设计计算器编程代码.doc

using System;using System.Collections.Generic;using System.Linq;using System.Windows.Forms;namespace 计算器 static class Program / / 应用程序的主入口点。 / STAThread static void Main() Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new Form1(); using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;namespace 计算器 public partial class Form1 : Form public Form1() InitializeComponent(); private void button1_Click(object sender, EventArgs e) int first= 0, second= 0, result = 0; string symbol; first = Convert.ToInt16(textBox1 .Text .Trim (); second = Convert.ToInt16(textBox3.Text.Trim(); symbol = comboBox1.Text; switch (symbol ) case +: result =first +second ; break ; /方法的封装 case -: result = first - second; break; case *: result = first * second; break ; case /: result = first / second; break; textBox2.Text = result.ToString(); private void button3_Click(object sender, EventArgs e) int fir = 0, sec = 0, result = 0; string symbol; fir = Convert.ToInt16(textBox1.Text.Trim(); sec = Convert.ToInt16(textBox3.Text.Trim(); symbol = comboBox1.Text; 工厂.creatopertion(fir, sec, symbol ).getresult(); /静态方法不需要（暂时）实例化 直接调用 textBox2.Text = 工厂.creatopertion(fir, sec, symbol ).getresult().ToString(); private void button2_Click(object sender, EventArgs e) int fir = 0, sec = 0, result = 0; string symbol; fir = Convert.ToInt16(textBox1.Text.Trim(); sec = Convert.ToInt16(textBox3.Text.Trim(); symbol = comboBox1.Text; 封装 cal = new 封装(fir, sec, symbol); result = cal.getresult(); textBox2.Text = result.ToString(); using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace 计算器 class 多态和继承 public int fir; public int sec; public string syb; public 多态和继承(int fir, int sec, string syb) /构造函数 名称和类的名称相等 this.fir = fir; this.sec= sec; this.syb = syb; public virtual int getresult() /继承 int result = 0; return result; using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace 计算器 class 工厂 public static 多态和继承 creatopertion(int fir, int sec, string syb) 多态和继承 muti = null; /muti是从父类实列出来的一个对象 switch (syb) case +: muti = new 加(fir, sec, syb); break; case -: muti = new 减(fir, sec, syb); break; case *: muti = new 乘 (fir, sec, syb); break; case /: muti = new 除 (fir, sec, syb); break; return muti; using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace 计算器 class 封装 private int first; private int second; private string syb; public 封装(int fir,int sec,string syb) this.first = fir; this.second = sec; this.syb = syb; /运算符 public int getresult() int result = 0; switch (syb) case +: result =first +second ; break ; /方法的封装 case -: result = first - second; break; case *: result = first * second; break ; case /: result = first / second; break; return result; using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace 计算器 class 加:多态和继承 public 加(int fir, int sec, string syb) : base(fir, sec, syb) /继承父类的继承方法 public override int getresult() / int result=0; result =this.fir + this.sec; return result; using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace 计算器 class 减:多态和继承 public 减(int fir, int sec, string syb) : base(fir, sec, syb) /继承父类的继承方法 public override int getresult() / int result = 0; result = this.fir - this.sec; return result; using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace 计算器 class 乘 : 多态和继承 public 乘(int fir, int sec, string syb) : base(fir, sec, syb) /继承父类的继承方法 public override int getresult() / int result = 0; result = this.fir * this.sec; return result; using System;using System.Collections.Generic;using System.Linq;using System.Text