求一个用简单工厂模式编写的C#计算器，只有加减乘除和等于就好~谢谢~

求一个用简单工厂模式编写的C#计算器，只有加减乘除和等于就好~谢谢~

//这个程序只是实现两个数的加减乘除，其它的功能由于时间原因没写。有兴趣加群113572029
//五个类
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Test
{
abstract class Count
{
private double one;
public double One
{
get { return one; }
set { one = value; }
}
private double two;
public double Two
{
get { return two; }
set { two = value; }
}
public Count(){}
public Count(double one, double two)
{
this.One = one;
this.Two = two;
}
public abstract double count();
}
//加
class Add : Count
{
public Add()
:base(){}
public Add(double one, double two)
:base(one,two)
{
this.One = one;
this.Two = two;
}
public override double count()
{
return this.One + this.Two;
}
}
//减
class Cut : Count
{
public Cut()
: base() { }
public Cut(double one, double two)
: base(one, two)
{
this.One = one;
this.Two = two;
}
public override double count()
{
return this.One - this.Two;
}
}
//乘
class Ride : Count
{
public Ride()
: base() { }
public Ride(double one, double two)
: base(one, two)
{
this.One = one;
this.Two = two;
}
public override double count()
{
return this.One * this.Two;
}
}
//除
class Divide : Count
{
public Divide()
: base() { }
public Divide(double one, double two)
: base(one, two)
{
this.One = one;
this.Two = two;
}
public override double count()
{
return this.One / this.Two;
}
}
}
//简单的工厂模式
private void button1_Click(object sender, EventArgs e)
{
try
{
Count count = null;
switch (comboBox1.Text)
{
case "+":
count = new Add(double.Parse(txtOne.Text), double.Parse(txtTwo.Text));
break;
case "-":
count = new Cut(double.Parse(txtOne.Text), double.Parse(txtTwo.Text));
break;
case "*":
count = new Ride(double.Parse(txtOne.Text), double.Parse(txtTwo.Text));
break;
case "/":
count = new Divide(double.Parse(txtOne.Text), double.Parse(txtTwo.Text));
break;

}
if (count != null)
txtCount.Text = count.count().ToString();
else
MessageBox.Show("系统错误！");
}
catch
{
MessageBox.Show("请输入合法的操作数!");
}
}

这是我的个人理解： 简单工厂模式的创建步骤： 1、定义申明一个基类 2、建立多个继承同一个的基类的子类。 3、再把子类捆绑到同一个对外接口上 我写的是控制台程序总共有6个类:其中Operate类为基类，其他的4个类为Operate的子类（Add,Sub,Multiply,Div），factory就是那个对外接口。没有实现 等于 功能，其实factory类就相当于等于功能。 Operate类 using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace _4 { class Operate { int number_L; protected int Number_L { get { return number_L; } } int number_R; protected int Number_R { get { return number_R; } } public Operate(int value_L,int value_R) { this.number_L = value_L; this.number_R = value_R; } public virtual int Result() { return 0; } } } 四个子类只是重写了父类中的 Result方法 using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace _4 { class Add:Operate //加法实现 { public Add(int value_L, int value_R) : base(value_L, value_R) { } public override int Result() { return this.Number_L + this.Number_R; } } } using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace _4 { class Sub:Operate //减法实现 { public Sub(int value_L, int value_R) : base(value_L, value_R) { } public override int Result() { return this.Number_L - this.Number_R; } } } using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace _4 { class Mutiply:Operate //乘法实现 { public Mutiply(int value_L, int value_R) : base(value_L, value_R) { } public override int Result() { return this.Number_L * this.Number_R; } } } using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace _4 { class Div:Operate //除法实现 { public Div(int value_L, int value_R) : base(value_L, value_R) { } public override int Result() { if (Number_R == 0) return int.MaxValue; return Number_L / Number_R; } } } using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace _4 { class Factory //工厂实现，此处可以与 = 相对应 { public Operate Choice(int value_L, int value_R, char value_op) { Operate op = null; switch (value_op) { case '+': op=new Add(value_L,value_R); break; case '-': op=new Sub(value_L, value_R); break; case '*': op= new Mutiply(value_L,value_R); break; case '/': op= new Div(value_L, value_R); break; default: break; } return op; } } } 主程序的实现 using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace _4 { class Program { static void Main(string[] args) { Factory factory = new Factory(); Console.WriteLine("请输入第一个数字："); int value_L = int.Parse(Console.ReadLine()); Console.WriteLine("请输入第二个数字："); int value_R = int.Parse(Console.ReadLine()); Console.WriteLine("请输入运算符号（'+'、'-'、'*'、'/'):"); char value_Op=Convert.ToChar(Console.ReadLine()); Console.WriteLine("运算结果："); int result = factory.Choice(value_L, value_R, value_Op).Result(); Console.WriteLine(result); Console.Read(); } } }

基本和c++一样，区别在于界面设计～当然语法也略有差别。 具体步骤 1、新建窗体，添加数字，运算符号按钮，文本框(近用于显示) 2、为各个按钮编写onclick事件响应函数，主要是记录用户输入和在文本框中显示 3、按下=时计算结果，并将结果显示在文本框中