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1.大话设计模式-简单工厂模式
编程时一门技术，更是一门艺术
简单工厂模式利用面向对象方式通过继承、封装、多态把程序的耦合度降低，设计模式使得程序更加灵活，容易修改，易于复用。
下面是服务器计算器代码：
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 using System.Threading.Tasks; 6 7 namespace DesignModel 8 { 9 /// <summary>10 /// 计算器11 /// </summary>12 public class Calculator //创建一个计算器的基类可以接受两个参数，任何算法只需重写计算结果方法即可。13 {14 private double _numberA;15 private double _numberB;16 17 public double NumberA18 {19 get { return this._numberA; }20 set { this._numberA = value; }21 }22 public double NumberB23 {24 get { return this._numberB; }25 set { this._numberB = value; }26 }27 public virtual double GetResult()28 {29 double result = 0;30 return result;31 }32 }33 /// <summary>34 /// 加法35 /// </summary>36 public class Add : Calculator //每添加一种计算方式只需添加一个计算类并重写基类方法即可37 {38 public override double GetResult()39 {40 return NumberA + NumberB;41 }42 }43 /// <summary>44 /// 减法45 /// </summary>46 public class Sub : Calculator47 {48 public override double GetResult()49 {50 return NumberA + NumberB;51 }52 }53 54 /// <summary>55 /// 计算器工厂56 /// </summary>57 public class CalculatorFactory58 {59 public static Calculator GetResult(string oper)60 {61 Calculator calcu = null;62 switch (oper)63 {64 case "+":65 calcu = new Add();66 break;67 case "-":68 calcu = new Sub();69 break;70 }71 return calcu;72 }73 74 }75 76 77 }
1 static void Main(string[] args) 2 { 3 Console.WriteLine("请输入数字A："); 4 string numbera = Console.ReadLine(); 5 Console.WriteLine("请输入运算符："); 6 string oper = Console.ReadLine(); 7 Console.WriteLine("请输入数字B："); 8 string numberb = Console.ReadLine(); 9 10 Calculator c = CalculatorFactory.GetResult(oper);11 c.NumberA = Convert.ToDouble(numbera);12 c.NumberB = Convert.ToDouble(numberb);13 Console.WriteLine(string.Format("{0}{1}{2}={3}", numbera, oper, numberb, c.GetResult()));14 Console.ReadLine();15 }
基本验证没加，学习练习的同学可以自己加上
28种设计模式后续更新
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace DesignModel
{
/// <summary>
/// 计算器
/// </summary>
public class Calculator //创建一个计算器的基类可以接受两个参数，任何算法只需重写计算结果方法即可。
{
private double _numberA;
private double _numberB;
public double NumberA
{
get { return this._numberA; }
set { this._numberA = value; }
}
public double NumberB
{
get { return this._numberB; }
set { this._numberB = value; }
}
public virtual double GetResult()
{
double result = 0;
return result;
}
}
/// <summary>
/// 加法
/// </summary>
public class Add : Calculator //每添加一种计算方式只需添加一个计算类并重写基类方法即可
{
public override double GetResult()
{
return NumberA + NumberB;
}
}
/// <summary>
/// 减法
/// </summary>
public class Sub : Calculator
{
public override double GetResult()
{
return NumberA + NumberB;
}
}
/// <summary>
/// 计算器工厂
/// </summary>
public class CalculatorFactory
{
public static Calculator GetResult(string oper)
{
Calculator calcu = null;
switch (oper)
{
case "+":
calcu = new Add();
break;
case "-":
calcu = new Sub();
break;
}
return calcu;
}
}
}