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程時(shí)一門技術(shù)，更是一門藝術(shù)

簡單工廠模式利用面向?qū)ο蠓绞酵ㄟ^繼承、封裝、多態(tài)把程序的耦合度降低，設(shè)計(jì)模式使得程序更加靈活，容易修改，易于復(fù)用。

下面是服務(wù)器計(jì)算器代碼：

代碼如下:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace DesignModel

{

/// <summary>

/// 計(jì)算器

/// </summary>

public class Calculator //創(chuàng)建一個(gè)計(jì)算器的基類可以接受兩個(gè)參數(shù)，任何算法只需重寫計(jì)算結(jié)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 //每添加一種計(jì)算方式只需添加一個(gè)計(jì)算類并重寫基類方法即可

{

public override double GetResult()

{

return NumberA + NumberB;

}

}

/// <summary>

/// 減法

/// </summary>

public class Sub : Calculator

{

public override double GetResult()

{

return NumberA + NumberB;

}

}

/// <summary>

/// 計(jì)算器工廠

/// </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;

}

}

}

復(fù)制代碼 代碼如下:

static void Main(string[] args)

{

Console.WriteLine("請輸入數(shù)字A：");

string numbera = Console.ReadLine();

Console.WriteLine("請輸入運(yùn)算符：");

string oper = Console.ReadLine();

Console.WriteLine("請輸入數(shù)字B：");

string numberb = Console.ReadLine();

Calculator c = CalculatorFactory.GetResult(oper);

c.NumberA = Convert.ToDouble(numbera);

c.NumberB = Convert.ToDouble(numberb);

Console.WriteLine(string.Format("{0}{1}{2}={3}", numbera, oper, numberb, c.GetResult()));

Console.ReadLine();

}

基本驗(yàn)證沒加，學(xué)習(xí)練習(xí)的同學(xué)可以自己加上

28種設(shè)計(jì)模式后續(xù)更新

代碼如下:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace DesignModel

{

/// <summary>

/// 計(jì)算器

/// </summary>

public class Calculator //創(chuàng)建一個(gè)計(jì)算器的基類可以接受兩個(gè)參數(shù)，任何算法只需重寫計(jì)算結(jié)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 //每添加一種計(jì)算方式只需添加一個(gè)計(jì)算類并重寫基類方法即可

{

public override double GetResult()

{

return NumberA + NumberB;

}

}

/// <summary>

/// 減法

/// </summary>

public class Sub : Calculator

{

public override double GetResult()

{

return NumberA + NumberB;

}

}

/// <summary>

/// 計(jì)算器工廠

/// </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;

}

}

}

本文就是.net設(shè)計(jì)模式中的簡單工廠模式的內(nèi)容了，非常簡單，下一篇，我們來談?wù)劜呗阅Ｊ?/P>

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