Design Pattern 3-Composite_eq e1=new eq();-优快云博客

本文链接：https://blog.youkuaiyun.com/2002pine/article/details/116734

博客展示了一段C#代码，实现了合成模式。定义了抽象类Equipment及其子类eq1、eq2，还有继承自Equipment的CompositeEquipment类。CompositeEquipment类可添加、移除设备，能计算设备的实价和折扣价，最后进行了实例化和价格计算输出。

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using System;

namespace Pattern
{
/// <summary>
/// Summary description for Class1.
/// </summary>
public class CompositeEquipment:Equipment
{
  System.Collections.ArrayList list=new System.Collections.ArrayList();
  public CompositeEquipment (string name) :base(name)
  {
   //
   // TODO: Add constructor logic here
   //
  }
  public bool add(Equipment equipment)
  {
   list.Add(equipment);
   return base.add(equipment);
  }
  public bool remove(Equipment equipment)
  {
   list.Remove (equipment);
   return base.remove(equipment);
  }
  public override double discountPrice()
  {
   double res=0;
   foreach(Equipment e in list)
   {
               res+=e.discountPrice();
   }
   return res;
  }
  public override double netPrice()
  {
   double res=0;
   foreach(Equipment e in list)
   {
    res+=e.netPrice();
   }
   return res;
  }

}

public abstract class Equipment
{
  private string name; 　　//实价　
  public abstract double netPrice();　　//折扣价格　
  public abstract double discountPrice();　　//增加部件方法　　
  public bool add(Equipment equipment) { return false; }　　//删除部件方法
  public bool remove(Equipment equipment) { return false; }　　//注意这里，这里就提供一种用于访问组合体类的部件方法。　　

  public Equipment( string name) { this.name=name; }
  public string getName(){return this.name;}
}

public class eq1:Equipment
{
  public eq1(string name) :base(name)
  {
  }
  public override double discountPrice()
  {

   return 80;
  }
  public override double netPrice()
  {

   return 100;
  }

}

public class eq2:Equipment
{
  public eq2(string name) :base(name)
  {
  }
  public override double discountPrice()
  {

   return 800;
  }
  public override double netPrice()
  {

   return 1000;
  }

}

}

   //合成模式
   Equipment e1=new eq1("eq1");
Equipment e2=new eq2("eq2");
  CompositeEquipment s=new CompositeEquipment("s");
   s.add(e1);
   s.add(e2);
  Console.WriteLine(s.netPrice().ToString());
  Console.WriteLine(s.discountPrice ().ToString());
      Console.WriteLine(s.getName());
  Console.WriteLine(e1.getName());
  Console.WriteLine(e2.getName());