Design Patterns: Solidify Your C# Application Arch

Design Patterns: Solidify Your C# Application Architecture with Design Patterns中文版(尾篇一)    optimizer（翻譯）

關鍵字     設計模式 singleton strategy decorator composite state

出處     http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnmag01/html/PATTERNS.asp

Design Patterns: Solidify Your C# Application Architecture with Design Patterns中文版(尾篇一)
作者：Samir Bajaj
譯者：榮耀
【譯序：C#進階文章。譯者對Samir提供的C#例子進行了簡單整理（作者提供的某些代碼在譯者的環境中無法通過編譯），並編寫了對應的C++樣本，一併置於譯註中，以便讀者比對。譯文中所有C#、C++程式調試環境均為Microsoft Visual Studio.NET 7.0 Beta2】
【譯註：以下是state模式完整樣本
C#樣本：
using System;
abstract class State
{
     public virtual void AddNickel(VendingMachine vm) { }
     public virtual void AddDime(VendingMachine vm) { }
     public virtual void AddQuarter(VendingMachine vm) { }
     protected virtual void ChangeState(VendingMachine vm, State s)
     {
          vm.ChangeState(s);
     }
}
class VendingMachine
{
     private State state;
     public VendingMachine()
     {
          Console.WriteLine("The Vending Machine is now online: product costs 25c");
         state = Start.Instance();
     }
     public void ChangeState(State to)
     {
         state = to;