设计模式之工厂方法

//核心逻辑组
class IShow
{
public:
  virtual void show(const char* szText)=0;
  virtual ~IShow(){};
};
class IGlobe
{
public:
  virtual IShow& GetShow() =0;
};
void Init(IGlobe& globe,UINT uID )
{
  if( 0 == uID )
  {
    globe.GetShow().show("错误的账号ID(标识符)");
  }
}
//服务端业务逻辑组
namespace NServer
{
  class CShow : public IShow
  {
    virtual void show(const char* szText)
    {
      //将szText记录到日志文件中
    }
  };
  class CGlobe : public IGlobe
  {
  private :
    virtual IShow& GetShow()
    {
      return m_show ;
    }
    CShow m_show ;
  };
}
//客户端业务逻辑组
namespace NClient
{
  class CShow : public IShow
  {
    virtual void show(const char* szText)
    {
      AfxMessageBox(szText);
    }
  };
  class CGlobe : public IGlobe
  {
  private :
    virtual IShow& GetShow()
    {
      return m_show ;
    }
    CShow m_show ;
  };
}
//服务端实现组
void CTest3Dlg::OnButton1() 
{
  NServer::CGlobe g_globe ;
  //...
  UINT uID = 0 ;
  //...
  Init(g_globe,uID);
}
//客户端实现组
void CTest3Dlg::OnButton2() 
{
  NClient::CGlobe g_globe ;
  //...
  UINT uID = 0 ;
  //...
  Init(g_globe,uID);
}