#pragma once

//观察者模式的观察者接口
class CObserver
{
public:
     CObserver(void);
     virtual ~CObserver(void);
     virtual void Update(){};
     void SetVal1(double val){m_Val1 = val;};
     double GetVal1(){return m_Val1;};
private:
     double                   m_Val1;//主题可以给观察者传递一些信息
};