设计模式 Design Parttern ——桥模式Bridge

设计模式 Design Parttern ——桥模式Bridge

http://blog.csdn.net/leeidea

1:头文件

#ifndef _BRIDGE_H_VANEY_#define _BRIDGE_H_VANEY_#include <iostream>using namespace std;/******************************************************************名称 ：Bridge.h版本 ：1.00描述 ：演示桥模式的概念作者 ：[e-mail] http://blog.csdn.net/leeidea日期 ：2010年10月20日版权 ：[e-mail] http://blog.csdn.net/leeide******************************************************************//*官方解释：The Bridge pattern decouples an abstraction from its implementation, so that the two can vary independently.我的理解：类似房间装开关一样，开始开关都是一样的，最后开关的作用是在房子设计好以后才知道， 有电灯开关，电视开关等。*///抽象开关class CBaseSwitch{public:CBaseSwitch(){cout << "CBaseSwitch()" << endl;}virtual ~CBaseSwitch(){cout << "~CBaseSwitch()" << endl;}public://需要子类实现的方法virtual int TurnOn() = 0;virtual int TurnOff() = 0;};//电灯开关class CLightSwitch : public CBaseSwitch{public:CLightSwitch(){cout << "CLightSwitch()" << endl;}virtual ~CLightSwitch(){cout << "~CLightSwitch()" << endl;}public:virtual int TurnOn(){cout << "CLightSwitch TurnOn" << endl;return 1;}virtual int TurnOff(){cout << "CLightSwitch TurnOff" << endl;return 1;}};//电视开关class CTVSwitch : public CBaseSwitch{public:CTVSwitch(){cout << "CTVSwitch()" << endl;}virtual ~CTVSwitch(){cout << "~CTVSwitch()" << endl;}public:virtual int TurnOn(){cout << "CTVSwitch TurnOn" << endl;return 1;}virtual int TurnOff(){cout << "CTVSwitch TurnOff" << endl;return 1;}};//房间class CHouse{CBaseSwitch* _switch1;CBaseSwitch* _switch2;public:CHouse(CBaseSwitch* switch1,CBaseSwitch* switch2){_switch1 = switch1;_switch2 = switch2;cout << "CHouse(Parameter)" << endl;}CHouse(){cout << "CHouse()" << endl;}virtual ~CHouse(){if(_switch1)delete _switch1;_switch1 = 0;if(_switch2)delete _switch2;_switch2 = 0;cout << "~CHouse()" << endl;}public:void SetSwitch(CBaseSwitch* switch1,CBaseSwitch* switch2){_switch1 = switch1;_switch2 = switch2;cout << "SetSwitch" << endl;}void TurnOn(){_switch1->TurnOn();_switch2->TurnOn();cout << "TurnOn" << endl;}void TurnOff(){_switch1->TurnOff();_switch2->TurnOff();cout << "TurnOff" << endl;}};#define C_API extern "C"//用户C_API int UsingBG();#endif

 

2:源文件

#include "Bridge.h"C_API int UsingBG(){CLightSwitch* switch_light = new CLightSwitch();CTVSwitch* switch_tv = new CTVSwitch();CHouse* house = new CHouse();//设置具体的开关类型house->SetSwitch(switch_light,switch_tv);house->TurnOn();house->TurnOff();//设置具体的开关类型house->SetSwitch(switch_tv,switch_light);house->TurnOn();house->TurnOff();return 1;}

 

3:用户文件main.c

extern int UsingBG();//系统默认入口int _tmain(int argc, _TCHAR* argv[]){ return UsingBG();}