设计模式之命令模式，C++实现
命令模式应该是应用比较广泛的模式
各种编辑操作都会用到，可以将实现与操作分离，
解析用户操作为一部分代码，实现用户操作的目的又封装到另外一个地方，或者是命令模式的派生类或者是对象自身内部
《大话设计模式》中的贴图
代码：
// Command.cpp : Defines the entry point for the console application.//#include "stdafx.h"#include <string>#include <iostream>#include <vector>// 命令模式（Command）：将一个请求封装为一个对象，从而使你可以用不同的请求对客户// 进行参数化，对请求排队或记录请求日志，以及支持可撤销的操作。// 就是将命令的产生于命令的执行分离，这样就能生成一个命令队列class Receiver{public:Receiver(const std::string &strName){m_strName = strName;}std::string m_strName;};class Cmd{public:Cmd(Receiver *pRcv): m_pReceiver(pRcv){;}virtual ~Cmd(){;}virtual void Execute() = 0;protected:Receiver*m_pReceiver;};class MoveCmd : public Cmd{public:MoveCmd(Receiver *pRcv): Cmd(pRcv){}void Execute(){printf("Move %s\n", m_pReceiver->m_strName.c_str());}};class RotateCmd : public Cmd{public:RotateCmd(Receiver *pRcv): Cmd(pRcv){}void Execute(){printf("Rotate %s\n", m_pReceiver->m_strName.c_str());}};class CmdMgr{public:void SetCommand(Cmd *pCmd){m_VecCmd.push_back(pCmd);}void ExecuteCommand(){std::vector<Cmd*>::iterator iter = m_VecCmd.begin();for (; iter != m_VecCmd.end();){Cmd* pCmd = (*iter);pCmd->Execute();if (pCmd){delete pCmd;pCmd = NULL;}iter = m_VecCmd.erase(iter);}}private:std::vector<Cmd*> m_VecCmd;};int _tmain(int argc, _TCHAR* argv[]){Receiverrecvr("Cube");CmdMgrmgr;Cmd* pMoveCmd = new MoveCmd(&recvr);Cmd* pRotateCmd = new RotateCmd(&recvr);mgr.SetCommand(pMoveCmd);mgr.SetCommand(pRotateCmd);mgr.ExecuteCommand();return 0;}