定義：為其他對(duì)象提供一種代理以控制這個(gè)對(duì)象的訪問，也叫做委托模式。

　　咱們比作游戲，通俗講代理模式就是，一個(gè)主題虛基類派生出兩個(gè)子類，一個(gè)玩家類，實(shí)現(xiàn)相關(guān)操作，一個(gè)是代練類，代替執(zhí)行玩家相關(guān)操作，代練類對(duì)象有個(gè)指向玩家類對(duì)象的指針，可以通過調(diào)用代練類對(duì)象，實(shí)現(xiàn)玩家不登錄，游戲照樣打怪升級(jí)。。。。　　

using namespace std;
//游戲主題類
class Game
{
public:Game() {}virtual ~Game() {}virtual void begin_time() = 0;virtual void login() = 0;virtual void killBoss() = 0;virtual void upGrade() = 0;virtual void end_time() = 0;
};//游戲?qū)嵗?/span>
class RealGame : public Game
{
public:RealGame(string username, string password) {this->userName = username;this->password = password;}~RealGame() {}//上線virtual void begin_time() { printf("開始時(shí)間： 2017/3/20 19:34\n"); }//登錄virtual void login() { cout <<"用戶: " <<userName<<"登錄游戲"<< endl;}//打怪virtual void killBoss() { cout << userName << "打死領(lǐng)主\"錘王菠蘿丁！\"" << endl;}//升級(jí)virtual void upGrade() { cout << userName << "升級(jí)到89級(jí)！" << endl;}//下線virtual void end_time() {cout <<"2017/3/20 21:12 玩家"<< userName << "退出游戲" << endl;}private:string userName;string password;
};//游戲代練者
class Proxy : public Game
{
public:Proxy(string userName, string password){pRealGame = new RealGame(userName, password);}~Proxy() {delete pRealGame;pRealGame = nullptr;}virtual void begin_time() {pRealGame->begin_time();}virtual void login(){pRealGame->login();}virtual void killBoss(){pRealGame->killBoss();}virtual void upGrade(){pRealGame->upGrade();}virtual void end_time(){pRealGame->end_time();}private:RealGame *pRealGame;
};int main()
{Game *m_game = new Proxy("張三","******");m_game->begin_time();m_game->login();m_game->killBoss();m_game->upGrade();m_game->end_time();delete m_game;m_game = nullptr;
}

轉(zhuǎn)載于:https://www.cnblogs.com/Forever-Road/p/6591287.html

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