目錄

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基本概念

代碼與實例

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基本概念

組合/聚合的好處：優先使用對象的組合/聚合將有助于你保持每個類被封裝，并被集中在單個任務上。這樣類和類的繼承層次會保持較小規模，并且不太可能增長為不可控制的龐然大物。

橋接模式（Bridge），將抽象部分與實現部分分離，使它們都可以獨立的變化。

橋接模式的核心意圖就是把這些實現對立出來，讓它們各自變化。這就使得每一種實現的變化不會影響其他實習。

UML圖如下（來源大話設計模式）

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代碼與實例

程序運行截圖如下：

源碼如下：

Head.h

#ifndef HEAD_H #define HEAD_H#include <list> #include <string> #include <iostream> using namespace std;//手機軟件 class HandSetSoft{public:virtual void run();virtual ~HandSetSoft();protected:HandSetSoft();HandSetSoft(HandSetSoft &h);HandSetSoft &operator = (HandSetSoft &t);string m_name; };//手機游戲 class HandSetGame : public HandSetSoft{public:HandSetGame(const string &name);~HandSetGame();void run(); };//手機通訊錄 class HandSetAddressList: public HandSetSoft{public:HandSetAddressList(const string &name);~HandSetAddressList();void run(); };//手機品牌 class HandSetBrand{public:void addHandSetSoft(HandSetSoft *h);virtual void run();virtual ~HandSetBrand();protected:HandSetBrand();HandSetBrand(HandSetBrand &h);HandSetBrand &operator = (HandSetBrand &t);list<HandSetSoft*> m_soft; };//手機品牌N class HandSetBrandN: public HandSetBrand{public:~HandSetBrandN();void run(); };//手機品牌M class HandSetBrandM: public HandSetBrand{public:~HandSetBrandM();void run(); };#endif

Head.cpp

#include "Head.h"void HandSetSoft::run() {}HandSetSoft::HandSetSoft() {}HandSetSoft::HandSetSoft(HandSetSoft &h) {}HandSetSoft::~HandSetSoft() {cout << "HandSetSoft::~HandSetSoft()" << endl; }HandSetSoft& HandSetSoft::operator=(HandSetSoft &t) {return HandSetSoft(); }HandSetGame::HandSetGame(const string &name) {m_name = name; }HandSetGame::~HandSetGame() {cout << "HandSetGame::~HandSetGame()" << endl; }void HandSetGame::run() {cout << "運行手機游戲 ---- " << m_name << endl; }HandSetAddressList::HandSetAddressList(const string &name) {m_name = name; }HandSetAddressList::~HandSetAddressList() {cout << "HandSetAddressList::~HandSetAddressList()" << endl; }void HandSetAddressList::run() {cout << "運行手機通訊錄 ---- " << m_name << endl; }void HandSetBrand::addHandSetSoft(HandSetSoft *h) {m_soft.push_back(h); }void HandSetBrand::run() {}HandSetBrand::HandSetBrand() {}HandSetBrand::HandSetBrand(HandSetBrand &h) {}HandSetBrand::~HandSetBrand() {cout << "HandSetBrand::~HandSetBrand()" << endl; }HandSetBrand & HandSetBrand::operator=(HandSetBrand &t) {return HandSetBrand(); }HandSetBrandN::~HandSetBrandN() {cout << "HandSetBrandN::~HandSetBrandN()" << endl;for(list<HandSetSoft*>::iterator i = m_soft.begin(); i != m_soft.end(); i++){delete (*i);}m_soft.clear(); }void HandSetBrandN::run() {for(list<HandSetSoft*>::iterator i = m_soft.begin(); i != m_soft.end(); i++){(*i)->run();} }HandSetBrandM::~HandSetBrandM() {cout << "HandSetBrandM::~HandSetBrandM()" << endl;for(list<HandSetSoft*>::iterator i = m_soft.begin(); i != m_soft.end(); i++){delete (*i);}m_soft.clear(); }void HandSetBrandM::run() {for(list<HandSetSoft*>::iterator i = m_soft.begin(); i != m_soft.end(); i++){(*i)->run();} }

main.cpp

#include "Head.h"int main(int *argc, int *argv){HandSetBrand *band1 = new HandSetBrandN;band1->addHandSetSoft(new HandSetGame("王者榮耀"));band1->addHandSetSoft(new HandSetGame("吃雞"));band1->addHandSetSoft(new HandSetGame("賽爾號"));band1->addHandSetSoft(new HandSetAddressList("流氓公司出的"));band1->addHandSetSoft(new HandSetAddressList("好用的軟件"));band1->run();delete band1;cout << endl << "---------------華麗的分割線---------------" << endl << endl;HandSetBrand *band2 = new HandSetBrandM;band2->addHandSetSoft(new HandSetGame("QQ飛車"));band2->addHandSetSoft(new HandSetAddressList("流氓公司的"));band2->run();delete band2;getchar();return 0; }

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