1 #include <iostream> 2 #include <string> 3 #include <map> 4 using namespace std; 5  6 class Flyweight 7 { 8 public: 9     virtual void operation(int) = 0;10 };11 12 class ConcreteFlyweight : public Flyweight13 {14     void operation(int extrinsicState)15     {16         cout << "具体FlyWeight: " << extrinsicState << endl;17     }18 };19 20 class UnsharedConcreteFlyweight : public Flyweight21 {22     void operation(int extrinsicState)23     {24         cout << "不共享的具体FlyWeight: " << extrinsicState << endl;        25     }26 };27 28 class FlyweightFactory29 {30 private:31     map<string,Flyweight*> flyweights;32 public:33     FlyweightFactory()34     {35         flyweights["X"] = new ConcreteFlyweight();36         flyweights["Y"] = new ConcreteFlyweight();37         flyweights["Z"] = new UnsharedConcreteFlyweight();38     }39     Flyweight *getFlyweight(string key)40     {41         return (Flyweight *)flyweights[key];42     }43 };44 45 int main()46 {47     int state = 22;48     FlyweightFactory *f = new FlyweightFactory();49     50     Flyweight *fx = f->getFlyweight("X");51     fx->operation(--state);52     53     Flyweight *fy = f->getFlyweight("Y");54     fy->operation(--state);55 56     Flyweight *fz = f->getFlyweight("Z");57     fz->operation(--state);58 59     Flyweight *uf = new UnsharedConcreteFlyweight();60     uf->operation(--state);61 62     return 0;63 }64 //Result:65 /*66 具体FlyWeight: 2167 具体FlyWeight: 2068 不共享的具体FlyWeight: 1969 不共享的具体FlyWeight: 1870 */

 1 #include <iostream> 2 #include <list> 3 #include <string> 4 #include <map> 5 using namespace std; 6  7 class WebSite 8 { 9 public:10     virtual void use() = 0;11 }; 12 13 class ConcreteWebSite : public WebSite14 {15 private:16     string name;17 public:18     ConcreteWebSite(string name)19     {20         this->name = name;21     }22     void use()23     {24         cout << "网站分类: " << name << endl;25     }26 };27 28 class WebSiteFactory29 {30 private:31     map<string,WebSite*> wf;32 public:33      34     WebSite *getWebSiteCategory(string key)35     {36         if (wf.find(key) == wf.end())37         {38             wf[key] = new ConcreteWebSite(key);39         }    40         return wf[key];41     }42      43     int getWebSiteCount()44     {45         return wf.size();46     }47 };48 49 int main()50 {51     WebSiteFactory *wf = new WebSiteFactory();52 53     WebSite *fx = wf->getWebSiteCategory("good");54     fx->use();55     56      WebSite *fy = wf->getWebSiteCategory("产品展示");57     fy->use();58 59     WebSite *fz = wf->getWebSiteCategory("产品展示");60     fz->use();61 62 63     WebSite *f1 = wf->getWebSiteCategory("博客");64     f1->use();65 66     WebSite *f2 = wf->getWebSiteCategory("微博");67     f2->use();68 69     cout << wf->getWebSiteCount() << endl;70     return 0;71 }72 //Result:73 /*74 网站分类: good75 网站分类: 产品展示76 网站分类: 产品展示77 网站分类: 博客78 网站分类: 微博79 480 */