darmao的博客

懒汉：（非到用的时候才构造出来一个对象） class Sigleton { private: Sigleton() { this->id=0; } static Sigleton *sigleton; static pthread_mutex_t lock; public: static Sigleton* getIns...

简单工厂模式 class SingleCore { public: virtual void Show()=0; }; class SingleCoreA:public SingleCore { public: void show() { cout<<"coreA"<<endl; } }; class SingleCor...

#include <iostream> #include <vector> #include <sstream> #include <algorithm> #include <list> using namespace std; class Observer { public: Observer(){} virtual ...