最简单的单例模式
//单例模式#include <iostream>using namespace std;class Singleton{public: static Singleton* Instance(); protected: Singleton() {} private: static Singleton* _instance;};Singleton* Singleton::_instance = 0;Singleton* Singleton::Instance(){ if (_instance == 0) { _instance = new Singleton(); cout << "Singleton new" << endl; } return _instance;}int main(){ for (int i=0; i<10; i++) { Singleton* obj = Singleton::Instance(); } return 0;}
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