#include<iostream> using namespace std; class Singleton { private: static bool instanceFlag; static Singleton *single; Singleton() { //private constructor } public: static Singleton* getInstance(); void method(); ~Singleton() { instanceFlag = false; } }; bool Singleton::instanceFlag = false; Singleton* Singleton::single = NULL; Singleton* Singleton::getInstance() { if(! instanceFlag) { single = new Singleton(); instanceFlag = true; return single; } else { return single; } } void Singleton::method() { cout << "Method of the singleton class" << endl; } int main() { Singleton *sc1,*sc2; sc1 = Singleton::getInstance(); sc1->method(); sc2 = Singleton::getInstance(); sc2->method(); return 0; }
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