classmSingleObj{private:staticshared_ptr<mSingleObj>instance;stringdescription="this is single instance object";// private constructor so that we can not create an instancemSingleObj(){}// private copy constructor and assignment operator//  previous version of c++mSingleObj(constmSingleObj&){}mSingleObj&operator=(constmSingleObj&){}// move constructor and move assignment operator// >= c++11 we can deletemSingleObj(mSingleObj&&)=delete;mSingleObj&operator=(mSingleObj&&)=delete;public://the only one way to to get objectstaticshared_ptr<mSingleObj>getInstance(){returninstance;}voiddisplay(){cout<<description<<endl;}~mSingleObj(){cout<<"Destructor called only one..."<<endl;}};//static object need to be initialized outside the class definationshared_ptr<mSingleObj>mSingleObj::instance(newmSingleObj());voidtestSingletonObj(){shared_ptr<mSingleObj>sObj=mSingleObj::getInstance();sObj->display();shared_ptr<mSingleObj>other_sObj=mSingleObj::getInstance();other_sObj->display();//check whether objects are the samecout<<"(sObj) Address of managed object: "<<sObj.get()<<std::endl;cout<<"(other_sObj) Address of managed object: "<<other_sObj.get()<<std::endl;}