#include #include using namespace std; class Test { public: Test() { cout << "Hi From constructor" << endl; } Test(const string& s) { cout << s << endl; } void displayMethod() { cout << "Hi from method" << endl; } ~Test() { cout << "Bye From destructor" << endl; } }; int main() { cout << "*******Unique pointer*******" << endl; { unique_ptr uptr = make_unique(); uptr->displayMethod(); unique_ptr uptr1; //uptr1 = uptr;//this doesnot compile uptr1 = move(uptr); } cout << endl << endl; cout << "*******Shared pointer*******" << endl; { shared_ptr sptr = make_shared("Hi from Parameterized constructor"); cout << "Pointers associated is: " << sptr.use_count() << endl; { shared_ptr sptr1; sptr1 = sptr;//this is allowed cout << "Pointers associated is: " << sptr.use_count() << endl; } cout << "Pointers associated is: " << sptr.use_count() << endl; } cout << endl << endl; cout << "*******Weak pointer*******" << endl; { shared_ptr sptr = make_shared("Hi from Parameterized constructor"); cout << "Pointers associated is: " << sptr.use_count() << endl; { weak_ptr wptr1; wptr1 = sptr;//this is allowed cout << "Pointers associated is: " << sptr.use_count() << endl; cout << "Is weak pointer valid? : " << boolalpha << !wptr1.expired() << endl; } cout << "Pointers associated is: " << sptr.use_count() << endl; } return 0; }

Different_Smart_Pointers