// This class looks fine right?? It compiles so it must be right?? // Are there any key words missing? #include class Base { public: Base() { std::cout << "Base()" << std::endl; x = new int; } virtual ~Base() { std::cout << "~Base()" << std::endl; delete x; } void fn() { std::cout << "Base::fn()" << std::endl; } virtual void fn2() { std::cout << "Base::fn2()" << std::endl; } private: int *x; }; class D1 : public Base { public: D1() { std::cout << "D1()" << std::endl; y = new int; } ~D1() { std::cout << "~D1()" << std::endl; delete y; } void fn() { std::cout << "D1::fn()" << std::endl; } void fn2() { std::cout << "D1::fn2()" << std::endl; } private: int *y; }; int main(int argc, char **argv) { Base *b = new Base; Base *dptr = new D1; b->fn(); dptr->fn(); delete b; delete dptr; return 0; }