Automakers issue recalls to fix defects, or sometimes just to check for defects. When a model is recalled, the automaker contacts every owner of that model by mail, and asks him or her to bring his or her car to a dealer. The dealer replaces defective parts at no cost to the car owner.
C++ Pointer Operators. C++ provides two pointer operators, which are (a) Address of Operator & and (b) Indirection Operator *. A pointer is a variable that contains the address of another variable or you can say that a variable that contains the address of another variable is said to point to the other variable. A variable can be any data type including an object, structure or again pointer itself. The . (dot) operator and the -> (arrow) operator are used to reference individual members of classes, structures, and unions.
C++11 adds a null pointer constant called nullptr. The use of nullptr should be preferred over 0 or NULL. GCC just added a warning for the use of 0 as a pointer, so they are strongly encouraging you to use nullptr.or the operators and, two values of type std::nullptr_t shall compare as true. Comparing with or gives false. Comparing anything else with a value of type std::nullptr_t is unspecified. Comparing anything using != or == with nullptr gives true or false if it is not null or null respectively.