he new C++09
nullptr keyword designates an
rvalue constant that serves as a universal null pointer literal, replacing the buggy and weakly-typed literal 0 and the infamous
NULL macro.
nullptr thus puts an end to more than 30 years of embarrassment, ambiguity, and bugs. The following sections present the
nullptr facility and show how it can remedy the ailments of
NULL and 0.
The literal 0 (which is essentially of type int) also serves as a null pointer literal in C++. This kludge results in ambiguity and bugs.
Use the nullptr keyword instead of 0 to indicate a null pointer value.
