wThe
delete operator frees up the memory allocated through new. To do so, the syntax is as in the
example.
delete ptr;
After
deleting a pointer, it can be a good idea to reset it to point to NULL.
w
wNULL is a standard
compiler-defined statement that sets the pointer to
point to, literally, nothing. By doing this, you minimise the potential for doing something foolish with the pointer.