A pointer is an object which references another object.

• The referenced object may also be a pointer.
• int *foo; declares foo as a pointer to an int
• Can have the value NULL.
• void * is a generic pointer.
• unary & references an object
• unary * dereferences an object
• foo->bar is shorthand for (*foo).bar
• pointers to compatible types may be compared with == or !=
• pointers may be compared with NULL or 0
• pointers may be cast to void * and back