Pointers

A pointer is an object that holds the address of another object.
- A pointer holds the address of the object that it points to.
- All pointers occupy 4 bytes.
Declaring Pointers
- Type * after the type of object that it points to.
- Examples:
  - Pointer to int: int* pi;
  - Pointer to float: float* pf;
Null Pointer
- The constant NULL is the null pointer.
- NULL is a valid pointer, but it does not point to any object.
- NULL has numerical value 0.
Address Operator &
- The unary (pre-fix) operator & returns the address of an object.
- If i is an int, then &i is the address of i.

This page was last modified on Jan 19, 2001

URL: http://people.hsc.edu/faculty-staff/robbk/Coms262/Lectures/Pointers.html