C++ How to Program, 10/e

8.8 Pointer Expressions and Pointer Arithmetic

This section describes the operators that can have pointers as operands and how these operators are used with pointers. C++ enables pointer arithmetic—a few arithmetic operations may be performed on pointers. Pointer arithmetic is appropriate only for pointers that point to built-in array elements.

A pointer may be incremented (++) or decremented (--), an integer may be added to a pointer (+ or +=) or subtracted from a pointer (- or -=), or one pointer may be subtracted from another of the same type—this particular operation is appropriate only for two pointers that point to elements of the same built-in array.

Portability Tip 8.3

Most computers today have four-byte or eight-byte integers. Because ...