Built-in array element
b can alternatively be referenced with the pointer expression
*( bPtr + 3 )
3 in the preceding expression is the offset to the pointer. When the pointer points to the beginning of a built-in array, the offset indicates which built-in array element should be referenced, and the offset value is identical to the subscript. This notation is referred to as pointer/offset notation. The parentheses are necessary, because the precedence of
* is higher than that of
+. Without the parentheses, the preceding expression would add
3 to a copy of
*bPtr’s value (i.e.,
3 would be added to
b, assuming that
bPtr points to the beginning of the built-in array).
Just as the built-in array element can be referenced ...