Programming in Objective-C, Sixth Edition

Arrays

The Objective-C language enables the user to define a set of ordered data items known as an array. This section describes how to define and manipulate arrays. Later sections illustrate how arrays work together with functions, structures, character strings, and pointers.

Suppose you wanted to read a set of grades into the computer and then perform some operations on these grades, such as rank them in ascending order, compute their average, or find their median. In the process of ranking a set of grades, you cannot perform such an operation until you enter every grade.

In Objective-C, you can define a variable called grades that represents not a single value of a grade, but an entire set of grades. You can then reference each element of ...