C Primer Plus, Fourth Edition

Key Concepts

When you need to store many items all of the same kind, the array might be the answer. C refers to arrays as derived types because they are built on other types. That is, you don't simply declare an array. Instead, you declare an array of int or an array of float, or an array of some other type. That other type can itself be an array type, in which case, you get an array of arrays, or a two-dimensional array.

It's often advantageous to write functions to process arrays; that helps modularize a program by locating specific tasks in specific functions. It's important to realize that when you use an array name as an actual argument, you're not passing the entire array to the function; you are just passing the address of the array; hence ...