ABSTRACT
The previous chapter extended the depth of your knowledge in libraries so that you have the capability to do more inside of your programs. Now we are going to switch gears and start looking at what goes into constructing data structures and writing some basic libraries. Most of the time you are writing programs, you will use pre-existing libraries. After all, they have been written by experienced people who put a lot of time and effort into tuning them so that they are flexible and efficient.
