Using a compiler
How to use a compiler. What can go wrong.
The operating system is the layer of software that drives the hardware of a computer and provides the user with a comfortable work environment. Operating systems vary, but most have a shell, or text interface. You use the GNU shell every time you type in a command that launches an email program or text editor under GNU.
In the following sections of this chapter, we will explore how to create a C program from the GNU shell, and what might go wrong when you do.