Learn C Programming - Second Edition

23

Using File Input and File Output

In the previous chapter, we introduced many basic file concepts as well as most of the file manipulation functions. We also demonstrated a simple way to open and close files.

In this chapter, we will put that knowledge to better use by developing programs to read and write to/from a sequential file. Our goal in this chapter is to accept input from a console or a file, sort each line in a file, and then write out the result, either to a console or to a file. We will find that there are several subtleties that we will need to address; we will also be using nearly every C skill we have learned so far.

The following topics will be covered in this chapter:

• Creating a template program to process filenames given ...