
output shown in Figure 11.12 if the file is found, and the output in Figure
11.13 if the file is not found.
11.3.2 Writing to Text Files
In the previous section, we learned how to read data from a text file. But
how did the data get into the file in the first place? It could be that some-
one put the data into the file using an editor, such as Notepad in Windows,
or vi, pico, or emacs in Unix. Typing data into a file is convenient when the
amount of data is small. But very often files contain a significant amount
of data, typically written to the file by a computer program. For instance, a
web server writes to log files to keep track of the visitors ...