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String output and input
We will now examine some high-level file functions for reading strings
from and writing strings to streams. The two string output methods we
will examine (puts and fputs) are very safe to use, but
the input methods run from the antiquated and very dangerous gets
to the safer fgets, to getline and getdelim, two
GNU-specific extensions to the C language that are extremely safe to
use.
It is important to use the safer and better GNU functions when you can.
However, you will probably still want to learn how to read and
understand older (but still free) code that is unsafe (perhaps to update
it and make it safe), so this book describes functions like gets
despite the fact that they are unsafe.