Redirecting input from file

[Old Wolf]

And, to continue, trying to do a simple reports pgm in C is just asking
to run into all the "C gotchas" - seg faults, undefined behavior, etc,
etc, for no good reason, when there are existing tools that have already
taken care of this stuff.

Agree in general, although if you are already good
at C then there is nothing wrong with using C for
the task. Some of the advantages of C over AWK are
a faster execution time (no need to invoke a new
copy of the shell), and it is not prone to break
when run in different versions of awk (awk? nawk?
oawk? gawk? mawk?)