Author: Stan Eisenstat
Subject: Re: [Cs223] Error handling
Date: Tuesday, 14 Apr 2020, 08:05:02

    > Message Posted By: Unknown
    >
    > What is the difference between printf(...) followed by exit(), and
    > fprintf(stderr, ...)?

The first writes to the standard output and exits; the
second writes to the standard error (and exits?).
=====

    > Must we do the latter?

As stated in the specification, Nine20

  2. Nine20 verifies that the command-line arguments are valid, e.g.,
     ...
     and write a one-line error message to stderr and immediately exit otherwise.

--Stan-