Inspired by the UNIX wc command.
Count characters, words, and/or lines from an input stream. Reads from standard input if no filename is given on the command-line.
A Makefile is provided for building the program from the project's root directory (using gcc with -std=gnu99 compiler flag).
- C-Programming A Modern Approach - K. N. King (2e): Chapter 22
- https://www.gnu.org/software/libc/manual/html_node/Using-Getopt.html