Parsing command-line arguments in C?

Question

I\'m trying to write a program that can compare two files line by line, word by word, or character by character in C. It has to be able to read in command line options

Answer 1

Docopt has a C implementation that I thought was quite nice: https://github.com/docopt/docopt.c

From a man-page standardized format describing command line options, docopt infers and creates an argument parser. This got started in python; the python version literally just parses the docstring and returns a dict. To do this in C takes a little more work, but it's clean to use and has no external dependencies.