Question

How to capture a parameter after some string in command line?

./executable.out -apps path_to_out

In the above code I want to store path_to_out in a string variable. What is the efficient way of doing that?

Answer 1

It kind of depends what kind of options you want. If you are willing to have only single-letter options, you can use the C library function getopt to parse the command line. If you would like long options (e.g., --apps), you can use getopt_long, but this is a GNU extension that will not port well. If you want really, really fancy option parsing, you can use something like GLib.

Of course, you can just roll your own, iterating over the arguments from 1 to argc and, when you encounter -apps, check that i+1 < argc and grab the next argument.