Been doing clean-up and found this thread. I was planing to respond but
forgot to mark it. I like to think that planing is everything. I am not
alone, has a lot to do with any engineering project. For this reason I
would rather not talk language but procedure tools. One tool that will
help you with examples is one of the many UML tools.

I have used ArgoUML, and Umbrello from the repository. Most
instructional videos and courses will work on any of the UML tools.
Manuals are there to be downloaded, and followed. Some will spit out
code for C, C++, Java, Python, and many other languages. Many of these
tools will help you reverse engineer code to help you understand it.
UML is not without a learning curve, but well worth the effort to learn
it, and use.

But that's not all. UML can help you build organizational charts for
almost any business model. Truly an all around elegant solution.