I always write a simple console program to for testing, just like “Hello World” because it is easy. I was once and, maybe even now am, obsessed with those Linux commands that can be used to operate the computer.
It simply starts with the command action, always a verb, then with an option. It looks miraculous.
However, today, having seen some Windows console programs code. I found that this is the simple program that reads different args on the command line.
Great things are made of small pieces.