Okay, I've been working on 1-13.
Once I broke it down into tasks, perhaps it isn't that difficult.
I have, perhaps, broken it down further than I needed to, but doing so helped me wrap my mind around the process I want the computer to do.
Now what I have is a program that runs, accepts input, and then exits, without printing my bars, and without any clues to what's going wrong.
I have a function that prints the bars, and it works, as long as I hardcode input into it.
So I built a "Project" in Xcode, hoping to use the debugger to run the program and find the problems.
I am now researching how to use the debugger; I don't understand what it's telling me. I don't know what the registers are, I don't know how to track my variables while I type input into the running program, it's like sitting in a big, powerful diesel locomotive, and not knowing where the start button is. You know you're surrounded with options, but none of them are turned on.
So if any of you have suggestions about a tutorial or ultra-basic instructions for using the Debugger in Xcode, I would be very interested in reading it.
Thank you, yet again.