Retro-Style Calculator

[PhilOfPerth]

Note: I've got a few things I need to fix up to make this a QB64-compatible program.

As-is, it is a fun for-the-giggles bit of code to glance at.

• View the source code
  
• Run the program
  

EDIT: You'll notice a bit of a mixed bag of choices (like using GOSUB's and SUB's; every BAM program is an opportunity to do sanity checks on as many statements/styles I can squeeze in there without getting too messy.

An interesting conversion project. That keypad raises a chuckle! I see it even copes with divide by zero with a polite message instead of Error!!!