shubhamnarwade07/cpp-opps ? reverse-engineered prompt

Build me a clean C++17 repository for my OOP class that contains practical code and small scenario based programs for four units, plus separate code book style practice files for each unit.

I want the folder structure organized by unit, with each unit having its own examples and a mini project. The programs should cover the basics of classes and objects, inheritance, polymorphism, and files and streams, and they should feel like real world examples such as a student attendance system, payroll system, banking system, media player, and library management system. Please make the code beginner friendly, well commented, and easy to run from the command line on Windows, Linux, or macOS.

For the code book sections, add a set of small practice programs for each unit that demonstrate the main concepts clearly. Keep the implementations simple but complete, with proper input handling and example output. If anything needs current syntax or library details, look up the latest docs online before coding.