abhishek18124/LPPP26FEB ? reverse-engineered prompt

Build me a simple C++ practice repo for my lecture notes, with one folder for each lecture from 4 through 40. I want each lecture folder to contain a few small, runnable example programs that match the topic of that class, so I can open any folder and quickly study or test the code.

Keep it clean and easy to follow, with beginner friendly code and clear comments where helpful. If any lecture folder is empty, fill it with a sensible example so the whole set feels complete. I also want the project to be easy to compile and run from the command line, and if you think it helps, add a short README that explains how to use the folders and run the examples.

If you need to check anything current about the best way to structure the code or compile it, look up the docs online first.