Cross-Platform C++ GUI Library
Check out Dear ImGui or WxWidgets. You can also use a framework like Qt
Simple and Fast Multimedia Library
If you don’t mind writing the GUI from scratch, you can use a graphics library like SFML, or my personal favourite, SDL2.
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The C++ Core Guidelines are a set of tried-and-true guidelines, rules, and best practices about coding in C++
www.learncpp.com is a great place to start. Use https://en.cppreference.com/w/ as a language reference. Once you feel comfortable with the language, you can learn about the proper practices using the C++ Core Guidelines.
I’m missing the big picture
2 projects | reddit.com/r/cpp_questions | 24 Mar 2021
Tic tac toe ine c++ ?
2 projects | reddit.com/r/learnprogramming | 17 Dec 2022
2 projects | reddit.com/r/Cplusplus | 11 May 2022
Is there some kind of repository / collection of classes that are very universal, but don't fit into the original source?
11 projects | reddit.com/r/sfml | 5 Mar 2021
What are the state of C++ audio, 2D graphics and contract in C++23/26?
1 project | reddit.com/r/cpp | 8 Jan 2023