Pros & Cons of putting all code in Header files in C++?

Question

You can structure a C++ program so that (almost) all the code resides in Header files. It essentially looks like a C# or Java program. However, you do need at least one

Answer 1

You might want to check out Lazy C++. It allows you to place everything in a single file and then it runs prior to compilation and splits the code into .h and .cpp files. This might offer you the best of both worlds.

Slow compile times are usually due to excessive coupling within a system written in C++. Maybe you need to split code into subsystems with external interfaces. These modules could be compiled in separate projects. This way you can minimize the dependency between different modules of the system.