What should a json file contain for a run configuration for my c++ file?

Hi! I am going through the examples from the book Beginning c++17 ... by Ivor Horton.

I want to run examples from this book. Code can be found here: https://github.com/Apress/beg-cplusplus17

What should the .json contain in order to run these c++ files?

Should it contain something extra for debugging?

Is there a general description of a json file for c++ coding?