Not long ago I came across an interesting project called Cling, a C++ interpreter that can work interactively from the console, among other things. You can get acquainted with the project at the link: https://github.com/root-project/cling
Installation for Ubuntu is very simple – download the archive for the required version, unpack it, go to the bin folder and run cling in the terminal.
Below is an example of loading the library FlameSteelCore, initializing the object, printing the id:
C++ language interpreter – Cling
