- have an IDE / text editor can set in cli for the file to be launched/done by compiler
- the cli must has option compile and stop, to have shortest read-execute cycle just to test syntax, have it full to link, so can print to test full
- have a new directory,
- set it 0 permission means everyone, or 777 on Linux
- highly recommended on Ram that is it's virtual disk
- have a c++ source there
- this way only it can simulate REPL - read execute print loop of interpreter act
- enjoy your little experiments of well-written c++ text by this EREPL - Edit REPL