In that case, you probably have a compiler on your computer right now. You can open the command line and type
which g++ and it will show you the path to your compiler (most likely
/usr/bin/g++). If that’s there, then any of Atom’s packages will work for you (you should take a look at
process-palette). They all have slightly different feature sets, but will all get you where you want to be. You just have to choose the interface that you enjoy most.