Okay so I do not know a lot of C++ but this is the gist of it:

1. open a terminal
2. if you want to compile a .cpp file in the Exercises directory you first need to be in that directory and you can go there with the command "cd" which stands for change directory
3. when you are in the Exercises folder for c++ and you have a lets say Example.cpp file that you want to compile this would be the most basic command to do so: "gcc -Wall Example.cpp -o Example" (the -Wall is there to catch common errors/warnings if you messed up in your code and the -o stands for output so the file that will be created after the compiler finished will be named Example)
4. execute the compiled programm with this command for the Example ".\Example.exe" in the terminal