There are so many features not available in C++11. The latest version available is C++11. Also I don't see an option to choose the compiler. Is there a way to change clang to gcc?
Try using the shell as @a5rocks said. To save yourself the trouble of typing the whole command the whole time, make a blank file called
main and fill the file with
g++ -std=c++17 *.cpp -o run.o chmod 744 /home/runner/run.o /home/runner/run.o
-std=c++17 sets the language standard to C++17, you can change it to
-std=c++14 etc to use C++14 or whatever else)
to run, open the shell and type