Implement CLI application by editing main.cpp.
You may add new files to keep your code clean, if it is allowed in your challenge.
You can get arguments with ordinary C++ way, using int argc and char * argv[].
int main(int argc, char * argv[])
{
  // code to run
  return 0;
}You can use cout, printf, etc.
  cout << argv[0] << endlTo compile, we are using clang c++ command.
If you want to change compile option or etc, please edit codecheck.yml build section.
(If you change output filename, you have to change env/APP_COMMAND section too.)
You can build pure C application by switching compiler command from c++ to clang.