text: #include <cstdlib>
  #include <iostream>
  
  int main(int argc, char ** argv)
  {
      if (argc < 2)
      {
          std::cerr << "ERROR: Please provide at least one name as argument." << std::endl;
          return EXIT_FAILURE;
      }
      for (int i = 1; i < argc; i++)
          std::cout << "Hello " << argv[i] << "!" << std::endl;
      return EXIT_SUCCESS;
  }
  