#include int main(int argc, char *argv[]) { argparse::ArgumentParser program("test"); program.add_argument("--color") .default_value>({"orange"}) .append() .help("specify the cat's fur color"); try { program.parse_args( argc, argv); // Example: ./main --color red --color green --color blue } catch (const std::runtime_error &err) { std::cerr << err.what() << std::endl; std::cerr << program; std::exit(1); } auto colors = program.get>( "--color"); // {"red", "green", "blue"} std::cout << "Colors: "; for (const auto &c : colors) { std::cout << c << " "; } std::cout << "\n"; }