try2.cpp

#include "CLI/CLI.hpp"


int main (int argc, char** argv) {

    CLI::App app("K3Pi goofit fitter");

    std::string file;
    CLI::Option* opt = app.add_option("-f,--file,file", file, "File name")
        ->required()->group("Important");
    
    int count;
    CLI::Option* copt = app.add_flag("-c,--count", count, "Counter")
        ->required()->group("Important");

    double value;// = 3.14;
    app.add_option("-d,--double", value, "Some Value")
        ->group("Other");

    try {
        app.run(argc, argv);
    } catch (const CLI::Error &e) {
        return app.exit(e);
    }

    std::cout << "Working on file: " << file
              << ", direct count: " << app.count("--file")
              << ", opt count: " << opt->count()
              << std::endl;
    std::cout << "Working on count: " << count
              << ", direct count: " << app.count("--count")
              << ", opt count: " << copt->count()
              << std::endl;
    std::cout << "Some value: " << value << std::endl;

    return 0;
}