#include <functional>
#include <iomanip>
#include <istream>
#include <ostream>
#include <string>

void test(std::istream& is, std::ostream& os) {
    struct xstr : std:: string {};
    xstr x;

    is >> std::get_money(x);
    os << std::put_money(x);

    long double y{};
    auto ref_y = std::ref(y);
    is >> std::get_money(ref_y);
    os << std::put_money(ref_y);
}