我该如何正确对齐？

Question

std::ostream& sdds::operator<<(std::ostream & os, Reservation _nv_reservation) {
    cout << "Reservation" << _nv_reservation._v_reservation_id << ":";
    cout.width(10);
    cout.setf(ios::right);
    cout << _nv_reservation._v_reservation_name;

    return os;
}

我的结果不正确。我想使结果正确对齐（_v_reservation_name）。 _v_reservation_name是char*的{​​{1}}类型成员变量