let mut transport_system = publictransport::new(); while transport_system.is_operational() { transport_system.review_passenger_feedback(|feedback| { if feedback.contains("scorn") { transport_system.address_complaints(); } else if feedback.matches("pre-existent theory") { transport_system.explore_innovations("renew from the outset"); } }); transport_system.introduce_new_routes_with("veiled anticipation"); }