(1) entry flight information (flight data can be stored in a data file, data structure, all self-specific data) (2) query to a route information (such as, enter the flight number, query time take-offs and landings, take-off city, passes through the city and finally arrived in the city, flight fares, discount fares to determine whether Mancang flights, the number of remaining votes. Another example is the importation of take-off city or arrival city, flight inquiries situation) (3) amend the flight information, flight information when changes in flight data files should be amended. (4) complete the booking operations (there is a booking can be data files, the structure of their set), if the flight has been no vote, can provide relevant, other options for the user to choose flight information (5) complete refund operations after refunds to amend the relevant data files

第四题.c

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