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CS201 - Homework - Assignment 1 - Solved
In this homework, you will implement a flight reservation system for an airline company, which operates multiple flights. Each flight has a unique flight number and is operated with an aircraft that may have a different seating plan. According to its type, an aircraft has a specified number of rows and number of seats in each row. (Although these numbers may change from one aircraft type to another, the number of seats is the same for every row in the same aircraft.) You will use dynamically allocated arrays for this purpose.
The reservation system that you will implement should have the following functionalities. The details are given below.
1. Add a flight
2. Cancel a flight
3. Show the list of flights
4. Show detailed information about a particular flight
5. Make a reservation
6. Cancel a reservation
7. Show a reservation
Add a flight: The reservation system will allow the user to add a new flight indicating its flight number, the number of rows in its aircraft, and the number of seats in its rows. Since the flight numbers should be unique within the system, you should check whether a flight with the same number exists. If it does, you should not allow the operation and display a warning message. You should also check if the number of rows in its aircraft, and the number of seats are positive. Otherwise, you should add the flight and display a message. At the time of adding a flight, you should allocate its seats all of which should be available for reservation. (Please see the code given below and its output for the format of the output.)
Cancel a flight: The reservation system will allow the users to cancel an existing flight indicating its flight number. If there exists no flight with the specified number, you should display a warning message. If the flight exists, you should delete it from the reservation system and cancel all of the reservations that were made for this flight. You should also display a message that the flight has been canceled. (Please see the code given below and its output for the format of the output.)
Show the list of flights: The reservation system will allow the user to see all of their flights within the reservation system. For each flight, you should output the flight number together with the number of its available seats. (Please see the code given below and its output for the format of the output.)
Show detailed information about a particular flight: The reservation system will allow the user to enter a flight number and see the availability of its seats. If there exists no flight with the specified number, you should display a warning message. If the flight exists, you should display the seats in the following format where “o” represents an available seat and “x” represents an occupied seat. Note that in the example below, the aircraft has 5 rows and 6 seats in each of its rows.
A 1 x
B x
C D E o o x
F x
2 o
o
o x o
x
3 o
o
o o x
x
4 o
o
o o o
o
5 x
o
o o x
o
Make a reservation: The reservation system will allow the user to make a reservation in a flight for a given number of passengers. For that, the user will specify the flight number and the number of passengers together with the selected seat numbers. The seat numbers are specified using two arrays. The first array contains integers corresponding to the row numbers and the second array contains characters representing the seats of the corresponding rows. For example, if the user makes a reservation for three passengers and the selected seat numbers are 1A, 5C, and 4E, the first array will contain 1, 5, and 4, and the second array will contain A, C, and E. (Please see the code given below and its output for more examples.)
This function makes a reservation only if the flight with a specified number exists and all of the selected seats are available. If there exists no flight with the specified number, you should display a warning message. Likewise, if even one of the selected seats is not available, you should display a warning message and return the error code -1.
If the flight exists and all of the selected seats are available, you should make this reservation by creating a unique reservation code, and by reserving the selected seats under this code. The reservation code should be unique not only for the specified flight but also for the entire reservation system. Thus, by using only this reservation code, you should identify the flight as well as the seats reserved under this code.
In this function, you may assume that the input arrays for the seat numbers contain only the valid values. For example, if the aircraft has 10 rows and 5 seats in each row, you may assume that the first array will contain the row numbers between 1 and 10, and the second array will contain the seat characters between A and E.
Cancel a reservation: The reservation system will allow the user to cancel a reservation by specifying the reservation code. If there exists no reservation under this code, you should display a warning message. If the reservation exists, you should cancel all of the seats reserved under this code and display the flight number and the seat numbers for which the reservation is canceled. (Please see the code given below and its output for the format of the output.)
Show a reservation: The reservation system will allow the user to see a reservation specifying its reservation code. If there exists no reservation under this code, you should display a warning message. If the reservation exists, you should display the flight number and the seat numbers selected for this reservation. (Please see the code given below and its output for the format of the output.)
Below is the required public part of the ReservationSystem class that you must write in this assignment. The name of the class must be ReservationSystem and must include these public member functions. The interface for the class must be written in a file called ReservationSystem.h and its implementation must be written in a file called ReservationSystem.cpp. You can define additional public and private member functions and data members in this class. You can also define additional classes in your solution. The interfaces of these classes should be put in their respective header files (i.e. MyClass.h), and their implementations should be put in their respective source files (i.e. MyClass.cpp). In addition to this, you are supposed to design and implement a Flight and a Reservation classes for which no details are provided. The interface for the Flight class must be written in a file called Flight.h and its implementation must be written in a file called Flight.cpp. Similarly, the interface for the Reservation class must be written in a file called Reservation.h and its implementation must be written in a file called
Reservation.cpp. Finally, you will create a makefile that will compile all of your classes and generate an executable.
class ReservationSystem { public:
ReservationSystem();
~ReservationSystem();
void addFlight( const int flightNo, const int rowNo, const int seatNo ); void cancelFlight( const int flightNo );
void showAllFlights(); void showFlight( const int flightNo );
int makeReservation( const int flightNo, const int numPassengers,
const int *seatRow, const char *seatCol );
void cancelReservation( const int resCode ); void showReservation( const int resCode );
// ...
// you may define additional member functions and data members, if necessary.
};
Below is a test program that uses this class. The corresponding output is also given below.
}
R.showReservation(100);
R.showReservation(code1);
R.cancelReservation(300);
R.cancelReservation(code2);
R.showFlight(104);
R.showAllFlights();
R.cancelFlight(234);
R.showFlight(234);
R.showAllFlights();
R.cancelFlight(674); R.showAllFlights();
R.cancelFlight(104);
R.showReservation(code1); R.showAllFlights(); return 0;
OUTPUT OF THE EXAMPLE TEST CODE:
No flights exist
Flight 104 has been added
Flight 234 has been added
Flight 76 has been added
Flights currently operated:
Flight 104 (12 available seats)
Flight 234 (24 available seats)
Flight 76 (12 available seats)
Flight 104 already exists
Flights currently operated:
Flight 104 (12 available seats)
Flight 234 (24 available seats)
Flight 76 (12 available seats)
Flight 104 has 12 available seats
A B C
1 o o o
2 o o o
3 o o o
4 o o o
Your reservation code is 1
Flight 104 has 8 available seats
A B C
1 o x x
2 o o o
3 x x o
4 o o o
Flight 104 has 6 available seats
A B C
1 o x x
2 x o o
3 x x o
4 o o x
3A is not available
Flight 104 has 6 available seats
A B C
1 o x x
2 x o o
3 x x o
4 o o x
1B 3B are not available
Flight 104 has 6 available seats
A B C
1 o x x
2 x o o
3 x x o
4 o o x
Flights currently operated:
Flight 104 (6 available seats)
Flight 234 (24 available seats)
Flight 76 (12 available seats)
No reservations under Code 100
Reservations under Code 1 in Flight 104: 1B 1C 3A 3B
No reservations are found under code 300
Reservation for the seats 2A 4C is canceled in Flight 104
Flight 104 has 8 available seats
A B C
1 o x x
2 o o o
3 x x o
4 o o o
Flights currently operated:
Flight 104 (8 available seats)
Flight 234 (24 available seats)
Flight 76 (12 available seats)
Flight 234 and all of its reservations are canceled
Flight 234 does not exist
Flights currently operated:
Flight 104 (8 available seats)
Flight 76 (12 available seats)
Flight 674 does not exist
Flights currently operated:
Flight 104 (8 available seats)
Flight 76 (12 available seats)
Flight 104 and all of its reservations are canceled
No reservations under Code 1
NOTES ABOUT IMPLEMENTATION:
1. You ARE NOT ALLOWED to modify the given parts of the header file. You MUST use dynamically allocated arrays in your implementation. You will get no points if you use fixed-sized arrays, linked-lists or any other data structures such as vector/array from the standard library. However, if necessary, you may define additional data members and member functions.
2. You ARE NOT ALLOWED to use any global variables or any global functions.
3. Your code must not have any memory leaks. You will lose points if you have memory leaks in your program even though the outputs of the operations are correct. To detect memory leaks, you may want to use Valgrind which is available at http://valgrind.org.
4. Otherwise stated in the description, you may assume that the inputs for the functions (e.g., the seat numbers) are always valid so that you do not need to make any input checks. For example, the seat row number is always given as an integer that is between 1 and rowNo and the seat letter is always given as an uppercase letter that is between ‘A’ and the letter corresponding to seatNo (e.g., if seatNo is 7 then the uppercase letter should be between
‘A’ to ‘G’).
