SittingCar
The class SittingCar represents passenger cars with seats in a train ticket reservation
system. Each sitting car has rows of seats, which are numbered starting from one upwards.
Each row has a number of seats, identified by letters starting from 'a'.
When created, all the seats in a sitting car are unreserved. This changes as reservations are made.
In this simple implementation, no data is stored about who has reserved which seat.
- Value parameters:
- numberOfRows
the number of seat rows in the car
- seatsPerRow
the number of seats in each row
Value members
Concrete methods
Returns a Boolean value indicating whether the indicated seat is reserved or not.
Returns a Boolean value indicating whether the indicated seat is reserved or not.
- Value parameters:
- numberOfRow
a row number (valid number that is >=1)
- seat
a seat identifier (valid small letter, from 'a' onwards)
Returns the number of free, unreserved places (seats) in this car.
Returns the number of free, unreserved places (seats) in this car.
Returns the number of places (seats) this car has for passengers. This is a positive number.
Returns the number of places (seats) this car has for passengers. This is a positive number.
Reserves the indicated seat, if possible. The reservation is unsuccessful if the seat
was already reserved. In the latter case, the method returns false; it returns true otherwise.
Reserves the indicated seat, if possible. The reservation is unsuccessful if the seat
was already reserved. In the latter case, the method returns false; it returns true otherwise.
- Value parameters:
- numberOfRow
a row number (valid number that is >=1)
- seat
a seat identifier (valid small letter, from 'a' onwards)
Reserves places (seats) for a group of people whose size is indicated by the parameter. For a sitting car, a group reservation means that the whole group must get adjacent seats in the same row.
Reserves places (seats) for a group of people whose size is indicated by the parameter. For a sitting car, a group reservation means that the whole group must get adjacent seats in the same row.
Where it would be possible to make the reservation in many different ways, the smallest possible row number and first (alphabetically) possible seat identifiers are selected.
If it is not possible to reserve suitable seats for all members of the group, no places are reserved at all. The return value of this method indicates whether the seats were reserved or not.