ParkingAllocator
Problem description
Create an automated ticketing system that allows customers to use a multi-storey parking lot that can hold up to 'n' cars without human intervention. When a car enters my parking lot, a ticket is issued to the driver. Each parking slot is given a number starting at 1 increasing with increasing distance from the entry point in steps of one.
The ticket issuing process includes us documenting the registration number (number plate) and the colour of the car and allocating an available parking slot to the car before actually handing over a ticket to the driver (we assume that our customers are nice enough to always park in the slots allocated to them). The customer should be allocated a parking slot which is nearest to the entry. At the exit the customer returns the ticket which then marks the slot they were using as being available. Due to government regulation, the system should provide me with the ability to find out:
- Registration numbers of all cars of a particular colour.
- Slot number in which a car with a given registration number is parked.
- Slot numbers of all slots where a car of a particular colour is parked.
We interact with the system via a simple set of commands which produce a specific output. The system should allow input in two ways:
- It should provide us with an interactive command prompt based shell where commands can be typed in
- It should accept a filename as a parameter at the command prompt and read the commands from that file
To run the program:
$ ./parking_lot file_inputs.txt
Input (contents of file):
create_parking_lot 6
park KA-01-HH-1234 White
park KA-01-HH-9999 White
park KA-01-BB-0001 Black
park KA-01-HH-7777 Red
park KA-01-HH-2701 Blue
park KA-01-HH-3141 Black
leave 4
status
park KA-01-P-333 White
park DL-12-AA-9999 White
Output (to STDOUT):
Created a parking lot with 6 slots
Allocated slot number: 1
Allocated slot number: 2
Allocated slot number: 3
Allocated slot number: 4
Allocated slot number: 5
Allocated slot number: 6
Slot number 4 is free; [KA-01-HH-7777 Red]
Slot# Registration# Colour
1 KA-01-HH-1234 White
2 KA-01-HH-9999 White
3 KA-01-BB-0001 Black
4 - Available -
5 KA-01-HH-2701 Blue
6 KA-01-HH-3141 Black
1 Slot(s) Available.
Allocated slot number: 4
Sorry, parking lot is full