Problem Statement
I own a parking lot that can hold up to 'n' cars at any given point in time. Each slot is givens
a number starting at 1 increasing with increasing distance from the entry point in steps of
one. I want to create an automated ticketing system that allows my customers to use my
parking lot without human intervention.
When a car enters my parking lot, I want to have a ticket issued to the driver. 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. Please take a look at the example below, which includes all the commands
you need to support - they're self explanatory. The system should allow input in two
ways. Just to clarify, the same codebase should support both modes of input - we
don't want two distinct submissions.
- It should provide us with an interactive command prompt based shell where commands can be typed in
OR / AND
- It could be run with Unit test framework
Input and output formats are defined below, below format is expected from the program.
Either on console and / or assertions with Unit tests are required.
Input
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
registration_numbers_for_cars_with_colour White
slot_numbers_for_cars_with_colour White
slot_number_for_registration_number KA-01-HH-3141
slot_number_for_registration_number MH-04-AY-1111
Output :
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
Slot No. Registration No Color
1 KA-01-HH-1234 White
2 KA-01-HH-9999 White
3 KA-01-BB-0001 Black
5 KA-01-HH-2701 Blue
6 KA-01-HH-3141 Black
Allocated slot number: 4
Sorry, parking lot is full
KA-01-HH-1234, KA-01-HH-9999, KA-01-P-333
1, 2, 4
6
Not found