CareerCup

1. Create a class for the vehicle:

public class vehicle{
       private String vehicle_num;
       private String OwnerName;
       private long ownerCellno;
       private String inTime;
       private String outTime;
       //create the getters and setters for the above fields
    }

2. Create a HashMap:
HashMap<Vehicle, Integer> parkDetail = new HashMap<Vehicle, Integer>();
where the second Integer field is the parkingspot ID.
//This HashMap will keep the details of the occupied parking slots.

3. Create a Queue of Integer which will be used to track the free parking spots, when a parking spot gets free...add it to the queue....If a new vehicle has come den remove the corresponding entry from this queue and add it to hashMap.

For 4 wheeler and 2 wheeler, we can maintain two copies of HashMap and Queue as there will be different parking spots for both.

enum CarType{ car, mobile};
Class Vehicle{
CarType _type;
string owner;
int RestTime;

}
class ParkingLot{
int CarPosition;
int MotorPosition;

enum CarType{ car, mobile};
Class Vehicle{
CarType _type;
string owner;
int RestTime;

}
class ParkingLot{
int CarPosition;
int MotorPosition;

class Vehicle{}
class Car: public Vehicle {}
class Motor: public Vehicle{}
class Slot
{
Vehicle* pVehicle;
}

class Vehicle{}
class Car: public Vehicle {}
class Motor: public Vehicle{}
class Slot
{
Vehicle* pVehicle;
}

Some questions needs to be asked --- Are both expected to consume the same amount of space? (It may be desirable that a different parking lot or a different level or a selected area be designated for Motorcycle parking).
Other important point that needs consideration are duration of parking and payment, Type of parking spot (Regular, Valet or for Handicapped - More classes can be added).

union Vehicle
{
Car;
MotorCycle;
}
Hash<Vehicle> ParkingLot;

:P