ohaluminum/cosc1430_finalpractice2

Inheritance

COSC1430_FinalPractice2

Inheritance

❗❕ An important point is Downcatsing!!

🌿 Details about downcasting example is in addVehicle() function!

In this exercise, you are implementing a parking garage that can park different vehicles. You will need the following three classes to finish this exercise.

Vehicle class:

private:

• A string member variable, named regid

public:

• A constructor with one parameter that sets regid

• An accessor and a mutator for regid

• An empty virtual destructor

• A print function that outputs the registration information of the vehicle in the following format.

cout << "Vehicle Registration: " << /*var name*/ << endl;

Car class:

This class inherits from the class Vehicle (using public inheritance) and adds the following members.

private:

• A string variable, named color

• A string variable, named make

• A string variable, named model

• An integer, named year

public:

• A constructor with parameters: string regid, string color, int year, string make, and string model.

• Getters/accessors and setters/mutators of the above member variables

• Overwrite the print function to show the information of the car in the standard output using the following cout statement:

cout << "Car Registration: " << /*var name*/ << ", Color = " 
     << /*var name*/ << ", Year = " << /*var name*/ << ", Make = " 
     << /*varname*/ << ", Model = " << /*var name*/ << endl;

Garage class:

This class uses an array to store a number of vehicles and supports the addition and removal of a vehicle from the array.

private:

• A 1D array of the pointer type of Vehicle with fixed size of 100, named vehicles

• A string variable, named location, to store the address of the garage

• An integer, named numOfVehicles, to store the current numbers of vehicles in the garage

public:

• A constructor with a parameter of type string representing the location of the garage.

• A destructor that proper releases the memory of the vehicle/car objects associated with the elements in the pointer array

• Overload the operator == (comparing the attribute location).

If the information stored in location is identical for both garage objects, return true; otherwise, return false.

• Create a boolean function called addVehicle

It receives a reference to a Vehicle object and a boolean variable to mark whether the Vehicle object passed in is a car or not (true for a Car object and false for a Vehicle object).

This function should check whether the garage is full or not, (numOfVehicles is equal to or greater than 100 or not) before adding a new vehicle. If there is room, add the object to the first available position in the array.

Note that new dynamic memory needs to be allocated correctly (for a Vehicle object or for a Car object based on the value of the boolean variable passed in). If the operation is successful, addVehicle will return true, false otherwise.

The following functions are provided to you

• The getters/accessors for location and numOfVehicles.

• A function called removeVehicle, that receives a string with the regid, and returns a boolean value.

• A print function to show the information about all the vehicles in the garage

Note that the information that will be printed out depends on the type of objects that the current pointer element is associated with.

That is, if it is a Car object, the print function of the Car class should be called, otherwise, the print function of Vehicle class should be called.

Hint: a small but crucial addition to the Vehicle class is necessary to achieve this.