2.5 Zoo Learning Activity

2.5 Zoo Learning Activity — overview

Work through the user stories in order. Each story states the goal and acceptance criteria; its nested tasks retain the detailed implementation and verification steps.

1.Gather your resources

A Open the assignment resources

Feedback System Go to the completion checklist

Set up the checkpoint

2.Copy your 2.4 ending code, renaming both the folder and the Visual Studio solution file

A Verify the required change or observation

Check the result against this instruction: Copy your 2.4 ending code, renaming both the folder and the Visual Studio solution file

3.Build your solution and ensure it compiles without warnings or errors

A Verify the required change or observation

Check the result against this instruction: Build your solution and ensure it compiles without warnings or errors.

Construct employees, booths, and guests with their values

Problem

Currently the MainWindow is handling the instantiation of the employees, booth and guest AND assigning field values when it really should be the responsibility of the class to handle assigning those values.

Solution

You will instantiate the employees, booth and guest in the MainWindow and pass values into a constructor that will then handle assigning values.

4.Review the feature design

A Identify the contracts and expected behavior

This focused design shows the members or flow relevant to this feature. Keep unchanged members from your preceding checkpoint; follow the tasks below for the order of intermediate edits.

Construct employees, booth and guest. class Employee { - name : string - number : int + Employee(name : string, number : int) } class Booth { - ticketPrice : decimal + Attendant : Employee + Booth(attendant : Employee, ticketPrice : decimal) } class Guest { - age : int - name : string - wallet : Wallet + Guest(name : string, age : int, moneyBalance : decimal) } Booth --> Employee : Attendant Guest --> Wallet : wallet — Construct employees, booth and guest

5.Refactor the Employees

2.5.3 How to Use a Constructor with Parameters

A In the Employee class, change the visibility from public to private on both the Name and Number fields

Review this feature’s design and requirements

B Define a constructor with the parameters name of type string and number of type int

Review this feature’s design and requirements

C In the constructor, assign the name field to the name parameter and the number field to the number parameter

public Employee(string name, int number)
{
    this.name = name;
    this.number = number;
}

D In the MainWindow in the newComoZooButton_Click, delete the lines of code that instantiate and assign values of the Doctor and Attendant

E In the MainWindow in the newComoZooButton_Click above the instantiation of the comoZoo, define a variable of type Employee named attendant and assign it to a new instantiation of the Employee class and pass in the string "Sam" and the number 42 as arguments

Employee attendant = new Employee("Sam", 42);

Review this feature’s design and requirements

F On the next line, define a variable of type Employee named doctor and assign it to a new instance of the Employee class and pass in the string "Flora" and the number 98

Review this feature’s design and requirements

6.Refactor the Booth

2.5.4 How to Use a Constructor with Object Parameters

A In the Booth class, change the visibility of the TicketPrice from public to private and rename it to ticketPrice

B Define a constructor with the parameters attendant of type Employee and ticketPrice of type decimal

Review this feature’s design and requirements

C In the constructor, assign the Attendant field to the attendant parameter and the ticketPrice field to the ticketPrice parameter

D In the MainWindow in the newComoZooButton_Click, delete the lines of code that instantiate and assign values of the Booth

E Below the lines of code that instantiate the Employees, define a variable of type Booth named booth, assign it to a new instance of the Booth class and pass in the attendant object and 15.00m as arguments

Booth booth = new Booth(attendant, 15.00m);

Review this feature’s design and requirements

7.Refactor the Guest

A In the Guest class, change the visibility of Age and Name from public to private and rename the fields to age and name

B Modify the existing constructor and add the parameters name of type string, age of type int and moneyBalance of type decimal

Review this feature’s design and requirements

C In the constructor, assign the age field to the age parameter and the name field to the name parameter

D In the MainWindow in the newComoZooButton_Click and newSanDiegoZooButton_Click methods, delete the lines of code that instantiate and assign values of the Visitor

E In the newComoZooButton_Click below the line of code that instantiates the Booth, define a variable of type Guest named visitor, assign it to an instance of the Guest class, and pass in the string "Darla", the number 11 and the decimal value 5.25m

F In the newSanDiegoZooButton_Click below the line of code that instantiates the Booth, define a variable of type Guest named visitor, assign it to an instance of the Guest class, and pass in the string "Dave", the number 13 and the decimal value 3.75m

G In the constructor, call the AddMoney method and pass in the moneyBalance parameter as an argument

Review this feature’s design and requirements

8.Refactor the code in the MainWindow for the newSanDiegoZooButton_Click so that the Employees, Booth, and Guest are instantiated using constructors

Review this feature’s design and requirements

A Verify the required change or observation

Check the result against this instruction: Refactor the code in the MainWindow for the newSanDiegoZooButton_Click so that the Employees, Booth, and Guest are instantiated using constructors.

9.Check Your Work (Como Zoo):

A Set a breakpoint in the newComoZooButton_Click on the line that assigns the attendant variable

B Start the application. Click the New Como Zoo button

C Press F11. Step through the constructor and return to the MainWindow

D Press F11. Ensure that the attendant variable is an instance of the Employee class with the name Sam with the number 42

Check Your Work: Attendant Values; compare object identities, field values, and execution position with your debugger. — Check Your Work: Attendant Values

E Press F10. Ensure that the doctor variable is an instance of the Employee class with the name Flora and the number 98

F Press F11. Step through the constructor and return to the MainWindow

G Press F11. Ensure that the booth is an instance of Booth class with an Attendant with the name Sam and number 42 and a ticketPrice of 15.00

Check Your Work: Booth Values; compare object identities, field values, and execution position with your debugger. — Check Your Work: Booth Values

H Press F11. Step through the constructor and return to the MainWindow

I Press F11. Ensure that the visitor is an instance of the Guest class with an age of 11, name of Darla and a wallet object with a moneyBalance of 5.25

10.Check Your Work (San Diego):

A Set a breakpoint in the newSanDiegoZooButton_Click on the line that assigns the attendant variable

B Start the application. Click the New San Diego Zoo button

C Step over the instantiation of the Employees, Booth and Guest. Ensure that the values match the values below

Check Your Work: San Diego Zoo Values; compare object identities, field values, and execution position with your debugger. — Check Your Work: San Diego Zoo Values

Construct a complete zoo and its facilities

Problem

The MainWindow is handling the instantiation of the animal snack machine, birth area , restrooms and zoo AND assigning their values, when it should be the the responsibility of the class to handle that.

Solution

You will instantiate the animal snack machine, birth area, restrooms and zoo and pass values into a constructor that will then handle assigning values.

11.Review the feature design

A Identify the contracts and expected behavior

This focused design shows the members or flow relevant to this feature. Keep unchanged members from your preceding checkpoint; follow the tasks below for the order of intermediate edits.

Construct zoo facilities. class Zoo { - capacity : int - name : string - mensRoom : Restroom - ladiesRoom : Restroom + Zoo(name : string, capacity : int, restroomCapacity : int, animalFoodPrice : decimal, ticketBooth : Booth, doctor : Employee, visitor : Guest) } class VendingMachine { - foodPricePerPound : decimal {readOnly} - foodStock : double + VendingMachine(foodPrice : decimal) } class BirthingRoom { + BirthingRoom(doctor : Employee) } class Restroom { - capacity : int {readOnly} - gender : string + Restroom(capacity : int, gender : string) } Zoo --> VendingMachine : constructs Zoo --> BirthingRoom : constructs Zoo --> Restroom : constructs two — Construct zoo facilities

Zoo constructor configuration
Argument	Como	San Diego
name	Como Zoo	San Diego Zoo
capacity	1000	3000
restroomCapacity	4	12
animalFoodPrice	0.75m	1.20m

12.Refactor the animal snack machine

A In the VendingMachine class, change the visibility of the FoodPricePerPound and FoodStock from public to private and change the names to foodPricePerPound and foodStock. Make the foodPricePerPound field readonly

B Change all references to FoodPricePerPound and FoodStock to the proper camel casing

C Define a constructor with the parameter foodPrice of type decimal

Review this feature’s design and requirements

D In the constructor, assign the foodPricePerPound to the foodPrice parameter

E In the constructor, add a while loop that fills the snack machine when initialized. Model the while loop after the while loop in the FillVendingMachine code in the Employee class

F In the MainWindow, delete the lines of code that instantiate and reference the AnimalSnackMachine

13.Refactor the birthing room

A In the BirthingRoom class, modify the existing constructor by adding a parameter of type Employee named doctor

Review this feature’s design and requirements

B In the constructor, assign the Doctor field to the doctor parameter

C In the MainWindow, delete the line of code that instantiates the BirthArea

14.Refactor the restrooms

2.5.5 How to Assign Readonly Fields Using a Constructor

A In the Restroom class, change the visibility of the Capacity and Gender fields from public to private and rename the fields to capacity and gender. Make the capacity field readonly

B Define a constructor with the parameters capacity of type int and gender of type string

Review this feature’s design and requirements

C Assign the readonly capacity field to the capacity parameter and the gender field to the gender parameter

D In the MainWindow, delete the instantiation and references to MensRoom and LadiesRoom

15.Refactor the zoo

A In the Zoo class, change the visibility of the Capacity, MensRoom, LadiesRoom, and Name from public to private and rename the fields to capacity, mensRoom, ladiesRoom, and name

B Modify the Zoo constructor by adding the parameters name of type string, capacity of type int, restroomCapacity of type int, animalFoodPrice of type decimal, ticketBooth of type Booth, doctor of type Employee, and visitor of type Guest

Review this feature’s design and requirements

C In the MainWindow in the newComoZooButton_Click, move the line of code that instantiates the comoZoo below the lines of code that instantiate the Employees, Booth, and Guest and pas in the string "Como Zoo", 1000, 4, 0.75m, booth, doctor, and visitor

this.comoZoo = new Zoo("Como Zoo", 1000, 4, 0.75m, booth, doctor, visitor);

Review this feature’s design and requirements

D Assign fields in the Zoo constructor

1 Assign the AnimalSnackMachine field to an instance of the VendingMachine class and pass in the animalFoodPrice as an argument

Review this feature’s design and requirements

2 Assign the BirthArea field to an instance of the BirthingRoom class and pass in the doctor as an argument

Review this feature’s design and requirements

3 Assign the capacity field to the capacity parameter

4 Assign the ladiesRoom field to an instance of the Restroom class and pass in the restroomCapacity and string "Female" as arguments

Review this feature’s design and requirements

5 Assign the mensRoom field to an instance of the Restroom class and pass in the restroomCapacity and string "Male" as arguments

Review this feature’s design and requirements

6 Assign the name field to the name parameter

7 Assign the TicketBooth field to the ticketBooth parameter

8 Assign the Visitor field to the visitor parameter

E In the MainWindow in the newSanDiegoZooButton_Click, move the line of code that instantia the sanDiegoZoo below the lines of code that instantiate the Employees, Booth, and Guest and in the string "San Diego Zoo", 3000, 12, 1.20m, booth, doctor, and visitor

this.sanDiegoZoo = new Zoo("San Diego Zoo", 3000, 12, 1.20m, booth, doctor, visitor);

Review this feature’s design and requirements

F In the MainWindow, delete the lines of code that assign the Capacity and Name fields for the Como and San Diego Zoos

17.Check Your Work (SanDiegoZoo):

A Set a breakpoint in the newSanDiegoZooButton_Click on the line of code that instantiates the sanDiegoZoo

B Start the application. Click the New San Diego Zoo button

C Press F10. In the Autos window, ensure that the values of the sanDiegoZoo match the values below

Construct animals with their initial state

Problem

The MainWindow is handling the instantiation of the animals AND assigning their values, when it should be the the responsibility of the class to handle that.

Solution

You will instantiate the animals and pass values into a constructor that will then handle assigning values.

18.Review the feature design

A Identify the contracts and expected behavior

This focused design shows the members or flow relevant to this feature. Keep unchanged members from your preceding checkpoint; follow the tasks below for the order of intermediate edits.

Initialize an animal in its constructor. class Animal { - age : int - gender : string - happinessLevel : int + Name : string + Type : string + Weight : double + Animal(type : string, gender : string, name : string, age : int, weight : double) } — Initialize an animal in its constructor

19.In the Animal class, change the visibility of the Age, Gender and HappinessLevel from public to private and rename the fields to age, gender and happinessLevel and change all references to lowercase

A Verify the required change or observation

Check the result against this instruction: In the Animal class, change the visibility of the Age, Gender and HappinessLevel from public to private and rename the fields to age, gender and happinessLevel and change all references to lowercase.

20.Define a constructor that has the parameters type of type string, gender of type string, name of type string, age of type int, and weight of type double

Review this feature’s design and requirements

A Verify the required change or observation

Check the result against this instruction: Define a constructor that has the parameters type of type string, gender of type string, name of type string, age of type int, and weight of type double.

21.In the constructor, assign the age field to the age parameter, the gender field to the gender parameter, the Name field to the name parameter, the Type field to the type parameter, and the Weight field to the weight parameter

A Verify the required change or observation

Check the result against this instruction: In the constructor, assign the age field to the age parameter, the gender field to the gender parameter, the Name field to the name parameter, the Type field to the type parameter, and the Weight field to the weight parameter.

22.In the MainWindow in the newComoZooButton_Click, instantiate Dolly the Dingo by passing in arguments

Animal animal = new Animal("Dingo", "Female", "Dolly", 4, 35.3);

Review this feature’s design and requirements

A Verify the required change or observation

Check the result against this instruction: In the MainWindow in the newComoZooButton_Click, instantiate Dolly the Dingo by passing in arguments.

23.Instantiate Dixie the Dingo using the constructor

A Verify the required change or observation

Check the result against this instruction: Instantiate Dixie the Dingo using the constructor

24.Instantiate Pammy the Platypus using the constructor

A Verify the required change or observation

Check the result against this instruction: Instantiate Pammy the Platypus using the constructor

25.In the MainWindow in the newSanDiegoZooButton_Click, instantiate Patti the Platypus by using the constructor

A Verify the required change or observation

Check the result against this instruction: In the MainWindow in the newSanDiegoZooButton_Click, instantiate Patti the Platypus by using the constructor.

26.Instantiate Harold the Hummingbird by using the constructor

A Verify the required change or observation

Check the result against this instruction: Instantiate Harold the Hummingbird by using the constructor.

27.Delete the lines of code that assign the values of the animal object directly

A Verify the required change or observation

Check the result against this instruction: Delete the lines of code that assign the values of the animal object directly.

28.In the Animal class, instantiate the baby object using a constructor and delete the lines of code that assigned its values

A Verify the required change or observation

Check the result against this instruction: In the Animal class, instantiate the baby object using a constructor and delete the lines of code that assigned its values.

29.Check Your Work (Como Zoo):

A Set a breakpoint in the newComoZooButton_Click on the line of code that instantiates Dolly the Dingo

B Start the application. Click the New Como Zoo button

C Press F10. Ensure that the values of the animal match the values below

Check Your Work: Animal Values; compare object identities, field values, and execution position with your debugger. — Check Your Work: Animal Values

D Press F10 until the pointer hits the line of code that instantiates Dixie the Dingo

E Press F10. Ensure that the values of the animal match the values below

F Press F10 until the pointer hits the closing curly brace. Ensure that the animals's Count is 3

30.Check Your Work (San Diego):

A Set a breakpoint on the closing curly brace of the newSanDiegoZooButton_Click

B Start the application. Click New San Diego Zoo

C In the Autos window, ensure that the Animals list has the proper animals in it and that the values match

Construct food with a weight

Problem

Food is instantiated in different places in the application for different reasons and the assigning of the fields is not taking place in the Food class when it should.

Solution

You will define a constructor in the Food class and use the constructor to instantiate food.

31.Review the feature design

A Identify the contracts and expected behavior

This focused design shows the members or flow relevant to this feature. Keep unchanged members from your preceding checkpoint; follow the tasks below for the order of intermediate edits.

Initialize food in its constructor. class Food { + Weight : double + Food(weight : double) } Animal ..> Food : new Food(milkWeight) VendingMachine ..> Food : new Food(foodWeight) — Initialize food in its constructor

32.In the Food class, define a constructor with the parameter weight of type double

Review this feature’s design and requirements

A Verify the required change or observation

Check the result against this instruction: In the Food class, define a constructor with the parameter weight of type double.

33.In the constructor, assign the Weight field to the weight parameter

A Verify the required change or observation

Check the result against this instruction: In the constructor, assign the Weight field to the weight parameter.

34.In the Animal class in the Nurse method, pass in the milkWeight as an argument when instantiating the milk and delete the line of code that assigns the Weight field

Review this feature’s design and requirements

A Verify the required change or observation

Check the result against this instruction: In the Animal class in the Nurse method, pass in the milkWeight as an argument when instantiating the milk and delete the line of code that assigns the Weight field.

35.In the VendingMachine class in the SellFood method, pass in the foodWeight as an argument when instantiating the food and delete the line of code that assigns the Weight field

Review this feature’s design and requirements

A Verify the required change or observation

Check the result against this instruction: In the VendingMachine class in the SellFood method, pass in the foodWeight as an argument when instantiating the food and delete the line of code that assigns the Weight field.

36.Check Your Work (Como Zoo):

A Set breakpoints on the lines of code that instantiate Food objects

B Start the application. Click New Como Zoo. Click Darla feed dingo

C Press F10. Ensure that the Weight of the food is 0.3975

D Click Continue. Press the Birth dingo button

E Press F10. Ensure that the Weight of the milk is 0.1537

37.Check Your Work (San Diego):

A Set breakpoints on the lines of code that instantiate Food objects

B Start the application. Click New San Diego Zoo. Click Dave feed platypus

C Press F10. Ensure that the Weight of the food is 0.096

D Click Continue. Press the Birth platypus button. The milk-construction breakpoint is not hit because the platypus does not nurse in this scenario; its birth sequence can still proceed

Keep window statistics private

38.Review the feature design

A Identify the contracts and expected behavior

This focused design shows the members or flow relevant to this feature. Keep unchanged members from your preceding checkpoint; follow the tasks below for the order of intermediate edits.

Private statistic fields. class MainWindow { - zooAnimalCount : int - zooAverageAnimalWeight : double } — Private statistic fields

39.In the MainWindow class, change the visibility of the ZooAnimalCount and ZooAverageAnimalWeight from public to private and rename the fields to zooAnimalCount and zooAverageAnimalWeight

A Verify the required change or observation

Check the result against this instruction: In the MainWindow class, change the visibility of the ZooAnimalCount and ZooAverageAnimalWeight from public to private and rename the fields to zooAnimalCount and zooAverageAnimalWeight.

40.Change all references to ZooAnimalCount and ZooAverageAnimalWeight to the proper camel casing

A Verify the required change or observation

Check the result against this instruction: Change all references to ZooAnimalCount and ZooAverageAnimalWeight to the proper camel casing.

Submit your work

41.Ensure that all code is StyleCop compliant

A Verify the required change or observation

Check the result against this instruction: Ensure that all code is StyleCop compliant.

42.Zip the solution and submit to the Feedback System

A Verify the required change or observation

Check the result against this instruction: Zip the solution and submit to the Feedback System.

43.Submit the Feedback System url to the correct assignment in Canvas

A Verify the required change or observation

Check the result against this instruction: Submit the Feedback System url to the correct assignment in Canvas.

Completion checklist

44.Review the required evidence

A Check every acceptance criterion

Return to each user story and confirm that you can demonstrate its acceptance criteria. Use the task checkboxes to track completion; a checked box is not a substitute for testing or inspecting the required evidence.

Construct employees, booths, and guests with their values Construct a complete zoo and its facilities Construct animals with their initial state Construct food with a weight Keep window statistics private

B Build and inspect the final solution

Remove temporary lines used only to demonstrate compile-time errors. Build without errors or warnings, check StyleCop compliance, and rerun the required scenario paths.

C Follow this activity’s submission instructions

Use the submission or attendance instructions in this page. For a Feedback System submission, upload the requested ZIP, review and resolve the feedback, and submit the resulting URL to the matching Canvas activity. For a Canvas quiz, enter only the requested answers; for an oral final, complete the scheduling and attendance steps.

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