Microsoft Visual C#
7th Edition
ISBN: 9781337102100
Author: Joyce, Farrell.
Publisher: Cengage Learning,
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Create an application named ShapesDemo that creates several objects that descend from an abstract class called GeometricFigure. Each GeometricFigure includes a height, a width, and an area.
Provide get and set accessors for each field except area; the area is computed and is read-only. Include an abstract method called ComputeArea() that computes the area of the GeometricFigure.
Next you will create three additional classes derived from the GeometricFigure class. Name these derived classes: Rectange, Square, and Triangle
Create a Rectangle is a GeometricFigure whose area is determined by multiplying width by height.
Create a Square is a Rectangle in which the width and height are the same. Provide a constructor that accepts both height and width, forcing them to be equal if they are not. Provide a second constructor that accepts just one dimension and uses it for both height and width. The Square class uses the Rectangle’s ComputeArea() method.
Create a Triangle is a GeometricFigure…
Create an application named ShapesDemo that creates several objects that descend from an abstract class called GeometricFigure. Each GeometricFigure includes a height, a width, and an area. Provide get and set accessors for each field except area; the area is computed and is read-only. Include an abstract method called ComputeArea() that computes the area of the GeometricFigure. Next you will create three additional classes derived from the GeometricFigure class. Name these derived classes: Rectange, Square, and Triangle.
Create a class called FinalGrade that is used to represent the points obtained in the letter grade of CSC 110 by different students. The FinalGrade class should include three pieces of information as instance variables—studentName (type String), studentID (type String), and pointsObtained (type int). Your class should have a constructor that initializes the three instance variables. Provide a set and a get method for each and every instance variable. In addition, provide a method named computeLetterGrade that returns the letter grade obtained by the student taking the pointsObtained as an argument. For the grading policy refer to CSC 110 grading scheme specified in syllabus. Write a test application named FinalGradeDriver that creates at least 3 different objects of class FinalGrade and test all the methods of class FinalGrade.
Sample Output
Student Name : Homer SimpsonStudent ID : S123456Points Obtained : 99Letter Grade : A
Student Name : Marge SimpsonStudent ID : S234567Points…
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- Create an application class named LetterDemo that instantiates objects of two classes named Letter and CertifiedLetter and that demonstrates all their methods. The classes are used by a company to keep track of letters they mail to clients. The Letter class includes auto-implemented properties for the name of the recipient and the date mailed. Also, include a ToString() method that overrides the Object classs ToString() method and returns a string that contains the name of the class (using CetType and the Letters data field values. Create a child class named CertifiedLetter that includes an auto-implemented property that holds a tracking number for the letter.arrow_forwardIn Chapter 9, you created a Contestant class for the Greenville Idol competition. The class includes a contestants name, talent code, and talent description. The competition has become so popular that separate contests with differing entry fees have been established for children, teenagers, and adults. Modify the Contestant class to contain a field that holds the entry fee for each category, and add get and set accessors. Extend the Contestant class to create three subclasses: ChildContestant, TeenContestant, and AdultContestant. Child contestants are 12 years old and younger, and their entry fee is $15. Teen contestants are between 13 and 17 years old, inclusive, and their entry fee is S20. Adult contestants are 18 years old and older, and their entry fee is $30. In each subclass, set the entry fee field to the correct value, and override the Tostring() method to return a string that includes all the contestant data, including the age category and the entry fee. Modify the GreenvilleRevenue program so that it performs the following tasks: The program prompts the user for the number of contestants in this years competition, which must be between 0 and 30. The program continues to prompt the user until a valid value is entered. The program prompts the user for names, ages, and talent codes for the contestants entered. Along with the prompt for a talent code, display a list of valid categories. Based on the age entered for each contestant, create an object of the correct type (adult, teen, or child), and store it in an array of Contestant objects. After data entry is complete, display the total expected revenue, which is the sum of the entry fees for the contestants. After data entry is complete, display the valid talent categories and then continuously prompt the user for talent codes, and display all the data for all the contestants in each category. Display an appropriate message if the entered code is not a character or a valid code.arrow_forwardAssume that you have created a class named MyClass. The header of the MyClass constructor can be ____________. public MyClass() public MyClass (double d) Either of these can be the constructor header. Neither of these can be the constructor header.arrow_forward
- Write a program named SalespersonDemo that instantiates objects using classes named Real EstateSalesperson and GirlScout. Demonstrate that each object can use a SalesSpeech() method appropriately. Also, use a MakeSale() method two or three times with each object, and display the final contents of each objects data fields. First, create an abstract class named Salesperson. Fields include first and last names; the Salesperson constructor requires both these values. Include properties for the fields. Include a method that returns a string that holds the Salespersons full name—the first and last names separated by a space. Then perform the following Create two child classes of Salesperson: Real EstateSalesperson and Girl Scout. The Real EstateSalesperson class contains fields for total value sold in dollars and total commission earned (both of which are initialized to 0), and a commission rate field required by the class constructor. The Girl Scout class includes a field to hold the number of boxes of cookies sold, which is initialized to 0. Include properties for every field. Create an interface named ISell able that contains two methods: SalesSpeech() and MakeSale(). In each Real EstateSalesperson and Girl Scout class, implement SalesSpeech() to display an appropriate one- or two-sentence sales speech that the objects of the class could use. In the Real Estatesalesperson class, implement the MakeSale() method to accept an integer dollar value for a house, add the value to the Real EstateSalespersons total value sold, and compute the total commission earned. In the Girl Scout class, implement the MakeSale() method to accept an integer representing the number of boxes of cookies sold and add it to the total field.arrow_forwardCreate an application named PhotoDemo that demonstrates the methods of three related classes for a company that develops photographs.Create a class named Photo that includes fields for width and height in centimeters and properties for each field. Include a protected price field, and set it to $3.99 for an 8-inch by 10-inch photo, $5.99 for a 10-inch by 12-inch photo, and $9.99 for any other size (because custom cutting is required). The price field requires a get accessor but no set accessor. Also include a ToString() method that returns a string constructed from the values of the fields. Derive two subclasses MattedPhoto and FramedPhoto. The MattedPhoto class includes a string field to hold a color, and the FramedPhoto class includes two string fields that hold the frame’s material (such as silver) and style (such as modern). The price for a MattedPhotoincreases by $10 over its base cost, and the price for a FramedPhoto increases by $25 over its base cost. Each subclass should…arrow_forwardCreate a class called Person that will hold information about a single individual. This class should have a data section that consists of the following: Variable Name Data Type firstName string lastName string address string The Person class should have the following mutators: setFirstName(string first); setLastName(string last); setAddress(string address); The Person class should have the following accessors: string getFirstName(); string getLastName(); string getAddress(); The Person class should have the following constructors: Person(); - default Person(string first, string last); - Set other fields to an empty string Person(string first, string last, string address); Note: You must use delegating constructors to eliminate duplicate code. Main Create an array which will hold 5 Person classes. Pass the array to a function called getPeople which will fill out the array with information about people taken from the keyboard. Create a…arrow_forward
- Create a class named FootballTeam. Include two fields that hold data about theteams participating in the game. Also include a field for game time (for example, 5PM). Include a constructor that takes parameters for two FootballTeam objects anda time. From the main method, instantiate a FootballTeam object, then pass theGame to a method that displays the details about the FootballTeam.arrow_forwardCreate a class named Person that holds the following fields: two String objectsfor the person’s first and last name and a LocalDate object for the person’sbirthdate. Create a class named Couple that contains two Person objects. Create aclass named Wedding for a wedding planner that includes the date of the wedding,the names of the Couple being married, and a String for the location. Provideconstructors for each class that accept parameters for each field, and provide getmethods for each field. Then write a program that creates two Wedding objectsand in turn passes each to a method that displays all the details. Save the files asPerson.java, Couple.java, Wedding.java, and TestWedding.java.arrow_forwardCreate a class Car with parameters companyName, color, maxSpeed (Not more than 150) andcategory. Use appropriate data types and access specifiers. Use default constructor to create objectsof cars. (JAVA)arrow_forward
- 3.a. Create an interface named Turner, with a single method named turn(). Create a class named Leaf that implements turn() to display Changing colors. Create a class named Page that implements turn() to display Going to the next page. Create a class named Pancake that implements turn() to display Flipping. Write an application named DemoTurners that creates one object of each of these class types and demonstrates the turn() method for each class. Save the files as Turner.java, Leaf.java, Page.java, Pancake.java, and DemoTurners.java. 3.b. Think of two more objects that use turn(), create classes for them, and then add objects to the DemoTurners application, renaming it DemoTurners2. java. Save the files, using the names of new objects that use turn(). 3.c. Apply Dynamic method dispatch to show the power of it and name the class as DemoTurners3.arrow_forwardCreate four (4) Java classes named Color, Model, Car, and CarDemo. In the Color class, create an enum named Color that consists of six (6) colors of your choice. In the Model class, create an enum named Model that contains the following values: SEDAN, SUV, CONVERTIBLE, and HATCHBACK. In the Car class, declare three (3) private fields: int variable named year A Model object named model A Color model named color Add a constructor for the Car class with three (3) parameters: yr (int), model (Model), and color (Color). Inside the constructor, assign yr to year, m to model, and c to color. Add a display( ) method that prints the three (3) Car object's data. In the main method of the CarDemo class, instantiate two (2) Car objects assigning values to them using enumeration values for the models and colors. Example: Car car1 = new Car(2014, Model.SUV, Color.RED); Add two (2) statements to display the data of the two (2) Car objects.arrow_forward
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