Question

THIS MUST BE DONE ON VISUAL STUDIO

Write a C# program that computes a the cost of donuts at your local Rich Horton’s store. The cost, of course, depends on the number of donuts you purchase. The following table gives the break down: Donuts Purchased Cost per Donut ($) = 15 0.75 A customer can save on the HST (13%) if they buy 12 or more donuts so only charge HST (use a constant) on the purchase if the customer purchases less than 12 donuts. Finally, there is a cover charge for the luxury of actually getting one of Rich Horton’s gourmet donuts. The constant cover charge is a flat $0.25 (before HST) which is added to the cost no matter how many donuts are purchased (this should be a constant). The program should input the Customer’s Last Name (string), and the number of donuts purchased (int). The program should output (in a neat manner): Last Name, Number of Donuts Purchased, and Total Cost. The program should also validate the user’s input so if the user enters a negative number of donuts, an error message should be printed. For all assignments, you are to submit: 1. Properly documented source code (.cs file) which includes comments at the top of your program (containing your name, student number, a description of the program), the list of variable names with their uses (data dictionary), and comments within the body of your program (inline comments). 2. Sample output showing your program works using the template that is provided on BlackBoard. This is to be a PDF file that contains one screen shoot of an output window, and several more cut and pastes of sample outputs (use a word processor and then export as a PDF). Please note that one sample output does NOT demonstrate that your program works. Your job is to prove to the marker that your program works for all cases (for example in this case, a negative number of donuts, between 0 and 7 donuts, between 8 and 15 donuts, and greater than 15 donuts. Failure to use the testing template or to submit as a PDF could result in a 0 for the testing component of the assignment. These 2 files are to be attached to the Assignment 1 DropBox by the due date

Answer 1

Open Visual Studio and create Console Application with the language C#.

The Cost per Donut is 150.75

Create 2 classes Donut and DonutDriver

Donut class:

This class has the following member variables:

• constant HST
• constant coverCharge
• string lastName
• int numberOfDonuts
• double totalCost

methods:

• GetData:
• CalcPrice
• Display

GetData()

• GetData() method gets the input for lastName and number of Donuts
• this method checks for the valid input for number of Donuts
• this method gets the input for number of DOnuts only if the user enters positive number
• if they enter negative number then the code insists the user to re-enter the input.

CalcPrice()

• CalcPrice() is the method to calculate the total cost for Donuts.
• if number of Donuts is less than 12 then HST is applicable
• cover charge for luxury is to be added before applying HST
• if number of Donuts bought is 12 or more then HST is not applicable and only cover charge is to be added

Display()

• Display() method prints the lastName of the customer, number of Donuts bought and the total cost.

DonutDriver Class

• This class creates object for the Donut class
• Using that object it calls GetData(), CalcPrice() and Display() methods to perform the required operations.

Code:

using System;

using System.Collections.Generic;

using System.Text;

namespace ConsoleAppCS

{

    class Donut

    {

        public const double HST = 0.13; //HST is 13% of the cost of the Donut

        public const double coverCharge = 0.25; //cover charge for luxury

        private string lastName; //Last name of the customer

        private int numberOfDonuts; //Number of Donuts Purchased

        private double totalCost; //Total Cost for Donuts Bought

        //GetData() method gets the input for lastName and number of Donuts

        //this method checks for the valid input for number of Donuts

        //this method gets the input for number of DOnuts only if the user enters positive number

        //if they enter negative number then the code insists the user to re-enter the input.

        public void GetData()

        {

            Console.Write("\n Enter Last Name : ");

            lastName = Console.ReadLine();

            do

            {

                Console.Write("\n Enter Number of Donuts : ");

                numberOfDonuts = Convert.ToInt32(Console.ReadLine());

                if (numberOfDonuts <= 0)

                    Console.WriteLine("Enter Valid Input for Number of Donuts !");

            } while (numberOfDonuts <= 0);

        }

        //CalcPrice() is the method to calculate the total cost for Donuts.

        //if number of Donuts is less than 12 then HST is applicable

        //cover charge for luxury is to be added before applying HST

        //if number of Donuts bought is 12 or more then HST is not applicable and only cover charge is to be added

        public void CalcPrice()

        {

            if (numberOfDonuts<12)

            {

                totalCost = (numberOfDonuts * 150.75 + coverCharge) * HST ;

            }

            else

            {

                totalCost = numberOfDonuts * 150.75 + coverCharge;

            }

        }

         

        //Display() method prints the details like last name, number of Donuts and total cost.

        public void Display()

       {

            Console.WriteLine("Last Name : {0}", lastName);

            Console.WriteLine("Number of Donuts : {0}", numberOfDonuts);

            Console.WriteLine("Total Cost : ${0:0.00}", totalCost);

        }

    }

    //DonutDriver is a driver class for Donut class

    //An object for Donut is created and the member methods of the Donut class is called using that object.

    class DonutDriver

    {

        static void Main(string[] args)

        {

            Donut d = new Donut();

            d.GetData();

            d.CalcPrice();

            d.Display();

        }       

    }

}

Screenshot:

Qusing System; using System.Collections.Generic; using System.Text; Snamespace ConsoleAppCS { 2 references class Donut { public const double HST = 0.13; //HST is 13% of the cost of the Donut public const double coverCharge = 0.25; //cover charge for luxury private string lastName; //Last name of the customer private int numberOfDonuts; //Number of Donuts Purchased private double totalCost; //Total Cost for Donuts Bought //GetData() method gets the input for lastName and number of Donuts //this method checks for the valid input for number of Donuts 1/this method gets the input for number of Donuts only if the user enters positive number //if they enter negative number then the code insists the user to re-enter the input. 1 reference public void GetData() { Console.Write("\n Enter Last Name : "); lastName = Console.ReadLine(); do { Console.Write("\n Enter Number of Donuts : "); numberofDonuts = Convert.ToInt32(Console.ReadLine()); if (numberOfDonuts <= 0) Console.WriteLine("Enter Valid Input for Number of Donuts !"); } while (numberOfDonuts <= @); }

//CalcPrice is the method to calculate the total cost for Donuts. //if number of Donuts is less than 12 then HST is applicable //cover charge for luxury is to be added before applying HST //if number of Donuts bought is 12 or more then HST is not applicable and only cover charge is to be added 1 reference public void CalcPrice() { if (numberOfDonuts<12) { totalCost = (numberOfDonuts 150.75 + coverCharge) * HST ; } else { totalCost = numberOfDonuts * 150.75 + coverCharge; } //Display() method prints the details like last name, number of Donuts and total cost. 1 reference public void Display() { Console.WriteLine("Last Name : {0}", lastName); Console.WriteLine("Number of Donuts : {0}", numberOfDonuts); Console.WriteLine("Total Cost : ${0:0.00}", totalCost); } //DonutDriver is a driver class for Donut class // An object for Donut is created and the member methods of the Donut class is called using that object. O references class DonutDriver { O references static void Main(string[] args) { Donut d = new Donut(); d. GetData(); d.CalcPrice(); d.Display();

Output:

Case 1:

Enter Last Name : AAA

Enter Number of Donuts : 12
Last Name : AAA
Number of Donuts : 12
Total Cost : $1809.25

Enter Last Name : AAA Enter Number of Donuts : 12 Last Name : AAA Number of Donuts : 12 Total Cost : $1809.25

Case 2:

Enter Last Name : LLL

Enter Number of Donuts : 5
Last Name : LLL
Number of Donuts : 5
Total Cost : $98.02

Enter Last Name : LLL Enter Number of Donuts : 5 Last Name : LLL Number of Donuts : 5 Total Cost : $98.02

Case 3:

Enter Last Name : PPP

Enter Number of Donuts : 19
Last Name : PPP
Number of Donuts : 19
Total Cost : $2864.50

Enter Last Name : PPP Enter Number of Donuts : 19 Last Name : PPP Number of Donuts : 19 Total Cost : $2864.50