Question

JAVA Point of Sale System
The McDowell Restaurant chain has asked you to write a menu program for their new Fast-food
service machines. Your program already prints the following menu like this:
**********************************************************************
McDowell’s Restaurant
**********************************************************************
Make your selection from the menu below:
1. Regular Hamburger $1.50
2. Regular Cheeseburger $1.75
3. Fish Sandwich $2.50
4. Half-pounder with cheese $2.75
5. French Fries $0.99
6. Large Soft Drink $1.25
***********************************************************************
Select 1, 2, 3, 4, 5, or 6 ----- >
Your program must now read the customer’s selection and compute the total price of their
purchase, including 6.5% sales tax.
Input
The first line of input represents N, the number of test cases. The additional lines consists of a
sequence of integers scoped between 1 to 6. Each number should indicate a selection from the
above menu to be purchased.
Output
The program should print the sum of the orders plus tax as “Please pay $<dollars>”, where
<dollar> is the total amount of the purchase then conclude with “Thank you for eating at
McDowell’s”.

Sample Input Sample Output
1
1 4 4 5 3 1 Please pay $12.77
Thank you for eating at McDowell’s!

Answer 1

/******************************
* McDowellRestaurantChain.java
*
******************************/

import java.text.DecimalFormat;
import java.util.Scanner;

//The class: McDowellRestaurantChain
public class McDowellRestaurantChain {
   //menu and price are taken in a constant static array of equal length
   //where ith element in MENU array represent the (i+1)th menu name and
   //ith element in PRICE array represents the corresponding menu's price
   private static final String[] MENU = {"Regular Hamburger","Regular Cheeseburger","Fish Sandwich",
           "Half-pounder with cheese","French Fries","Large Soft Drink"};
   private static final double[] PRICE = {1.50,1.75,2.50,2.75,0.99,1.25};
  
   private static final double SALES_TAX = 0.065; //6.5% sales tax as constant
  
  
   //the main method
   public static void main(String[] args){
      
       printMenu(); //prints menu first
      
       Scanner sc = new Scanner(System.in); //create the keyboard scanner
      
       try{
           int numOfTestCases = Integer.parseInt(sc.nextLine()); //get the number of test cases
          
           //prompt for user entry for <numOfTestCases> times to compute total for each test case
           for(int i = 1; i <= numOfTestCases ; i++){
               //get the current line entries
               //expecting the entries as space separated integer
               String currentEntry = sc.nextLine();
               String[] data = currentEntry.split(" "); //split it by space
               int[] selections = new int[data.length];//create integer array of splitted data array length
              
               //conver string[] into int[]
               for(int p = 0 ; p < data.length; p++){
                   selections[p] = Integer.parseInt(data[p]);
               }
              
               printTotalPay(selections); //print the total pay using current tst case's selection
              
               System.out.println("Thank you for eating at McDowell’s!");
           }
       }catch(NumberFormatException nfe){
           System.out.println("Invalid input"); //if any issue with string to integer conversion
       }
      
       sc.close();//close scanner
   }
  
   /**
   * print the menu
   */
   private static void printMenu(){
       DecimalFormat df = new DecimalFormat("#.00");//this will be used to format the price in 2 decimal digit
       System.out.println("**********************************************************************");
       System.out.println("McDowell’s Restaurant");
       System.out.println("**********************************************************************");
       System.out.println("Make your selection from the menu below:");
       for(int i = 0; i < MENU.length; i++){
           System.out.println((i+1)+". "+MENU[i]+" "+"$"+df.format(PRICE[i]));
       }
       System.out.println("**********************************************************************");
       System.out.println("Select 1, 2, 3, 4, 5, or 6 ----- >");
   }
  
   /**
   * calculate and print total pay including sales tax
   * using the selections array
   * @param selections
   */
   private static void printTotalPay(int[] selections){
       double total = 0;
       DecimalFormat df = new DecimalFormat("#.00"); //this will be used to format the output in 2 decimal digit
       for(int currentSelection: selections){
           total = total + PRICE[currentSelection -1];//get the price from PRICE array
       }
       double finalTotal = total + (total * SALES_TAX);
      
       System.out.println("Please pay $"+df.format(finalTotal));
   }

}

======================================

OUTPUT

======================================

RUN1

**********************************************************************
McDowell’s Restaurant
**********************************************************************
Make your selection from the menu below:
1. Regular Hamburger $1.50
2. Regular Cheeseburger $1.75
3. Fish Sandwich $2.50
4. Half-pounder with cheese $2.75
5. French Fries $.99
6. Large Soft Drink $1.25
**********************************************************************
Select 1, 2, 3, 4, 5, or 6 ----- >
1
1 4 4 5 3 2
Please pay $13.04
Thank you for eating at McDowell’s!

RUN2

**********************************************************************
McDowell’s Restaurant
**********************************************************************
Make your selection from the menu below:
1. Regular Hamburger $1.50
2. Regular Cheeseburger $1.75
3. Fish Sandwich $2.50
4. Half-pounder with cheese $2.75
5. French Fries $.99
6. Large Soft Drink $1.25
**********************************************************************
Select 1, 2, 3, 4, 5, or 6 ----- >
3
1 4 4 5 3 1 2
Please pay $14.63
Thank you for eating at McDowell’s!
2 4 5 1 2 3 4 5 1 2
Please pay $19.41
Thank you for eating at McDowell’s!
2 2 2 3 1 3 4
Please pay $15.44
Thank you for eating at McDowell’s!