Question

JAVA program

Create a class called Array

Outside of the class, import the Scanner library

Outside of main declare two static final variables and integer for number of days in the week and a double for the revenue per pizza (which is $8.50).

Create a method called main

Inside main:

1. Declare an integer array that can hold the number of pizzas purchased each day for one week.
2. Declare two additional variables one to hold the total sum of pizzas sold in a week and one to hold the average pizzas sold per day
3. Instantiate a Scanner object
4. Using an appropriate loop, ask the user to enter in the number of pizza for each day
   1. The program must test the entry value.
   2. If the number entered is negative, the program must display an error message and allow for the reentry of the value for that day. The program will continue to ask for a valid response until a valid response is entered.
   3. If the number is valid (greater than or equal to zero), the program will then prompt for the next value until the loop ends.
   4. Extra Credit will be given if the validation test is done via a method call.
5. Send the array to a method that displays a title for the report as well as the number of pizzas sold for each day.
6. Send the array to a method that calculates the sum total of pizzas sold for the week; the method returns the sum total back to main().
7. Send the array to a method that calculates the average number of pizzas sold for the week; the method returns the average back to main().
8. Display the following:
   1. The total number of pizzas sold for the week
   2. The average number of pizzas sold per day
   3. The total revenue from the pizza sold for the week
   4. The average revenue per day
9. Display a thank you/goodbye message.
10. Comment your code.

Screen Shots:

Please enter the number of pizzas sold for

Day 1: 5

Day 2: 9

Day 3: -3

Invalid value. Please enter valid value

Day 3: 3

Day 4: 12

Day 5: 4

Day 6: 16

Day 7: 22

Pizza Calculator

Sales Report

Day 1: 5

Day 2: 9

Day 3: 3

Day 4: 12

Day 5: 4

Day 6: 16

Day 7: 22

Total Pizzas Sold for the Week: 71

Average Pizza Sold for the week: 10.1

Total Revenue for the week: $603.50

Average Revenue per day: $86.21

Thank you for using Pizza Counter. Goodbye!

Answer 1

Here is the code in java:

Array.java

import java.util.*;

public class Array
{
    public static int days = 7;
    public static double rev = 8.50;
        public static void main(String[] args) 
        {
            int d=0,tot=0;
            double ftot,avg,totrev,avgrev;
            int Ar[] = new int[10];
            Scanner scan = new Scanner(System.in);
            
            //Pizza value input part
                System.out.println("Please enter the number of pizzas sold for");
                while(d<days)
                {
                    System.out.printf("Day %d: ", d+1);
                    Ar[d] = scan.nextInt();
                    
                    //Check for valid input
                    if(Ar[d] < 0)
                    {
                        System.out.println("Invalid value. Please enter valid value");
                    }
                    else
                    {
                        tot+=Ar[d];
                        d++;
                    }
                }
                
                //Pizza value Display part
                System.out.println("Pizza Calculator Sales Report:");
                d=0;
                while(d<days)
                {
                    System.out.printf("Day %d: %d\n",d+1,Ar[d]);
                    d++;
                }
                
                //Calculation part
                ftot = tot;
                avg = ftot/days;
                totrev = tot*rev;
                avgrev = totrev/days;
                System.out.printf("\nTotal Pizza sold for the Week: %d",tot);
                System.out.printf("\nAverage Pizza sold for the Week: %.2f",avg);
                System.out.printf("\nTotal Revenue for the Week: $%.2f",totrev);
                System.out.printf("\nAverage Revenue per day: $%.2f",avgrev);
                System.out.println("\nThank you for using Pizza Counter. Goodbye!");
        }
}

Output: