Question

I need help with this assignment

(Calculating Sales) An online retailer sells five products whose retail prices are as follows: Product 1, $2.98; product 2, $4.50; product 3, $9.98; product 4, $4.49 and product 5, $6.87. Write an application that reads a series of pairs of numbers as follows:

a) product number

b) quantity sold

Your program should use a switch statement to determine the retail price for each product. It should calculate and display the total retail value of all products sold. Use a sentinel-controlled loop to determine when the program should stop looping and display the final results.


It is a java programming course and I am using eclipse as the coding program and I think I got most of the answer (or the code to do it) but I keep getting errors.


import java.util.Scanner; // program uses class Scanner
public class fiveseventeen
{
private String buyerName; // name of the purchaser
// int instance variables are initialized to 0 by default
private int total; // sum of purchase price
private int purchaseCounter; // number of purchases made
private int product1; // count of product 1 purchases
private int product2; // count of product 2 purchases
private int product3; // count of product 3 purchases
private int product4; // count of product 4 purchases
private int product5; // count of product 5 purchases
// constructor initializes productName
public fiveseventeen( String name )
{
buyerName = name;// intitializes productName
}// end contstructor
// method to set product name
public void setBuyerName( String name )
{
buyerName = name;// store the product name
}// end method setProductName
// method to return product name
public String getBuyerName()
{
return buyerName;
}// end method getProductName
// display a welcome message to the purchaser
public void displayMessage()
{
// getBuyerName gets name of purchaser
System.out.printf( "Hello, %s! Please select the products that you wish to purchase.", getBuyerName() );
}// end method displayMessage
// input arbitrary number for product selection from user
public void inputPurchase()
{
Scanner input = new Scanner(System.in);
int selection; // product entered by user
System.out.printf( "%s\\%s\\ %s\\ %s\\",
"Enter a product selection using an integer in range of 1-5.",
"Type end-of-line indicator complete purchase",
"On UNIX/Linux/Mac OS X type d then press Enter",
"On Windows type z then press Enter" );
// loop until user enters sentery
while( input.hasNext() )
{
selection = input.nextInt(); // read selection
total += selection; // add selection to total
++purchaseCounter; // increment number of selections
// call the method to increment appropriate counter
incrementNumberPurchaseCounter( selection );
}// end method inputPurchase
}
// add 1 to appropriate counter for specified counter
private void incrementNumberPurchaseCounter( int selection )
{
// determine which product number was entered
switch( selection )
{
case 1: // selection was product1
++product1; // increment product1
break;
case 2: // selection was product2
++product2; // increment product2
break;
case 3: // selection was product3
++product3; // increment product3
break;
case 4: // selection was product4
++product4; // increment product4
break;
case 5: // selection was product5
++product5; // increment product5
break;
}// end switch
} // end method incrementNumberPurchaseCounter
// display a report based on the selections entered
public void displayPurchaseReport()
{
System.out.println( "\\Purchases this session: ");
// if user entered at leaset on grade...
if( purchaseCounter != 0 )
{
// calculate total of all products entered
double sum = (double) total + purchaseCounter;
// output summary of results
System.out.printf( "Total of the %d products enter is %d\\", purchaseCounter, total );
System.out.printf( "The total cost is %d\\", sum );
System.out.printf( "%s\\%s%d\\%s%d\\%s%d\\%s%d\\%s%d\\",
"Number of each product purchased: ",
"Product 1: ", product1,
"Product 2: ", product2,
"Product 3: ", product3,
"Product 4: ", product4,
"Product 5: ", product5 );
} // end if
else // no product numbers were entered
System.out.println( "No products were entered" );
} // end method displayPurchaseReport
} // end class



In the " Scanner input = new Scanner(System.in); " I am getting some sort of an error and when I click on the message it gives me several "try this".
I don't really understand this program so any help would still help

thanks

Answer 1

import java.util.Scanner;

public class CalculatingSales {

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

int product, quantity;

double total = 0;

while(true) {

System.out.println("Enter product_id and quantity(0 0 to stop): ");

product = sc.nextInt();

quantity = sc.nextInt();

if(product==0 && quantity == 0)

break;

switch (product) {

case 1:

total = total + 2.98*quantity;

break;

case 2:

total = total + 4.50*quantity;

break;

case 3:

total = total + 9.98*quantity;

break;

case 4:

total = total + 4.49*quantity;

break;

case 5:

total = total + 6.87*quantity;

break;

default:

System.out.println("Invalid option");

}

}

System.out.println("total value: "+total);

sc.close();

}

}

Step-by-step explanation:

• Take the product and quantity as input from user.
• Use a switch statement to multiply the total with their relevant value.
• Display the total value.