by Aaron Bassett

Question by Jaix: Create a system in Java for a sales record program that computes and prints the discount for a item?
I am new to java but i am sorta stuck! The program need to choose from four objects. Based on the quantity ordered, if the quantity is < 6 no discount, if it is between 6 and 10 inclusive, 5% discount, between 11 and 20 inclusive, 10% discount, above 20, 15% discount. I've virtually finished the program but I have a logic error the discount method keeps printing 0.00. Will appreciate any help pointing out my mistake. Thanks! Here's my code.

/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/

package salesrecord

/**
*
* @author Jikes
*/
public class SalesRecord

private double itemPrice

double discount

public SalesRecord( double price )

setItemPrice( price )

public void setItemPrice( double price )

itemPrice = price

public double getItemPrice()

return itemPrice

public double calculateDiscount( int order )

if( order> 20 )

discount = 15 / 100 * itemPrice

else if( order <= 20 && order>= 11 )

discount = ten / 100 * itemPrice

else if( order <= 10 && order>= 6 )

discount = 5 / 10 * itemPrice

else

discount =

return discount

public double calculateAmount()

double amount
amount = itemPrice – discount
return quantity

The principal method code:

/*
* To alter this template, select Tools | Templates
* and open the template in the editor.
*/

package salesrecord

import java.util.Scanner

/**
*
* @author Jikes
*/
public class SalesRecordTest

/**
* @param args the command line arguments
*/
public static void primary(String[] args)
// TODO code application logic right here
int itemNumber =
int quantity
String itemName = “”
double cost =
Scanner input = new Scanner( Method.in )

Program.out.println( “Latest Objects IN STOCK ARE LISTED Beneath:n” )
System.out.println( “Item Numbert Item Name” )
Technique.out.println( “1)tt Dell 15″ Laptopn2)tt HP Mini NoteBookn3)tt Sony VIAO 12″ Tabletn4)tt Apple MacBook Air” )
Program.out.print( “nEnter Preferred Item Amount: ” )
itemNumber = input.nextInt()

if( itemNumber == 1 )

cost = 500
itemName = “Dell Laptop”
Technique.out.println( “You chosen Dell 15″ Laptopn” )

else if( itemNumber == two )

value = 400
itemName = “HP NoteBook”
System.out.println( “You chosen HP Mini NoteBookn” )

else if( itemNumber == three )

cost = 800
itemName = “Sony Tablet”
System.out.println( “You chosen Sony VIAO 12″ Tabletn” )

else if( itemNumber == 4 )

cost = 1300
itemName = “MacBook Air”
Technique.out.println( “You selected Apple MacBook Airn” )

else

Technique.out.println( “Invalid Item Quantity Entered!” )

Method.out.print( “Enter Preferred Quantity: ” )
quantity = input.nextInt()

SalesRecord mySalesRecord = new SalesRecord( cost )

Program.out.println()
System.out.println( “ITEM NUMBERtITEM NAMEtQUANTITYtPRICE ($ )tDISCOUNT ($ )tAMOUNT ($ )n” )
System.out.printf( “%dtt%st%dtt%.2ft%.2ftt%.2fnn”, itemNumber, itemName, quantity, mySalesRecord.getItemPrice(),
mySalesRecord.calculateDiscount( quantity ), mySalesRecord.calculateAmount() )

Program.out.println( “Thank you for Purchasing with us!” )

Finest answer:

Answer by Sayee
Initial, Thanks for the question! It took about 10 min prior to I spotted the mistake!
when employing double
do not do discount = 5 / ten * itemPrice
USE discount = 5. / ten. * itemPrice

adjust all numbers with an additional . in all the calculation lines related to above and it should work fine!

Hope it helps.

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