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Question by Jaix: Write a program in Java to get a sales document program that computes and prints the low cost to get a products?
I’m new to java but i’m sorta stuck,Office 2007 Ultimate! The system should choose from four items. Based on the quantity ordered, if the quantity is 20 )

discount = 15 / 100 * itemPrice;
else if( order = 11 )

discount = 10 / 100 * itemPrice;
else if( order = 6 )

discount = 5 / 10 * itemPrice;
else

discount = 0;
return low cost;
}
public double calculateAmount()
double amount;
amount = itemPrice – discount;
return amount;
}
The main method code:
/*
* To change this template, choose 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 main(String[] args) {
// TODO code application logic here
int itemNumber = 0;
int quantity;
String itemName = “”;
double price = 0;
Scanner input = new Scanner( System.in );
System.out.println( “CURRENT ITEMS IN STOCK ARE LISTED BELOW:\n” );
System.out.println( “Item Number\t Item Name” );
System.out.println( “1)\t\t Dell 15\” Laptop\n2)\t\t HP Mini NoteBook\n3)\t\t Sony VIAO 12\” Tablet\n4)\t\t Apple MacBook Air” );
System.out.print( “\nEnter Desired Item Number: ” );
itemNumber = input.nextInt();
if( itemNumber == 1 )

price = 500;
itemName = “Dell Laptop”;
System.out.println( “You selected Dell 15\” Laptop\n” );
else if( itemNumber == 2 )

price = 400;
itemName = “HP NoteBook”;
System.out.println( “You selected HP Mini NoteBook\n” );
else if( itemNumber == 3 )

price = 800;
itemName = “Sony Tablet”;
System.out.println( “You selected Sony VIAO 12\” Tablet\n” );
else if( itemNumber == 4 )

price = 1300;
itemName = “MacBook Air”;
System.out.println( “You selected Apple MacBook Air\n” );
else

System.out.println( “Invalid Item Number Entered!” );
System.out.print( “Enter Desired Quantity: ” );
quantity = input.nextInt();
SalesRecord mySalesRecord = new SalesRecord( price );
Program.out.println();
Program.out.println( “ITEM NUMBER\tITEM NAME\tQUANTITY\tPRICE ($ )\tDISCOUNT ($ )\tAMOUNT ($ )\n” );
System.out.printf( “%d\t\t%s\t%d\t\t%.2f\t%.2f\t\t%.2f\n\n”, itemNumber, itemName,Windows 7 Ultimate, quantity,Buy Windows 7, mySalesRecord.getItemPrice(),
mySalesRecord.calculateDiscount( quantity ), mySalesRecord.calculateAmount() );
Technique.out.println( “Thank you for Shopping with us!” );
}
}
Best answer:
Answer by Sayee
First, Thanks for the query! It took about 10 min before I spotted the mistake!
when using double
don’t do discount = 5 / 10 * itemPrice;
USE low cost = 5.0 / 10.0 * itemPrice;
change all numbers with an extra .0 in all the calculation lines similar to above and it should work fine!
Hope it helps.
What do you think? Answer below!