DevX Home Today's Headlines   Articles Archive   Tip Bank   Forums

# Thread: Almost got it need something to stop program!

#### Hybrid View

1. Registered User
Join Date
Apr 2005
Location
IA
Posts
5

## Almost got it need something to stop program!

Hey there you all have been a super help. Heres my program. I have it all but how to stop if the user enters -99. I can't seem to figure out that part. Here is the assignment instructions:

Change this program to repeat until you enter a -99 for the quantity. Otherwise verifiy that the quantity is 1-100 inclusive and that the price is \$1.00 or more but less than \$100.00. If the entry is incorrect, keep repeating the request for that portion of the data until a correct value is entered. Display an error message if the entry is incorrect. Order of data being entered is up to you.

/**
* Loop exercise
* prompt for name of purchase item, quantiy, price,
* calculate the total including tax and display in one line
* continue until -99 error by user.
* @author (Donna Jones)
* @version (April 25th)
*/

import java.util.Scanner;
import java.text.NumberFormat;

public class editpurchase
{
//-----------------------------------------------------------------
// Calculates the total price of items includes quantity, item name
// cost per item, total cost including tax. Edits to tell user of incorrect
// input, printing error message and request re-entry
//-----------------------------------------------------------------
public static void main (String[] args)
{
final double TAX_RATE = 0.06; // 6% sales tax

String Item;
int quantity;
double subtotal,totalcost,unitPrice;

Scanner scan = new Scanner (System.in);

NumberFormat fmt1 = NumberFormat.getCurrencyInstance();
NumberFormat fmt2 = NumberFormat.getPercentInstance();

//PROMPTING FOR USER INPUT
do
{
System.out.print ("Enter the name of your item: ");
Item = scan.next();

do
{
System.out.print ("Enter the quantity: ");
quantity = scan.nextInt();

if (quantity < 0 || quantity >100) //less than zero & greater 100 print out following error message
{ System.out.println ("You've keyed an invalid quantity: Enter number between 1-100");
}
} while (quantity < 0 || quantity >100);

do
{
System.out.print ("Enter the unit price: ");
unitPrice = scan.nextDouble();

if (unitPrice < 1.00 || unitPrice > 99.99) //less than one dollar & 99.99 print out following error message
{ System.out.println ("You've keyed an invalid price: Enter a value between 1.00-99.99 ");
}
} while (unitPrice < 1.00 || unitPrice > 99.99);

System.out.println();

subtotal = quantity * unitPrice;
totalcost = (subtotal *TAX_RATE) + subtotal;

System.out.println ("Item purchased is: " + Item+ ". The quantity purchased was " +quantity
+ " the cost per item was: " +fmt1.format(unitPrice) + " for a subtotal of " + fmt1.format(subtotal)
+ " with a total cost of " + fmt1.format(totalcost));

System.out.println();

}
while (quantity !=-99);

}
}

2. Senior Member
Join Date
Feb 2004
Posts
541
you need something like

Code:
```if(quantity == -99)
{
return;
}```
There are other ways you could do it too, but that is the shortest. It will return from the main() method if the quantity is -99

3. Registered User
Join Date
Apr 2005
Location
IA
Posts
5
That if (quantity ==-99)
return

asks for a while statement and does not seem to work

Does any one else have any ideas??

4. Senior Member
Join Date
Feb 2004
Posts
541
What do you mean it asks for a while loop? What I posted has nothing to do with a while loop. Can you post exactly what you tried, and what the error message was?

5. Registered User
Join Date
Apr 2005
Location
IA
Posts
5
okay maybe I am confused as to where exactly I would put that If statement. I thought I would put it under the Quantity Do/while loop. Where would you recommend the statment you wrote goes?

6. Senior Member
Join Date
Feb 2004
Posts
541
do
{
System.out.print ("Enter the quantity: ");
quantity = scan.nextInt();

if(quantity == -99)
{
return;
}

if (quantity < 0 || quantity >100) //less than zero & greater 100 print out following error message
{ System.out.println ("You've keyed an invalid quantity: Enter number between 1-100");
}
} while (quantity < 0 || quantity >100);

#### Posting Permissions

• You may not post new threads
• You may not post replies
• You may not post attachments
• You may not edit your posts
•

 FAQ Latest Articles Java .NET XML Database Enterprise