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Thread: program : giving back change with dollars, dimes and pennies

  1. #1
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    Default program : giving back change with dollars, dimes and pennies

    When I run it , it wont print out the nickels and pennies.

    I was asked to only put the input in pennies...




    package givingChange;
     
    import javax.swing.JOptionPane;
     
    public class givingChange {
     
     
    	public static void main(String[] args) {
     
     
    		String amount;
    		int price, paid, change;
    		int dollars, quarters, dimes, pennies, nickels;
     
     
    		// In pennies
    		 amount=
    			 JOptionPane.showInputDialog("Enter amount due");
    		  price = Integer.parseInt(amount);
    		 amount=
    			 JOptionPane.showInputDialog("Enter amount paid");
    		 paid = Integer.parseInt(amount);
     
     
     
    		 change = paid - price;
     
     
    		 dollars = change/100;
    		 int left= change%100;
     
    		 quarters = left/25;
    		 left= left%25;
     
    		 dimes = left/10;
    		 left=left%10;
     
    		 nickels = left/5;
    		 left = left%5;
     
    		 pennies = left/1;
     
    		 if (dollars>0)
    		{ System.out.println(dollars+" dollars"); }
    		if (quarters>0)
    		 {System.out.println(quarters+ " quarters");}
    		 if (dimes>0)
    		 {System.out.println(dimes+" dimes");
    		 if  (nickels>0)
    		 {System.out.println(nickels+ " nickels");}
    		 if (pennies>0)
    		 {System.out.println(pennies+" pennies");}
     
     
    	}
     
    	}
    }
    Last edited by hellynam; September 24th, 2012 at 10:21 PM.


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: program : giving back change with dollars, dimes and pennies

    Please Edit your post and wrap your code with
    [code=java]
    <YOUR CODE HERE>
    [/code]
    to get highlighting and preserve formatting.

    it wont print out the nickels and pennies
    Their values must be 0. Check your code and logic to be sure your formulas are correct.

    Try debugging the code by printing out the values of the variables as they are changed. For example print out the value of left after every time it is assigned a new value. The print out will show you where your formulas are going wrong.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: program : giving back change with dollars, dimes and pennies

    Quote Originally Posted by hellynam View Post
    When I run it , it wont print out the nickels and pennies
    Maybe if you adopt a style with consistent indentation to emphasize control structures you might avoid certain problems like this.

    I mean, the compiler ignores these stylistic niceties, but for humans, there is a reason that experienced programmers often get in the habit of making their code look "neat" in a more-or-less standard form.

    1. Each block should start and end in the same column.

    2. Inner Block contents are indented more than outer blocks.

    3. For emphasis, sometimes people put comments at the closing '}' of some of the blocks.

    4. Judicious (and consistent) use of whitespace sometimes makes things more readable or at least more attractive...


    One style that seems to be popular with Java programmers might make your code look like the following:
    package givingChange;
     
    import javax.swing.JOptionPane;
     
    public class GivingChange {
     
        public static void main(String [] args) {
            String amount;
            int price, paid, change;
            int dollars, quarters, dimes, pennies, nickels;
     
            amount = JOptionPane.showInputDialog("Enter amount due");
            price = Integer.parseInt(amount);
     
            amount = JOptionPane.showInputDialog("Enter amount paid");
            paid = Integer.parseInt(amount);
     
            change = paid - price;
     
            dollars = change / 100;
            int left = change % 100;
     
            quarters = left / 25;
            left = left % 25;
     
            dimes = left / 10;
            left = left % 10;
     
            nickels = left / 5;
            left = left % 5;
     
            pennies = left / 1;
     
            if (dollars > 0) {
                System.out.println(dollars + " dollars");
            } // End of "if (dollars...)"
            if (quarters > 0) {
                System.out.println(quarters +  " quarters");
            } // End of "if (quarters...)"
            if (dimes > 0) {
                System.out.println(dimes + " dimes");
                if (nickels > 0) {
                    System.out.println(nickels + " nickels");
                }
                if (pennies > 0) {
                    System.out.println(pennies +  " pennies");
                }
            } // End of "if (dimes...)"
        } // End of main()
    } // End of class definition


    Cheers!

    Z
    Last edited by Zaphod_b; September 25th, 2012 at 01:40 PM.

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