Money program

[KoreyAusTex]

I am having a very hard time making this program work right, I am sort of lost and I was wondering if I might get some advice.

This is what I have so far but I have a rounding error when I use the amount 10.03:

public class Money
{ 
    public static void main(String[] args)
    { 
        double TOTAL_AMOUNT = 10.03;
 
        int money = (int)(TOTAL_AMOUNT * 100);
 
        System.out.println("Your money amount " + TOTAL_AMOUNT + " consists of");
 
        System.out.println("\t" + (money / 100) + " dollars");
 
        money = money % 100;
 
        System.out.println("\t" + (money / 25) + " quarters");
        money = money % 25;
 
        System.out.println("\t" + (money / 10) + " dimes");
        money = money % 10;
 
        System.out.println("\t" + (money / 5) + " nickels");
        money = money % 5;
 
        System.out.println("\t" + (money / 1) + " pennies");
    }
}

I know Math.round() is a useful class but can't figure how to put it in my program

[Ganon11]

Do you need to use a floating point (decimal) number to hold the money? I see you immediately convert it to an integer - maybe you should just start with an integer.

[hollywood115]

You're problems is that you're not using Math.round.

just replace:
int money = (int)(TOTAL_AMOUNT * 100);
with:
int money = (int)Math.round(TOTAL_AMOUNT * 100);

it should round a lot more accurately now, try it out.

hope it helps :)

I am having a very hard time making this program work right, I am sort of lost and I was wondering if I might get some advice.

This is what I have so far but I have a rounding error when I use the amount 10.03:

public class Money
{ 
    public static void main(String[] args)
    { 
        double TOTAL_AMOUNT = 10.03;
 
        int money = (int)(TOTAL_AMOUNT * 100);
 
        System.out.println("Your money amount " + TOTAL_AMOUNT + " consists of");
 
        System.out.println("\t" + (money / 100) + " dollars");
 
        money = money % 100;
 
        System.out.println("\t" + (money / 25) + " quarters");
        money = money % 25;
 
        System.out.println("\t" + (money / 10) + " dimes");
        money = money % 10;
 
        System.out.println("\t" + (money / 5) + " nickels");
        money = money % 5;
 
        System.out.println("\t" + (money / 1) + " pennies");
    }
}

I know Math.round() is a useful class but can't figure how to put it in my program

[BigDaddyLH]

Loose the doubles and use ints -- cents.

[KoreyAusTex]

Loose the doubles and use ints -- cents.

My professor wanted it in the format of 10.03 or 15.34. She didn't let us break it up, if I understand you correctly?

[BigDaddyLH]

My professor wanted it in the format of 10.03 or 15.34. She didn't let us break it up, if I understand you correctly?

Well, I'm not sure to say since I don't know the whole story, but if I were writing the program for my own benefit, I would work with ints, and merely format the output to look "15.34".

If you have time, ask your professor to clarify things for you.

[missdaisy14]

This is very helpful. But what if the output is 0 and you don't want it to show in the results?

[Nepomuk]

You can always catch specific cases with an if branch. When working with integers, you'd simply put something like this:

if(money / 25 > 0) {
    System.out.println("\t" + (money / 25) + " quarters");
}

You could even use an if-else structure to give a more natural response:

if(money / 25 > 0) {
    System.out.println("\t" + (money / 25) + " quarters");
} else {
    System.out.println("\tNo quarters");
}

There are shorter ways of doing this, but this is the easiest to understand.