java help for newbie

[groove04]

need to have an input of money to pay for an item and amount given.

to return change due with denomination format:

20 dollar bills
10 dollar bills
5 dollar bills
1 dollar bills
quarters
nickels, dimes, pennies, etc.

so far i got this:

import java.util.Scanner;



public class Cashier
{


//*****************************************************************
// Creates change to be given to customer from cashier.
//*****************************************************************


public static void main(String[] args)
{
double a;
double b;


Scanner scan = new Scanner (System.in);
System.out.print ("Enter total amount:$ ");
a = scan.nextDouble();


System.out.print ("Enter amount given:$ ");
b = scan.nextDouble();


System.out.print ("Change:$" + (b - a)  );



}
}

[iamthwee]

First, before you do any programming, grab a piece of paper and plan what you think should happen.

You need to devise an algorithm to give the least number of coins when you get change from a note.

When you've got that then we shall sort out your program. :eek:

[groove04]

import java.util.Scanner;



public class Cashier
{


//*****************************************************************
// Creates change to be given to customer from cashier.
//*****************************************************************


public static void main(String[] args)
{
double a;
double b;


Scanner scan = new Scanner (System.in);
System.out.print ("Enter Total Price: $");
a = scan.nextDouble();


System.out.print ("Enter Payment: $");
b = scan.nextDouble();
System.out.println();
System.out.println ();
System.out.println ("Total Price:         $" + a);
System.out.println ("Your Payment:        $" + b);


System.out.print ("Change:              $" + (b - a)  );



}
}

[Phaelax]

Here's some tips. Represent the total amount of money in cents. Represent the $20,$5,$10,$1 in cents as well. Start with the largest denomination you need to find, $20, and work down from there. Use modulus.

$20 = 2,000 cents

$56.73 = 5,673 cents

It'll be easier working with the whole numbers.