Member Avatar for bcheath_1

I have attached my current source code to this message. It is in .java format.

Here is a brief description of my problem:

I have a program which accepts input for a Purchase Price, an Amount Tendered, and then displays the Change Due. Also, it must display the number of dollars, quarters, dimes, nickels, and pennies. The input is complete and I can calculate the Change Due, but I cannot figure out how to calculate each piece of change individually.

Note: The output is not in the code, but I know how to properly write it, so I won't need any help with output

Thanks in advance for any help:


Also, here is the look my application is to have:

Purchase Price: $ ________ (completed)
Amount Tendered: $ ________ (completed)

Your change is: $ ________ (completed)

__ one dollar bill (s)
__ quarter (s)
__ dimes (s)
__ nickel (s)
__ penn (y/ies)


Thank you for your business. Come back soon. (completed)

/* 
     Chapter 3: Exercise 24, pg.146
     
     Problem:  Develop an application that reads a purchase price and an amount tendered and then 
	  displays the change in dollars, quarters, dimes, nickels, and pennies.  Two input values are
	  entered in cents, for example, 3480 for $34.80 and 70 for $0.70
	  
	  Note:  The input values are to be entered in cents (int data type), but the echo-printed values
	  must be displayed with decimal points (float data type).
*/


import javax.swing.*;
import java.text.*;

class Exercise3_24 {

     public static void main( String[] args ) {


          //Instatiate objects that will be used
	 		 final int			PENNY_PER_DOLLAR     = 100,
			 						DIMES_PER_DOLLAR     = 10,
									NICKLES_PER_DOLLAR   = 20,
									QUARTERS_PER_DOLLAR  = 4;
			 
			 final double		PRICE_OF_PENNY     = .01,
			 						PRICE_OF_NICKEL    = .05,
									PRICE_OF_DIME      = .10,
									PRICE_OF_QUARTER   = .25;	
												
			 String				purchaseStr, cashStr;
			 
			 int					purchaseAmt, paidAmt;
			 
			 float				purchasePrice, amountTendered, changeDue;	
			 
			 DecimalFormat    df1 = new DecimalFormat("0.00");
			 
			 								
	  		 //Retrieve purchase price from teller
	  
	  		 purchaseStr =  JOptionPane.showInputDialog(null, "Enter purchase price. (In pennies) ");

	  		 purchaseAmt =  Integer.parseInt(purchaseStr);

	  
	  		 //Retrieve total amount tendered
	  
	  		 cashStr =  JOptionPane.showInputDialog(null, "Enter amount tendered. (In pennies) ");

	 		 paidAmt =  Integer.parseInt(cashStr);

	  
	  		 //Convert int data type to float data type
			 			 
			 purchasePrice  = (float)(purchaseAmt * PRICE_OF_PENNY);
			 
			 amountTendered = (float)(paidAmt * PRICE_OF_PENNY);
			 
						 
			 //Calculat change to be returned
			 
			 changeDue 		 = amountTendered - purchasePrice;

			 
			 
			 //Display the change in dollars, quarters, dimes, nickels, and pennies
			 
			 System.out.println("Purchase Price:     $ " + df1.format(purchasePrice));
			 System.out.println("Amount Tendered:    $ " + df1.format(amountTendered));
			 System.out.println("");
			 
			 System.out.println("Your change is:     $ " + df1.format(changeDue));
			 					  
	}
}
  • 6 Contributors
  • 8 Replies
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  • 7 Months Discussion Span
  • Latest Post Latest Post by cdpothen
Member Avatar for server_crash

How come you prompt the user for amount in pennies?

Member Avatar for bcheath_1

Well as you can see in the problem message in the source code, it is required. This is a homework assignment, so I have to do what the instructor says. I hope that explanation helps.

Member Avatar for jwenting

So all you need to do is find out how to most efficiently give change?

How do you determine what combination of coins and bills to use in a store? All you have to do is put that reasoning into code.

Say you give $1.26 in change.
How many dollars is that?
When those are gone, how many quarters are there in the leftover amount?
etc. etc. etc.

It's not hard.

Member Avatar for Gink

nested loops

Member Avatar for jwenting

recursive function would be my choice. Far cleaner.

Member Avatar for fiberoptik

I have to do the same basic problem. My prof. said to use integer division & modulus to find the amount for each coin in nested if loops. How to write it is the next big headache.

Member Avatar for fiberoptik

I have to do the same basic problem. My prof. said to use integer division & modulus to find the amount for each coin in nested if loops. How to write it is the next big headache.We're to specify if the coin is singular/plural also.

Member Avatar for cdpothen

I tried working on this and this was my solution. Not very great maybe, i hope its of use to you

/*
 * Main.java
 *
 * Created on 09 September 2005, 11:00
 *
 * To change this template, choose Tools | Options and locate the template under
 * the Source Creation and Management node. Right-click the template and choose
 * Open. You can then make changes to the template in the Source Editor.
 */

package javaapplication1;
import javax.swing.*;
import java.text.*;
import java.math.*;
/**
 *
 * @author VABRAHAM
 */
public class Main {
    
   
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        System.out.println("kidiluu");

          //Instatiate objects that will be used
	 		 final int			PENNY_PER_DOLLAR     = 100,
			 						DIMES_PER_DOLLAR     = 10,
									NICKLES_PER_DOLLAR   = 20,
									QUARTERS_PER_DOLLAR  = 4;
			 
			 final double		PRICE_OF_PENNY     = .01,
			 						PRICE_OF_NICKEL    = .05,
									PRICE_OF_DIME      = .10,
									PRICE_OF_QUARTER   = .25,
                                                                        PRICE_OF_DOLLAR    =  1;
												
			 String				purchaseStr, cashStr;
			 
			 int					purchaseAmt, paidAmt;
			 
			 float	purchasePrice, amountTendered, changeDue;	
                         float dollars =0;
                         float quarters = 0;
                         float dimes = 0;
                         float nickels = 0;
                         float pennies = 0;
                         float temp = 0;
			 
			 DecimalFormat    df1 = new DecimalFormat("0.00");
			 DecimalFormat    df2 = new DecimalFormat("0");
			 								
	  		 //Retrieve purchase price from teller
	  
	  		 purchaseStr =  JOptionPane.showInputDialog(null, "Enter purchase price. (In pennies) ");

	  		 purchaseAmt =  Integer.parseInt(purchaseStr);

	  
	  		 //Retrieve total amount tendered
	  
	  		 cashStr =  JOptionPane.showInputDialog(null, "Enter amount tendered. (In pennies) ");

	 		 paidAmt =  Integer.parseInt(cashStr);

	  
	  		 //Convert int data type to float data type
			 			 
			 purchasePrice  = (float)(purchaseAmt * PRICE_OF_PENNY);
			 
			 amountTendered = (float)(paidAmt * PRICE_OF_PENNY);
			 
						 
			 //Calculat change to be returned
			 
			 changeDue 		 = amountTendered - purchasePrice;

			 
			 
			 //Display the change in dollars, quarters, dimes, nickels, and pennies
			 
			 System.out.println("Purchase Price:     $ " + df1.format(purchasePrice));
			 System.out.println("Amount Tendered:    $ " + df1.format(amountTendered));
			 System.out.println("");
			 
			 System.out.println("Your Balance is:     $ " + df1.format(changeDue));
                         //calculating dollars
                         if(changeDue%(PRICE_OF_DOLLAR)==0){
                            dollars = changeDue;
                         }else {
                             dollars = changeDue - (float)(changeDue%PRICE_OF_DOLLAR);
                         }
                         //calculating quarters
                         changeDue = (float)(changeDue%PRICE_OF_DOLLAR);
                         //System.out.println(" change due here" + changeDue );
                                 
                         if(changeDue%(PRICE_OF_QUARTER)==0){
                            quarters = changeDue/(float)PRICE_OF_QUARTER;
                            //System.out.println("here");
                         }else {
                            quarters = (changeDue - (float)(changeDue%PRICE_OF_QUARTER))/(float)PRICE_OF_QUARTER;
                            //System.out.println("here111");
                         }
                         
                         //calculating dimes
                         changeDue = (float)(changeDue%PRICE_OF_QUARTER);
                         System.out.println(" change due here" + changeDue );
                                          
                         if(changeDue%(PRICE_OF_DIME)==0){
                            dimes = changeDue/(float)PRICE_OF_DIME;
                            System.out.println("here dimes is" + dimes);
                         }else {
                            dimes = (changeDue - (float)(changeDue%PRICE_OF_DIME))/(float)PRICE_OF_DIME;
                            System.out.println("here111 here dimes is" + dimes);
                         }
                         
                         //calculating nickels

                         changeDue = (float)(changeDue%PRICE_OF_DIME);
                         System.out.println(" change due here in two " + changeDue );
                                          
                         if(changeDue%(PRICE_OF_NICKEL)==0){
                            nickels = changeDue/(float)PRICE_OF_NICKEL;
                            System.out.println("here in kuttus");
                         }else {
                            nickels = (changeDue - (float)(changeDue%PRICE_OF_NICKEL))/(float)PRICE_OF_NICKEL;
                            System.out.println("here111 in pittus " + nickels);
                         }                         

                         //calculating pennies

                         changeDue = (float)(changeDue%PRICE_OF_NICKEL);
                         System.out.println(" change due here tulley " + changeDue );
                         pennies = changeDue / (float)PRICE_OF_PENNY;
                       
                       
                        System.out.println("You get " + df2.format(dollars)+ " dollars" );
                        System.out.println("You get " + df2.format(quarters) + " quarters " );
                        System.out.println("You get " + df2.format(dimes) + " dimes " );
                        System.out.println("You get " + df2.format(nickels) + " nickels " ); 
                        System.out.println("You get " + df2.format(pennies) + " pennies " );
    }
}
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