Change0.java

import java.util.Scanner;

public class Change0 {

  public static void main(String[] args) {
    Scanner input = new Scanner(System.in);

    System.out.print("Item 1 price: ");
    double price1 = input.nextDouble();

    System.out.print("Item 2 price: ");
    double price2 = input.nextDouble();

    System.out.print("Item 3 price: ");
    double price3 = input.nextDouble();

    double total = price1 + price2 + price3;
    System.out.printf("Total is %.02f\n", total);

    System.out.print("Enter amount paid: ");
    double paid = input.nextDouble();

    double owed = paid - total;
    System.out.printf("Change owed: %.02f\n", owed);

    int twenties = (int) (owed / 20);
    owed -= twenties * 20;

    int tens = (int) (owed / 10);
    owed -= tens * 10;

    int fives = (int) (owed / 5);
    owed -= fives * 5;

    int ones = (int) (owed / 1);
    owed -= ones;

    int quarters = (int) (owed / 0.25);
    owed -= quarters * 0.25;

    int dimes = (int) (owed / 0.10);
    owed -= dimes * 0.10;

    int nickels = (int) (owed / 0.05);
    owed -= nickels * 0.05;

    int pennies = (int) (owed / 0.01);
    owed -= pennies * 0.01;

    System.out.printf("%d twenties; %d tens; %d fives; %d ones\n", twenties, tens, fives, ones);
    System.out.printf("%d quarters; %d dimes; %d nickels; %d pennies\n", quarters, dimes, nickels, pennies);
    System.out.printf("Owed: %.16f%n", owed);
  }
}

Change1.java

import java.util.Scanner;

public class Change1 {

  public static void main(String[] args) {
    Scanner input = new Scanner(System.in);

    System.out.print("Item 1 price: ");
    double price1 = input.nextDouble();

    System.out.print("Item 2 price: ");
    double price2 = input.nextDouble();

    System.out.print("Item 3 price: ");
    double price3 = input.nextDouble();

    double total = price1 + price2 + price3;
    System.out.printf("Total is %.02f\n", total);

    System.out.print("Enter amount paid: ");
    double paid = input.nextDouble();

    double owed = paid - total;
    System.out.printf("Change owed: %.02f\n", owed);

    int twenties = (int) (owed / 20);
    owed %= 20;

    int tens = (int) (owed / 10);
    owed %= 10;

    int fives = (int) (owed / 5);
    owed %= 10;

    int ones = (int) (owed / 1);
    owed %= 1;

    int quarters = (int) (owed / 0.25);
    owed %= 0.25;

    int dimes = (int) (owed / 0.10);
    owed %= 0.10;

    int nickels = (int) (owed / 0.05);
    owed %= 0.05;

    int pennies = (int) (owed / 0.01);
    owed %= 0.01;

    System.out.printf("%d twenties; %d tens; %d fives; %d ones\n", twenties, tens, fives, ones);
    System.out.printf("%d quarters; %d dimes; %d nickels; %d pennies\n", quarters, dimes, nickels, pennies);
    System.out.printf("Owed: %.16f%n", owed);
  }
}

Change2.java

import java.util.Scanner;

public class Change2 {

  public static void main(String[] args) {
    Scanner input =  new Scanner(System.in);

    System.out.print("Item 1 price: ");
    int price1 = (int)(input.nextDouble() * 100);

    System.out.print("Item 2 price: ");
    int price2 = (int)(input.nextDouble() * 100);

    System.out.print("Item 3 price: ");
    int price3 = (int)(input.nextDouble() * 100);

    int total = price1 + price2 + price3;
    System.out.printf("Total is %.02f%n", total/100.0);

    System.out.print("Enter amount paid: ");
    int paid = (int)(input.nextDouble() * 100);

    int owed = paid - total;
    System.out.printf("Change owed: %.02f%n", owed/100.0);

    int twenties = owed / 2000;
    owed %= 2000;

    int tens = owed / 1000;
    owed %= 1000;

    int fives = owed / 500;
    owed %= 500;

    int ones = owed / 100;
    owed %= 100;

    int quarters = owed / 25;
    owed %= 25;

    int dimes = owed / 10;
    owed %= 10;

    int nickels = owed / 5;
    owed %= 5;

    int pennies = owed / 1;
    owed %= 1;

    System.out.printf("%d twenties; %d tens; %d fives; %d ones%n", twenties, tens, fives, ones);
    System.out.printf("%d quarters; %d dimes; %d nickels; %d pennies%n", quarters, dimes, nickels, pennies);
    System.out.printf("Owed: %d%n", owed);

  }
}

gistfile1.txt

123.45
345.67
321.99
12345.68