Change Calculator

README.md

Change Calculator

Description

Change.java is a simple Java program designed to assist cashiers by calculating the total cost of an item, including sales tax, and determining the change due to the customer. It provides a summary of all relevant figures, ensuring a quick and accurate checkout process.

Features

• Prompts the user to enter the cost of an item.
• Applies a 6% sales tax to the item cost.
• Calculates the total cost, including tax.
• Prompts for the amount tendered by the customer.
• Outputs a summary showing:
  • Original cost of the item
  • Sales tax amount (6%)
  • Total cost with tax
  • Amount tendered by the customer
  • Change due to the customer

Usage

1. Compile the program:

javac Change.java

2. Run the program:

java Change

3. Follow the prompts:

• Enter the cost of the item (e.g., 10.00).
• Enter the amount tendered by the customer (e.g., 20.00).

4. View the output summary, which should look similar to:

Enter the cost of the item: 10.00
Enter the amount tendered by the customer: 20.00

--- Summary ---
Item Cost: $10.00
Sales Tax (6%): $0.60
Total with Tax: $10.60
Amount Tendered: $20.00
Change Due: $9.40

Example Output

Enter the cost of the item: 15.00
Enter the amount tendered by the customer: 20.00

--- Summary ---
Item Cost: $15.00
Sales Tax (6%): $0.90
Total with Tax: $15.90
Amount Tendered: $20.00
Change Due: $4.10

Notes

• Ensure that the amount tendered by the customer is equal to or greater than the total cost. Otherwise, the change due will be a negative value, indicating an insufficient payment.
• Modify the taxRate variable in the code if a different sales tax rate is required.

Change.java

import java.util.Scanner;

/**
 *
 * @author Mark
 */
public class Change {
    private final double tax = 0.06;
    private double cost;
         
    private double payment;
    
    public double getCost() {
        return this.cost;
    }
    
    public double getTax() {
        return this.tax;
    }
    
    public double getPayment() {
        return this.payment;
    }
    
    public void setCost(double cost) {
        this.cost = cost;
    }
    
    public void setPayment(double payment) {
        this.payment = payment;
    }
    
    public static void main (String [] args) {
        Scanner scan = new Scanner(System.in);
        System.out.print("Enter the cost of the item: ");
        double cost = scan.nextDouble();
        System.out.print("Enter the amount tendered by the customer: ");
        double payment = scan.nextDouble();
        
        Change change = new Change();
        change.setCost(cost);
        change.setPayment(payment);
        
        System.out.println("--- Summary ---");
        System.out.println("Item Cost: " + change.getCost());
        
        // Convert double value (0.06) to its integer equivallent (6)
        // so we can display it as "6%"
        int taxPercent = (int) (change.getTax() * 100);
        double taxedAmount = change.getTax() * change.getCost();
        System.out.println("Sales Tax (" + taxPercent + "%): " + taxAmount);
        
        // Calcualte total with tax by adding cost and taxedAmount
        double totalWithTax = cost + taxedAmount;
        System.out.println("Total with Tax: " + totalWithTax);
        
        System.out.println("Amount Tendered: " + payment);
        
        // Calculate Change Due by subtracting payment with totalWithTax
        double changeDue = payment - totalWithTax;
        System.out.println("Change Due: " + changeDue);
    }
}