SWSales

/* A software company sells a package that retails for $99. Quantity discounts are given according to the
 * the following table: 
 *
 * Quantity         Discount
 *   10-19            20%    
 *   20-49            30%
 *   50-99            40%
 *   100 or more      50%
 *
 * Write a program that asks the user to enter the number of packages purchased. The 
 * program should then display the amount of the discount (if any) and the total amount of the 
 * purchase after the discount. 
 *
 */
 

import javax.swing.JOptionPane;
 
public class SoftwareSales1
{
   public static void main(String [] args)
   {
	   	double price = 99;
	   	int quantity;
	   	double orderAmount = 0;
	   	double discountAmount = 0;
	   	double totalAmount = 0; 
	   	String inputQuantity;
	   	String output;
	   	
	   	//user's input
   		inputQuantity = JOptionPane.showInputDialog("Enter the quantity of packages: ");
   		quantity = Integer.parseInt(inputQuantity);
   	
   		if (quantity < 10)
	    {
   			orderAmount = price * quantity;
	        discountAmount = price * 0;
   			totalAmount = orderAmount - discountAmount;
	    }
   		
   		else if (quantity >= 10 && quantity <= 19)
	    {
   			orderAmount = price * quantity;
	        discountAmount = 0.20 * orderAmount;
   			totalAmount = orderAmount - discountAmount;
	    }
	    
   		else if (quantity >= 20 && quantity <= 49)
	    {
   			orderAmount = price * quantity;
	    	discountAmount = 0.30 * orderAmount;
   			totalAmount = orderAmount - discountAmount;
	    }
	    else if (quantity >= 50 && quantity <= 99)
	    {
	    	orderAmount = price * quantity;
	    	discountAmount = 0.40 * orderAmount;
   			totalAmount = orderAmount - discountAmount;
	    }
	    
	    else if (quantity >= 100)
	    {
	    	orderAmount = price * quantity;
	    	discountAmount = 0.50 * orderAmount;
   			totalAmount = orderAmount - discountAmount;
	    } 
    			
		output = String.format("Order amount: $%,.2f.\nDiscount amount: $%,.2f.\nTotal amount: $%,.2f.", 
					quantity, orderAmount, discountAmount, totalAmount);
		JOptionPane.showMessageDialog(null,output);
		
		System.exit(0);
	}  
}