parkingMachine

/*
  This is a simulation program made for a parking machine
  It generates a random payment between $15 and $30
  It has to ask the user if he wants to pay with coins of
  $10, $5, $2, or $1 (Mexico's coins)
  Then show that the debt is paid or not and the change
*/

import java.io.IOException;

public class parkingMachine 
{

	public static void main(String[] args) throws IOException
	{
		char pay;
		int payment, coin=10, i=1;
		
		payment = (int) (Math.random()*15+15);

		System.out.println("The payment is: $"+payment);

		while(payment>0)
		{
			System.out.println("Do you want to pay with a  $"+coin+" coin?");
			pay = (char)System.in.read();
			System.in.read();
			System.in.read();
			
			if(pay == 's' || pay == 'S')
			{
				payment-=coin;
				System.out.println("The payment is: $"+payment);
				pay = 'n';
				coin = 10;
				i = 1;
				continue;
			}
			
			else if((pay != 's' || pay != 'S') && i==4)
			{
				System.out.println("Your payment is not complete, you owe $"+payment);
				break;
			}
			
			switch (i)
			{
			case 1 :
				coin = 5;
				break;
			case 2 :
				coin = 2;
				break;
			case 3 :
				coin = 1;
			}
			i++;
		}	
		if(payment <= 0)
		{
			System.out.println("Your payment has been covered, your change is: $" +(payment*-1));	
		}		
	}
}