class Account {
	private double balance;
	private String password;
	public Account(double initBalance, String pw) {
		balance = initBalance;
		password = pw;
	}
	public Account(String pw) {
		balance = 0;
		password = pw;
	}
	public double getBalance(String pw) {
		if (!password.equals(pw)) {
			System.err.println("Unauthorized!");
			System.exit(1);
		}
		return balance;
	}
	public void withdraw(double amt, String pw) {
		if (!password.equals(pw)) {
			System.err.println("Unauthorized!");
			System.exit(1); // end program
		}
		if (amt <= 0) {
			System.err.println("Amount must be positive");
			return; // end method
		}
		if (balance < amt) {
			System.err.println("Insufficient funds");
			return; // end method
		}
		balance = balance - amt;
	}

	public void deposit(double amt, String pw) {
		if (!password.equals(pw)) {
			System.err.println("Unauthorized!");
			System.exit(1); // end program
		}
		if (amt <= 0) {
			System.err.println("Amount must be positive");
			return; // end method
		}
		balance = balance + amt;
	}

}

public class TestAccount {

	public static void main(String[] args) {
		Account checking = new Account(100, "boat");
		checking.withdraw(20, "boat");
		System.out.println("balance = $" + checking.getBalance("boat"));
		checking.withdraw(200, "boat");
		System.out.println("balance = $" + checking.getBalance("boat"));
		checking.withdraw(-20, "boat");
		System.out.println("balance = $" + checking.getBalance("boat"));
		checking.withdraw(20, "boot");
		System.out.println("balance = $" + checking.getBalance("boat"));
	}
}