Exercise 3.3

public class BankAccount
{
    public static void main (String[] args) {
        BankAccount diddle = new BankAccount();
        diddle.deposit(1000);
        diddle.withdraw(500);
        diddle.withdraw(400);
        System.out.println(balance);
        System.out.println("expected: 100");

    }
    private static double balance;{

    }

    public void deposit(double amount) {
        balance = balance + amount;

    }

    public void withdraw(double amount) {
        balance = balance - amount;
    }

    public static double getBalance() {
        return balance;



    }

}