public class BankAccount
{
	private double balance;

	public BankAccount()
	{
		balance = 0;
	}
	public BankAccount(double initialBalance)
	{
		balance = initialBalance;
	}
	public void withdraw(double amount)
	{
		balance = balance - amount;
	}
	public void deposit(double amount)
	{
		balance = balance + amount;
	}
	public double getBalance()
	{
		return balance;
	}
	public void transfer(BankAccount other, double amount)
	{
		withdraw(amount);
		other.deposit(amount);
	}
}