public class Account {
    private double balance;
    
    public Account(double initialBalance) {
        this.balance = initialBalance;
    }
    
    public void withdraw(double amount) throws InsufficientFundsException {
        if (amount > balance) {
            throw new InsufficientFundsException(balance);
        }
        balance -= amount;
        System.out.println("取款成功！当前余额：" + balance);
    }
    
    public double getBalance() {
        return balance;
    }
}