Scala访问权限案例：银行账户

//银行账户
class BankAccount(private var balance:Int){
  def showMoney(): Unit ={
    println(s"现在的余额是：${balance}")
  }
  def deposit(money:Int): Unit ={
    balance += money
  }
  def withdraw(money:Int): Unit ={
    if(money <= balance)
      balance -= money
  }
  //转账
  def transfer(to:BankAccount,money:Int): Unit ={
    
  }
}


object Test24 {
  def main(args: Array[String]): Unit = {
    var xiaoming = new BankAccount(0)
    var xiaohua = new BankAccount(100)
    //存入200
    xiaohua.deposit(200)
    //取出150
    xiaohua.withdraw(150)
    //转账给小明
    xiaohua.transfer(xiaohua,100)

    xiaohua.showMoney()
    xiaoming.showMoney()
  }
}