萧霍

 ```scala package org.app package

```scala package org.app package ui import scala.io.StdIn class LibrarayPresentation { // 显示游客的菜单 de

```scala package org.app import scala.io.StdIn object Main { def main(args: Array[String]): Unit = {

```scala package jh object fx02 { /** * 定义集合（set,list,amp,array）时，通过泛型来传递可以装入的数据类型 */ def main(args:

```scala package jh object fx01 { def getMiddle_Int(arr:Array[Int]):Int = { // 长度/2 arr(arr.length /

```scala package imp object imp03 { class KM(var value:Double){ override def toString: String = s"${

```scala package imp object imp01 { implicit def doubleToInt(x:Double):Int = { println("double to in

```scala package score object score01 { case class Stu(name:String,yuwen:Double,shuxue:Double,yingyu

答案：B A：prvate才是表示私有的，protected表示受保护的 C：private和protected修饰的成员，不能在类的外部通过“对象。属性”直接访问（private完全对外隐藏；pro