内部累

object 山东理工大学c {
  class Car() {
    var wheel:Int=3
    def run():Unit={
      println("run.....")
    }
    class Engin() {
      val power:Int=12
    }
  }
  def main(args :Array[String]):Unit={
    val c1=new Car();
    var eng =new c1.Engin()
    println(eng.power)
  }