在抽象基类里定义属性

object soyo{
  abstract class Animal{
    val animal_name:String
    var  age:Int
    val text_string:String="textname"
  }
  class pet extends Animal{
    val animal_name: String ="pig"
    var age=10
    override val text_string: String = "text_name"
  }
  def main(args: Array[String]): Unit = {

        val s=new pet
      println(s.animal_name)
    println(s.age)
     println(s.text_string)
  }
}