scala类的定义和可变长度参数

class person(name:String) { //带构造函数的类
  val address:String= if (name=="zhang") { //由此例可看出scala是面向表达式的，几乎所有的东西都是表达式
    "Xian"
  }else if(name=="yue"){
    "Yangzhou"
  }else {
    "Beijing"
  }
  val age:Int=23
  def printPerson()= print(name,address,age)
}
//可向方法传入任意多个参数。
object para_varied {
  def bigWrite(args:String*)= {// args类型为Array[String]
    args.map {
      arg => arg.capitalize
    }
  }
    def main(args:Array[String]):Unit={
      println(bigWrite("hello"))
      println(bigWrite("world","hahaha","hello"))
      val arr=Array("what","is","this")
      println(bigWrite(arr:_*))  // :_* 告诉编译器把 arr 的每个元素当作参数，而不是当作单一的参数传给函数 。
      val enny=new person("yue")  //类实例化，new
      enny.printPerson()
    }
}