第二： scala 方法定义

 def dowhiles() {
    var line = ""
      do {
        line = readLine()
        println(line + "::line")
      } while ( line != "")
  }

  def loopun(x: Long, y: Long) : Long ={
      var a = x
      var b = y
      while ( a != 0){
        val temp = a
        a = b % a
        b = temp
      }
    b
  }

def main(args: Array[String]) {

dowhiles

val files = (new File(".")).listFiles()
for (fs <- files){
  println(fs+"-----<fs")
}

}