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")}

}