事

// default condition: string is not empty, not inclusive! 
class TermLines (cond: (String => Boolean) = _ != "") extends Iterator[String] { 
  var s = readLine; 
  def hasNext = cond(s); 
  def next = { var r = s; s = readLine; r } 
}

字符串
那就叫它

println((new TermLines).toVector.mkString("\n")) // till empty

型
或

println(new TermLines(_ != ".").toVector.mkString("\n")) // till last is dot

型

解决了！

import scala.io.StdIn

object Solution extends App
{
    val numOfLines = StdIn.readInt()
    def words: Seq[String] = for (_ <- 1 to numOfLines) yield StdIn.readLine()
    def sort = words.map
    {
        case word => word
    }
    sort.foreach(println)
}

字符串