sumcol.scala-2.scala

来自「JAVA 语言的函数式编程扩展」· SCALA 代码 · 共 22 行

/*
 * The Computer Language Shootout
 * http://shootout.alioth.debian.org/
 *
 * contributed by Andrei Formiga
 */

/* functional version */
object sumcol
{
  def sumFile(res: int): int = 
  {
    val line = Console.readLine
    if (line == null) res else sumFile(res + Integer.parseInt(line))
  }

  def main(args: Array[String]) = 
  {
    Console.println(sumFile(0).toString())
  }
}