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计算命令行上提供的参数的总和. Scala

计算命令行上提供的参数的总和. Scala

#scala

总和参数

Scala

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object Main {
  def main(args: Array[String]) {
    try {
      val elems = args map Integer.parseInt
      println("The sum of my arguments is: " + elems.foldRight(0) (_ + _))
    } catch {
      case e: NumberFormatException => 
        println("Usage: scala Main <n1> <n2> ... ")
    }
  }
}

Scala

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