Question

我正在尝试解决UVA在线判断问题，380 - 呼叫转移https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=316 具体来说，我已经设法创建了一个函数，它从问题描述中的示例中给出了正确的答案，我继续编写了包含所有测试用例的文件读取过程，处理每个测试用例的答案并回写结果到文件系统，问题是我可以读取整个文件但由于某种原因有一个特殊的核心功能（“回写”），在计算时没有被调用，但编译器确实编译，我已经查看了代码几次，但我找不到问题，这是我的代码：



    type userSettings = List[Req]
    type callSimulations = List[Array[String]]
    type Juice = (userSettings, callSimulations)

    def calling(time: Double, ext: String, lst: List[Req], nineNine: Set[String]):String = {
    if (nineNine contains ext) "9999"
    else {
      val next = lst.filter(req => req.source == ext && (time >= req.time2 && time <= req.limit))
      println(s"time: $time, ext: $ext and next: $next ")
      if (next == Nil) s"RINGS $ext \n"
      else calling(time, next(0).target, lst, nineNine + ext)
    }
  }

    def getData(input: Iterator[String]): Unit = {

      def writeBack(theSys: Juice, sysNum: Int, output: String): String = {
        val heading = "System $sysNum \n"
        val (uSettings, sim) = theSys // unpack the the system
        val partialResult = sim.map {arr =>
        "AT " + arr(0) + "CALL " + "TO " + arr(1) + calling(parse(arr(0)),arr(1),uSettings,Set[String]())}.mkString("")
  println(heading + partialResult)// doesnt print anything so it's not writting
  output + heading + partialResult

  }
    def rev(x: Juice) = (x._1.reverse, x._2.reverse)

@annotation.tailrec
  def go(in: Iterator[String], acc: Juice, out:String, n: Int): String = {
    if (in.hasNext) {
      val next = in.next.split(" ")
      next match{
        case Array(a,b,c,d) => go(in,(Req(a,b,c,d) +: acc._1, acc._2), out, n)
        case Array(time,ext) => go(in,(acc._1, Array(time,ext) +: acc._2), out, n)
        case Array(cut) if n == "9000" => go(in, (Nil,Nil), writeBack(rev(acc), n , out), n+1)
        case _ => go(in, acc, out, n)
      }
    } else out
  }
  val zero = (Nil,Nil)
  val outFile = new File("path/of/answers.txt")
  if (!outFile.exists()) outFile.createNewFile()
  val bw = new BufferedWriter(new FileWriter(outFile,true))

  bw.write( go(input,zero,"",0) )
  bw.close
}
val file = "path/to/inputFile.txt"
val theIn = io.Source.fromFile(file)

try getData(theIn.getLines) finally theIn.close

type userSettings = List[Req] type callSimulations = List[Array[String]] type Juice = (userSettings, callSimulations) def calling(time: Double, ext: String, lst: List[Req], nineNine: Set[String]):String = { if (nineNine contains ext) "9999" else { val next = lst.filter(req => req.source == ext && (time >= req.time2 && time <= req.limit)) println(s"time: $time, ext: $ext and next: $next ") if (next == Nil) s"RINGS $ext \n" else calling(time, next(0).target, lst, nineNine + ext) } } def getData(input: Iterator[String]): Unit = { def writeBack(theSys: Juice, sysNum: Int, output: String): String = { val heading = "System $sysNum \n" val (uSettings, sim) = theSys // unpack the the system val partialResult = sim.map {arr => "AT " + arr(0) + "CALL " + "TO " + arr(1) + calling(parse(arr(0)),arr(1),uSettings,Set[String]())}.mkString("") println(heading + partialResult)// doesnt print anything so it's not writting output + heading + partialResult } def rev(x: Juice) = (x._1.reverse, x._2.reverse) @annotation.tailrec def go(in: Iterator[String], acc: Juice, out:String, n: Int): String = { if (in.hasNext) { val next = in.next.split(" ") next match{ case Array(a,b,c,d) => go(in,(Req(a,b,c,d) +: acc._1, acc._2), out, n) case Array(time,ext) => go(in,(acc._1, Array(time,ext) +: acc._2), out, n) case Array(cut) if n == "9000" => go(in, (Nil,Nil), writeBack(rev(acc), n , out), n+1) case _ => go(in, acc, out, n) } } else out } val zero = (Nil,Nil) val outFile = new File("path/of/answers.txt") if (!outFile.exists()) outFile.createNewFile() val bw = new BufferedWriter(new FileWriter(outFile,true)) bw.write( go(input,zero,"",0) ) bw.close } val file = "path/to/inputFile.txt" val theIn = io.Source.fromFile(file) try getData(theIn.getLines) finally theIn.close

在此阶段，req或parse的实现无关紧要。

我没有直接向网站提交我的代码以便它可以处理所有I / O的原因是因为我使用的是Scala并且该网站不接受该语言，因此我使用的是一个名为udebug，人们可以下载一些测试用例并比较输出。

我该怎么办？

无法调用函数 - Scala

0 个答案: