Scala字符串练习题

object StringManipulationExamples {
  def main(args: Array[String]): Unit = {
    // 问题1
    val floatString = "3.14"
    val floatValue = floatString.toFloat
    val backToString = floatValue.toString
    println(backToString)

    // 问题2
    val originalString = "Hello, World! Scala is amazing."
    val subString = originalString.substring(14)
    val newString = subString + " Programming in Scala is fun."
    println(newString)

    // 问题3
    val infoString = "John,20,85"
    val parts = infoString.split(",")
    val age = parts(1).toInt
    val score = parts(2).toInt
    println(s"Age: $age, Score: $score")

    // 问题4
    val inputString = "hello world hello scala world scala"
    val words = inputString.split(" ")
    val wordCountMap = scala.collection.mutable.Map[String, Int]()
    for (word <- words) {
      if (wordCountMap.contains(word)) {
        wordCountMap(word) += 1
      } else {
        wordCountMap(word) = 1
      }
    }
    for ((word, count) <- wordCountMap) {
      println(s"$word: $count")
    }
  }
}