练习（11.18）

object Test11_8_1 {
    def main(args: Array[String]) {

      // 1. 浮点数的字符串与类型转换
      val floatString = "3.14"
      val floatValue = floatString.toFloat
      val backToString = floatValue.toString
      println(backToString)

      // 2. 字符串提取与连接
      val originalString = "Hello，World!Scala is amazing."
      val extractedString = originalString.substring(originalString.indexOf("Scala"))
      val newStringToConnect = "Programming in Scala is fun."
      val combinedString = extractedString + " " + newStringToConnect
      println(combinedString)

      // 3. 提取信息并转换成绩类型
      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")

      // 4. 统计单词出现次数
      val inputString = "the quick brown fox jumps over the lazy dog"
      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: $word, Count: $count")
      }
    }

}