题解 | #单词倒排#

import Foundation

while let line = readLine() {

     var string = ""
     
    for ch in line {
        if ch.isLetter {
            string.append(ch)
        } else {
          if string.count > 0 && string.last != " " {
            string.append(" ")
          }
        }
    
    }
    
    //! 可以取巧使用系统函数  不然就需要自己实现。或者参考 HJ13 句子逆序
    let array =  string.components(separatedBy: " ")
     
    let resString = array.reversed().joined(separator: " ")





    // let parts = line.split(separator: " ")
    print(resString)
}

HJ13 句子逆序