leetcode557

    public class Solution

    {

        public string ReverseWords(string s)

        {

            var list = s.Split(' ').AsEnumerable().ToList();//用空格将单词分隔开

            for (int i = ; i < list.Count(); i++)//循环每一个单词

            {

                var str = list[i];

                var chars = str.Reverse();//将这个单词反转

                StringBuilder sb = new StringBuilder();

                foreach (var c in chars)

                {

                    sb.Append(c);

                }

                list[i] = sb.ToString();//存储反转后的单词

            }

            StringBuilder sb2 = new StringBuilder();

            foreach (var str in list)//拼接单词

            {

                sb2.Append(str);

                sb2.Append(" ");

            }

            var result = sb2.ToString().Substring(, sb2.Length - );//消去最后的一个空格

            //Console.WriteLine(result);

            return result;

        }

    }

https://leetcode.com/problems/reverse-words-in-a-string-iii/#/description