[面试题]翻转字符串中的单词

 1 /**//// <summary>
 2        /// 翻转字符串中的单词
 3        /// ex.   
 4        ///    I am chinese.   -> I ma esenihc.
 5        /// </summary>
 6        /// <param name="strInput"></param>
 7        /// <returns></returns>
 8        static string ReverseWordInString(string strInput)
 9        {
10            string strMeta = ". ";  //不用反的 标点符号
11            StringBuilder strReturn = new StringBuilder();
12            Stack<char> stack = new Stack<char>();
13            foreach (char c in strInput)
14            {
15                if (strMeta.IndexOf(c) != -1)
16                {
17                    while (stack.Count > 0)
18                    {
19                        strReturn.Append((char)stack.Pop());
20                    }
21                    strReturn.Append(c);
22                }
23                else
24                    stack.Push(c);
25            }
26
27            return strReturn.ToString();
28        }