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LeetCode:Reverse Words in a String

题目链接

Given an input string, reverse the string word by word.

For example,
Given s = "the sky is blue",
return "blue is sky the".


 1 class Solution { 2 public: 3     void reverseWords(string &s)  4     { 5         //从前往后扫描  6         string res, word; 7         for(int i = s.size()-1; i >= 0;) 8         { 9             while(i >= 0 && s[i] ==  )--i;//去掉空格10             if(i < 0)break;11             if(res.size() != 0)res.push_back( );12             word.clear();13             while(i >= 0 && s[i] !=  )word.push_back(s[i--]);//word为找到的一个单词14             for(int j = word.size()-1; j >= 0; --j)15                 res.push_back(word[j]);16         }17         s = res;18     }19 };

 

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LeetCode:Reverse Words in a String