LeetCode-Reverse Words in a String

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

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

click to show clarification.

Clarification:

• What constitutes a word?
  A sequence of non-space characters constitutes a word.
• Could the input string contain leading or trailing spaces?
  Yes. However, your reversed string should not contain leading or trailing spaces.
• How about multiple spaces between two words?
  Reduce them to a single space in the reversed string.

class Solution {
public:
    void reverseWords(string &s) {
        stringstream ss;
        ss<<s;
        string term;
        string ret="";
        if(!ss.eof())
        {
            ss>>term;
            ret=term;
        }
		term="";
        while(!ss.eof()){
			term="";
            ss>>term;
			if(term=="")continue;
            ret=term+" "+ret;
        }
        s=ret;
    }
};