Reverse Words in a String

class Solution {
public:
    void reverseWords(string &s) {
        int nLen=s.size();
        if(nLen<=0)
            return;
        string temp,result;
        int index=0;
        while(s[index]==‘ ‘)
            index++;
        for(int i=index;i<nLen;)
        {
            if(s[i]!=‘ ‘)
            {
                temp+=s[i];
                i++;
            }
            else
            {
                while(s[i]==‘ ‘)
                    i++;
                if(i==nLen)
                    break;
                result=" "+temp+result;
                temp="";
            }
        }
        s=temp+result;
    }
};