LeetCode::Reverse Words in a String

#include<iostream>#include<string>using namespace std;class Solution {public:    void reverseWords(string &s) {        int i, n;string tmp_s;int word_Length = 0;if(s.empty())return ;for(i = s.length()-1; i >= 0;){word_Length = 0;while(s[i] == ' ')i--;n = i;while(s[n] != ' ' && n >= 0){word_Length++;n--;}n += 1;tmp_s += s.substr(n,word_Length);tmp_s += ' ';i -= word_Length;}cout << "tmp_s.length() = " << tmp_s.length() << endl;/*去掉尾空格*/i = tmp_s.length()-1;while(tmp_s[i] == ' ' && i >= 0)i--;cout << "i = " << i << endl;tmp_s.resize(i+1);cout << "tmp_s.length() = " << tmp_s.length() << endl;cout << "tmp_s = " << tmp_s << endl;        <span style="white-space:pre"></span>s = tmp_s;  //cout << tmp_s.append("space") << endl;//s = tmp_s.substr(0,tmp_s.length());    }};int main(){string s;Solution reverseSolution;getline(cin,s);cout << s << endl;cout << "s.length() = " << s.length() << endl;reverseSolution.reverseWords(s);cout << s << endl;cout << "s.length() = " << s.length() << endl;return 0;}