/*************************************************************************

> File Name: solution_plain.cc

> Author: MarkWoo

> Mail:wcgwuxinwei@gmail.com

> Created Time: Tue 03 May 2016 05:44:46 AM PDT

************************************************************************/

#include<iostream>

#include<string>

using namespace std;

class Solution {

public:

void swap(char &pror, char &succ)

{

if (pror != succ)

{

char tmp = pror;

pror = succ;

succ = tmp;

}

}

string reverseString(string s)

{

size_t head = 0;

size_t tail = 0;

if (s.size() != 0)

{

tail = s.size() - 1;

}

for (; head < tail; ++head, --tail)

{

swap(s[head], s[tail]);

}

return s;

}

};

int main(void)

{

string s("hello");

string answer;

Solution solution;

answer = solution.reverseString(s);

std::cout << s << std::endl;

std::cout << answer << std::endl;

return 0;

}