leetcode之371. Sum of Two Integers（C++解法）

題目：
Write a function that takes a string as input and returns the string reversed.

Example:
Given s = “hello”, return “olleh”.
*********************我是分割線*************************
class Solution {
public:
string reverseString(string s) {

    string p;
    int n=s.size();
    for(n=n-1;n>=0;n--)
    {

     p.push_back(s.at(n));
    }
    return p;
}

};