文章作者：Tyan
博客：noahsnail.com  |  CSDN  |  简书

1. Description

Reverse String

2. Solution

class Solution {
public:
    string reverseString(string s) {
        int i = 0;
        int j = s.length() - 1;
        while(i < j) {
            swap(s[i++], s[j--]);
        }
        return s;
    }

private:
    void swap(char& a, char& b) {
        char temp = a;
        a = b;
        b = temp;
    }
};

Reference

1. https://leetcode.com/problems/reverse-string/description/