leetcode_344_反转字符串

请编写一个函数，其功能是将输入的字符串反转过来。

示例：

输入：s = "hello"
返回："olleh"

---

class Solution {
public:
    string reverseString(string s) {
        for (int i=0; i<s.length()/2;i++)
        {
            char temp = s[i];
            s[i] = s[s.length()-i-1];
            s[s.length()-i-1] = temp;
            
        }
        return s;
    }
};

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