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题目网址：https://leetcode.com/problems/reverse-string/
Write a function that takes a string as input and returns the string reversed.
Example:
Given s = "hello", return "olleh".
解法：
C++：
class Solution {
public:
string reverseString(string s) {
int len = s.length();
char result = ‘‘;
int j = 0;
for(int i = len-1;i>=0;i--) {
result[j] = s[i];
j++;
}
return result;
}
};
Python：
方法一：
class Solution(object):
def reverseString(self, s):
"""
:type s: str
:rtype: str
"""
return s[::-1]
方法二：
class Solution(object):
def reverseString(self, s):
"""
:type s: str
:rtype: str
"""
t = list(s)
l = len(t)
for i,j in zip(range(l-1, 0, -1), range(l//2)):
t[i], t[j] = t[j], t[i]
return "".join(t)
Javascript：
/**
* @param {string} s
* @return {string}
*/
var reverseString = function(s) {
return s.split(‘‘).reverse().join(‘‘);
};
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原文地址：http://www.cnblogs.com/breezeljm/p/5734917.html
