Reverse Integer
Reverse digits of an integer.
Example1: x = 123, return 321
Example2: x = -123, return -321
click to show spoilers.
SOLUTION 1:
注意越界后返回0.先用long来计算，然后，把越界的处理掉。
public class Solution { public int reverse(int x) { long ret = 0; while (x != 0) { ret = ret * 10 + x % 10; x /= 10; } if (ret > Integer.MAX_VALUE || ret < Integer.MIN_VALUE) { return 0; } return (int)ret; } }
GITHUB：
https://github.com/yuzhangcmu/LeetCode_algorithm/blob/master/math/Reverse.java
LeetCode: Reverse Integer 解题报告
原文：http://www.cnblogs.com/yuzhangcmu/p/4162196.html
