码迷,mamicode.com
首页 > 其他好文 > 详细

7. Reverse Integer

时间:2019-10-13 19:00:06      阅读:77      评论:0      收藏:0      [点我收藏+]

标签:sed   error   sum   col   res   which   sig   rpo   function   

Given a 32-bit signed integer, reverse digits of an integer.

Example 1:

Input: 123
Output: 321

Example 2:

Input: -123
Output: -321

Example 3:

Input: 120
Output: 21

Note:
Assume we are dealing with an environment which could only store integers within the 32-bit signed integer range: [−231,  231 − 1]. For the purpose of this problem, assume that your function returns 0 when the reversed integer overflows.

 

 

 1 class Solution {
 2 public:
 3     int reverse(int x) {
 4         int64_t res=0; //如果用int会溢出, runtime error
 5         while(x!=0)
 6         {
 7             int tmp=res*10+x%10;
 8             if((tmp-x%10)/10!=res)
 9                 return 0;
10             x/=10;
11             res=tmp;
12         }
13         return res;
14     }
15 };

 

7. Reverse Integer

标签:sed   error   sum   col   res   which   sig   rpo   function   

原文地址:https://www.cnblogs.com/lychnis/p/11667090.html

(0)
(0)
   
举报
评论 一句话评论(0
登录后才能评论!
© 2014 mamicode.com 版权所有  联系我们:gaon5@hotmail.com
迷上了代码!