7. Reverse Integer

Reverse digits of an integer.

Example1: x = 123, return 321
Example2: x = -123, return -321

 

 1 class Solution {
 2 public:
 3     int reverse(int x) {
 4         int num = x;
 5         int ret = 0;
 6         while (num) {
 7             int rem = num % 10;
 8             num /= 10;
 9             ret = ret * 10 + rem ;
10         }
11         return ret;
12     }
13 };

 

posted @ 2017-04-28 15:10  Kim_0908  阅读(103)  评论(0)    收藏  举报