旋轉整數

Reverse digits of an integer.

Example1: x = 123, return 321

Example2: x = -123, return -321

Java代碼如下：

public class Solution {
    public int reverse(int x) {
       int rval = 0;
       int flag = 1;
       if(x < 0) {
           flag = -1;
           x = -x;
       }
       while(x > 0){
           rval =rval * 10 + x%10;
           x /= 10;
       }
       return flag * rval;
    }
}