Reverse digits of an integer.
Example1: x = 123, return 321
Example2: x = -123, return -321
overflow!
public class Solution { public int reverse(int x) { int y=0; while(x!=0) { //if(y*10/10!=y) return 0; if (y > Integer.MAX_VALUE/10) return 0; if (y < Integer.MIN_VALUE/10) return 0; y=y*10+x%10; x/=10; } return y; } }
原文：http://www.cnblogs.com/hygeia/p/4970895.html