题目描述：
Determine whether an integer is a palindrome. Do this without extra space.
代码：
bool Solution::isPalindrome(int x)
{
int a = x;
int b = 0;
while(a > 0)
{
b = b * 10 + a % 10;
a = a % 10;
}
return b == x;
}
原文：http://blog.csdn.net/yao_wust/article/details/40829847