9. Palindrome Number （考虑负数的情况）

Determine whether an integer is a palindrome. Do this without extra space.

long int reverse(int x) {
    long int ret = ;

    while(x>){
        ret = ret* + x%;
        x /= ;
    }
    return ret;
}

bool isPalindrome(int x) {
    if(x<) return false; //consider case of negative number
    if(x==reverse(x)) return true;
    else return false;
}