[Leetcode] Palindrome Number

Palindrome Number Jan 4 '12 6687 / 16659

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

 

重来没有这么爽过！

 

class Solution {
public:
    int reverse(int x) {
        int r = 0;
        while (x > 0) {
            r = 10 * r + x % 10;
            x /= 10;
        }
        return r;
    }
    bool isPalindrome(int x) {
        if (x < 0) return false;
        if (reverse(x) == x) return true;
else return false;
    }
};