LeetCode OJ-- Reverse Integer

https://oj.leetcode.com/problems/reverse-integer/

一个整数，给反过来，比如123输出321.注意12300的情况，应该输出321，还有-123，是-321.

class Solution {
public:
    int reverse(int x) {
        if(x == )
            return ;
        bool isNegative = false;
        if(x<)
        {
            isNegative = true;
            x = -x;
        }
        vector<int> num;
        while(x!=)
        {
            num.push_back( x%);
            x = x/;
        }
        int ans = ;
        for(int i = ;i<num.size();i++)
        {
            ans = ans * ;
            ans += num[i];

        }
        if(isNegative)
            ans = ans*(-);
        return ans;
    }
};