LeetCode--Reverse Integer

Reverse digits of an integer.

Example1: x = 123, return 321

Example2: x = -123, return -321

class Solution {public:    int reverse(int x)     {        if(x>2147483647 || x <= -2147483648 || x == 0  )            return 0;        if(x < 0 )            return (-reverse(-x));        vector<int> temp;        while(x > 0)        {            temp.push_back(x%10);            x = x/10;        }        long long res = 0;        for(int i=0; i<temp.size(); i++)            res = res*10+temp[i];        if(res>2147483647)            return 0;        return res;    }};