leetcode-----7. 整数反转

• 链接：https://leetcode-cn.com/problems/reverse-integer/

代码

class Solution {
    public int reverse(int x) {
        int ans = 0;
        while (x != 0) {
            int tmp = x % 10 + ans * 10;
            if ((tmp - x % 10) / 10 != ans) return 0;
            ans = tmp;
            x /= 10;
        }
        return ans; 
    }
}