[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) {
long long int ret=0;
while(x){
ret = 10*ret + x%10;
if(ret>INT_MAX||ret<INT_MIN)    //用longlong来判断溢出
return 0;
x = x/10;
}
return ret;
}
};