Leet code---Reverse Integer

#include<iostream>
#include <string>
using namespace std;
class Solution {
public:
int reverse(int x) {
bool sign = x > 0 ? false : true;
long long temp = x;
long long result = 0;
temp = temp > 0 ? temp : -temp;
while(temp) {
result = result*10+temp % 10;
temp = temp / 10;
}
if(result > 2147483647 || (sign && result > 2147483648))  {
return 0;
}
else {
if(sign) {
return -(int)result;
}
else {
return (int) result;
}
}
}
};
int main(){
Solution so;
cout << so.reverse(153423646923) <<endl;
system("pause");
}