Palindrome or not? [String Version]

// Runtime: 142 ms
#include <iostream>
#include <string>

using namespace std;

class Solution {
public:
    bool isPalindrome(int x) {
        string number = to_string(x);
        int size = number.size();
        bool checker = true;

        for (int j = 0; (j < size / 2) && checker; j++) {
            if (number[j] != number[(size - 1) - j])
                checker = false;
        }
        return checker;
    }
};

int main(void)
{
    Solution s;
    int num = 112; // change the number from here..!
    if (s.isPalindrome(num))
    {
        cout << "\nPalindrome..!\n\n";
    }
    else
    {
        cout << "\nNot Palindrome..!\n\n";
    }
    return 0;
}