Как переделать код под ООП?

#include<iostream>
 
using namespace std;
 
int main()
{
    int x, n;
    cout << "Enter x: ";
    cin >> x;
    << "Enter Number of array elements: "; 
    cin >> n;
    cout << "Enter elements of array:" << endl;
    int* arr = new int[n];
    for (int i = 0; i < n; i++) 
        cin >> arr[i];
    if (x == arr[0])
    {
        arr[0] = arr[n - 1];
        arr[n - 1] = x;
        cout << "Array after swapping first and last elements: ";
        for (int i = 0; i < n; i++) 
            cout << arr[i] << " ";
    }
    else cout << "Error";
    delete[] arr;
    return 0;
}