While Loop

#include <iostream>
using namespace std;

int main()
{
    int a, n, i = 0;

    cout << "Introdu n: ";
    cin >> n;

    while(i < n)
    {
        cout << "Introdu a: ";
            cin >> a;

            if (a % 2 == 0)
            {
                cout << "OK" << endl;
            }
            else
            {
                cout << "nu e par." << endl;
            }

            i++;
    }

    return 0;
}