K2Zad2

#include <iostream>

using namespace std;

int gcd(int a, int b);

int func(int* arr, int n);

int main()
{
    int n;
    cout << "Enter n: ";
    cin >> n;
    int a[n];
    cout << "Enter " << n << " numbers: ";
    for (int i = 0; i < n; i++)
    {
        cin >> a[i];
    }
    cout << "Result: " << func(a, n) << endl;
    return 0;
}

int gcd(int a, int b) {
    while (b != 0) {
        a %= b;
        swap(a, b);
    }
    return a;
}


int func(int* arr, int n)
{
    int m = 0;
    for (int i = 0; i < n; i++)
    {
        if (arr[i] >= 2)
        {
            arr[m] = arr[i];
            m++;
        }
    }
    n = m;

    if (n == 0)
    {
        return 0;
    }
    int gcdNum = arr[0];
    for (int i = 0; i < n; i++)
    {
        gcdNum = gcd(arr[i], gcdNum);
    }
    return gcdNum;
}