#include <iostream>

using namespace std;

void func(int *& arr, int num);

int main() {

    int * arr = nullptr, n = 5;

    func(arr, n);

    cout << " pec: " << arr;

   for (int i = 0; i < n; i++) {

        arr[i] = i;
        cout << arr[i] << '\n';
    }
    return 0;
}

void func(int *& arr, int num) {
    arr = new int[num];

    cout << "pirms: " << arr;

    return;
}