unos ispis i suma niza rekurzija

#include <iostream>
using namespace std;

void unosREK  (int niz[], int max)
{
    if (max <= 0) cin >> niz[0];
    else
    {
        cin >> niz[max];
        unosREK(niz, max - 1);
    }
}
void ispisREK (int niz[], int max)
{
    if (max <= 0) cout << niz[0];
    else
    {
        cout << niz[max] << "\t";
        ispisREK(niz, max - 1);
    }
    cout << endl;
}
int  sumaREK  (int niz[], int max)
{
    int sum = 0;
    if (max <= 0) sum += niz[0];
    else
    {

        return sum += niz[max] + sumaREK(niz, max - 1);
    }
}

int main()
{
    const int max = 7;
    int niz[max];

    cout << "******** UNOS ELEMENATA ********  "    << endl << endl;
    unosREK(niz, max-1);

    cout << "******** ISPIS ELEMENATA ********  "   << endl << endl;
    ispisREK(niz, max-1);

    cout << "******** SUMA ELEMENATA ********  "    << endl << endl;
    cout << sumaREK(niz, max-1);



    system("pause > null");
    return 0;
}