#include <iostream>
#include <cstdlib>

using namespace std;

int main (void)
{
    float pro_of_neg = 1.0, val;
    int neg_qty = 0, zero_qty = 0;
    cout << "enter a value or ctrl+z to end: ";
    cin >> val;

    while (!cin.eof())
    {
        if (val == 0.0)
            zero_qty++;
        if (val < 0.0)
        {
            neg_qty++;
            pro_of_neg *= val;
        }

        cout << "enter a value or ctrl+z to end: ";
        cin >> val;
    }

    if (neg_qty > 1)
        cout << "\nproduct of negative elements: " << pro_of_neg << endl;
    else
        cout << "\nare no negative elements or too few values!" << endl;

    if (zero_qty > 0)
        cout << "\nquantity of zero elements: " << zero_qty << endl;
    else
        cout << "\nare no zero elements!" << endl;

    system("pause");
    return 0;
}