#include "stdafx.h"
#include <iostream>
using namespace std;

class first
{
protected:
    static int size;
    int *array;
public:
    first()
    {
        cout << "Input size: ";
        cin >> size;
        array = new int[size];
        cout << endl;
        cout << "Input array: " << endl;
        for (int i = 0; i < size; i++)
        {
            cin >> array[i];
            cout << " ";
        }
        cout << endl;
        cout << "Constructor!" << endl;
    }
    void sum()
    {
        size;
        int sum = 0;
        for (int i = 0; i < size; i++)
        {
            sum += array[i];
        }
        cout << "Sum = " << sum << endl;
    }
    ~first()
    {
        delete[]array;
        cout << "Destructor!" << endl;
    }
};
int first::size;

class second :public first
{
public:
    void average()
    {
        {
            double average, sum = 0;
            for (int i = 0; i < size; i++)
            {
                sum += array[i];
            }
            average = sum / size;
        }
        cout << "Average = " << average << endl;
    }
};

int main()
{
    second obj;
    obj.sum();
    obj.average();
    return 0;
}