kod

#include <iostream>
#include <iomanip>
#include <cstdlib>
#include <ctime>

using namespace std;

double get_average (double *arr, const size_t size);
void   init_array  (double *arr, const size_t size);
void   print_array (double *arr, const size_t size);

int main (void)
{
    const size_t arr_size = 15;
    double arr1[arr_size], arr2[arr_size];

    srand((unsigned int)time(NULL));
    init_array(arr1, arr_size);
    init_array(arr2, arr_size);
    print_array(arr1, arr_size);
    print_array(arr2, arr_size);

    cout << "array1 average: " << get_average(arr1, arr_size) << endl;
    cout << "array2 average: " << get_average(arr2, arr_size) << endl;

    print_array(arr1, arr_size);
    print_array(arr2, arr_size);

    system("pause");
    return 0;
}


double get_average (double *arr, const size_t size)
{
    double av = 0.0, sum = 0.0;

    for (size_t i = 0; i < size; i++)
        sum += arr[i];

    av = sum / size;

    for (size_t i = 0; i < size; i++)
    {
        if (arr[i] > av)
        {
            arr[i] = 0.0;
            break;
        }
    }
    return av;
}

void init_array (double *arr, const size_t size)
{
    for (size_t i = 0; i < size; i++)
        arr[i] = 1 + rand() % 100;
}

void print_array (double *arr, const size_t size)
{
    for (size_t i = 0; i < size; i++)
        cout << setw(4) << arr[i];

    cout << endl;
}