DidiProgram

#include <iostream>

using namespace std;

double halfAvg(int arr[], int n);
void printArray(int arr[], int n);

int main()
{
    int len;
    do
    {
        cout << "Enter arrays length: ";
        cin >> len;
    }
    while (len < 1 || len > 200 || (len % 2) != 0);

    int mas1[len], mas2[len], mas3[len], mas4[len];

    for (int i = 0; i < len; i++)
    {
        cout << "mas1[" << i << "]: ";
        cin >> mas1[i];
    }

    for (int i = 0; i < len; i++)
    {
        cout << "mas2[" << i << "]: ";
        cin >> mas2[i];
    }

    for (int i = 0; i < len; i++)
    {
        cout << "mas3[" << i << "]: ";
        cin >> mas3[i];
    }

    for (int i = 0; i < len; i++)
    {
        cout << "mas4[" << i << "]: ";
        cin >> mas4[i];
    }

    cout << "Half average mas1: " << halfAvg(mas1, len) << endl;
    cout << "Half average mas2: " << halfAvg(mas2, len) << endl;
    cout << "Half average mas3: " << halfAvg(mas3, len) << endl;
    cout << "Half average mas4: " << halfAvg(mas4, len) << endl;

    int m1[len], m2[len];

    for (int i = 0; i < len; i++)
    {
        m1[i] = mas1[i] + mas2[i];
        m2[i] = mas3[i] + mas4[i];
    }

    cout << "m1: ";
    printArray(m1, len);

    cout << "m2: ";
    printArray(m2, len);

    return 0;
}

double halfAvg(int arr[], int n)
{
    double avg = 0;
    for (int i = 0; i < n / 2; i++)
    {
        avg += arr[i];
    }
    avg /= (n / 2);
    return avg;
}

void printArray(int arr[], int n)
{
    for (int i = 0; i < n; i++)
    {
        cout << arr[i] << " ";
    }
    cout << endl;
}