For T

main.cpp

#include <iostream>
#include <limits>
// climits for intmax value

using namespace std;

void print_array(int *a, int size) {
    for (int i = 0; i < size; i++)
        cout << a[i] << ' ';
    cout << endl;
}

int main() {

    int n = -1;

    cout << "Input array length: ";
    cin >> n;
    int MAX = numeric_limits<int>::max();
    int MIN = numeric_limits<int>::min();
    if (n <= 0 || n >= MAX) {
        cerr << "Invalid value. Input value from 1 to " << MAX << endl;
        return 1;
    } else {
        int a[n];
        cout << "Enter array values, please: ";
        for (int i = 0; i < n; i++) {
            cin >> a[i];
        }

        //reading ended;
        int multiple = 1;
        int sum = MIN;
        int current_sum = 0;
        bool sum_action = false;

        for (int i = 0; i < n; i++) {
            if (a[i] % 2 == 0) multiple *= i + 1;

            if (sum_action) {
                if (a[i] == 0) {
                    if (sum == MIN)
                        sum = 0;
                    sum += current_sum;
                    current_sum = 0;
                } else {
                    current_sum += a[i];
                }
            }

            if (!sum_action && a[i] == 0) {
                sum_action = true;
            }

        } //end for

        // reverse array
        for (int i = 0; i < n / 2; i++) {
            int temp = a[i];
            a[i] = a[n - i - 1];
            a[n - i - 1] = temp;
        }

        cout << "Multiple indexes value = " << multiple << endl << "Sum between zeros = ";
        if (sum == MIN)
            cout << "unknown" << endl;
        else
            cout << sum << endl;
        
        cout << "Inversed array: ";
        for (int i = 0; i < n; i++) {
            cout << a[i] << ' ';
        }
        cout << endl;
    }
}