arrSumFLNegEvenIdxProd

#include <iostream>
#include <ctime>
int main()
{
    const int arrSize{10};
    int arr[arrSize]{ };

    int idxMin{0};
    int idxMax{0};
    int negSum{0};
    int negFLSum{0};
    int evenProd{1};
    int minMaxProd{0};
    int firstNegIdx{-1};
    int lastNegIdx{-1};

    srand(time(0));

    std::cout << "Index\tValue\n";
    for (int idx{0}; idx < arrSize; ++idx)
    {
        std::cout << idx << "\t" << (arr[idx] = -5 + rand() % 11)<< '\n';
    }

    for (int idx{0}; idx < arrSize; ++idx)
    {
        if (arr[idx] < 0) { negSum += arr[idx]; lastNegIdx = idx; };
        if (arr[idx] < 0 and firstNegIdx < 0) { firstNegIdx = idx;}

        if (arr[idx] < arr[idxMin]) { idxMin = idx; }
        if (arr[idx] > arr[idxMax]) { idxMax = idx; }

        if (idx % 2 == 0) { evenProd *= arr[idx]; }
    }

    if (idxMin > idxMax ) { int tmp{idxMax}; idxMax=idxMin; idxMin=tmp;}
    if ( idxMax - idxMin != 1)
    {
        minMaxProd = 1;
        for (int idx{idxMin + 1}; idx < idxMax; ++idx)
        {
            minMaxProd *= arr[idx];
        }
    }

    for (int idx{firstNegIdx + 1}; idx < lastNegIdx; ++idx)
    {
        negFLSum += arr[idx];
    }

    std::cout << "Sum of negative elements: " << negSum << '\n';
    std::cout << "Product of elements between min and max elem. : " << minMaxProd << '\n';
    std::cout << "Product of even number elements: " << evenProd << '\n';
    std::cout << "Sum between first = " << arr[firstNegIdx] <<
            " and last = "<< arr[lastNegIdx] << " negative elements: " << negFLSum << '\n';

    return 0;
}