#include "stdafx.h"
#include <iostream>

using namespace std;

void readData(double numbers[30], int &size);
void positiveSum(double numbers[30], int size);
void negativeAverageInRange(double numbers[30], int size);
void notZeroMultiplication(double numbers[30], int size);
void smallestPosNumberAndIndex(double numbers[30], int size);
void printElements(double numbers[30], int size);

int main()
{
    double numbers[30];
    int size = 0;

    while (true) {
        cout << "Izberete 1 za vavejdane na razmernost i elementi na masiv." << endl;
        cout << "Izberete 2 za suma na polojitelni chisla." << endl;
        cout << "Izberete 3 za sredno aritmetichno na otricatelni chisla v interval." << endl;
        cout << "Izberete 4 za proizvedenie i broy na nenulevite chislata ot masiva." << endl;
        cout << "Izberete 5 za minimalno polojitelno chislo i negoviq poreden nomer." << endl;
        cout << "Izberete 6 za izvejdane na elementite na masiva." << endl;
        cout << "Vashata opciq: ";

        int option;
        cin >> option;

        switch (option)
        {
        case 1:
            readData(numbers, size);
            break;

        case 2:
            positiveSum(numbers, size);
            break;

        case 3:
            negativeAverageInRange(numbers, size);
            break;

        case 4:
            notZeroMultiplication(numbers, size);
            break;

        case 5:
            smallestPosNumberAndIndex(numbers, size);
            break;
        case 6:
            printElements(numbers, size);
            break;
        }
    }

    return 0;
}

void readData(double numbers[30], int &size)
{
    cout << "Razmernost(n): ";
    cin >> size;

    while (size < 1 || size > 30) {
        cout << "Nevalidna razmernost.";
        cout << "Vavedete razmernost otnovo: ";
        cin >> size;
    }

    double readNumber;

    for (int i = 0; i < size; i++)
    {
        cout << "a[" << i << "]" << " = ";
        cin >> numbers[i];
    }
}

void positiveSum(double numbers[30], int size)
{
    double positiveSum = 0;

    for (int i = 0; i < size; i++)
    {
        if (numbers[i] > 0)
        {
            positiveSum += numbers[i];
        }
    }

    cout << "Suma na polojitelni chisla: " << positiveSum << endl;
}

void negativeAverageInRange(double numbers[30], int size)
{
    double sum = 0;
    double count = 0;
    double min;
    double max;

    cout << "Min: ";
    cin >> min;
    cout << "Max: ";
    cin >> max;

    for (int i = 0; i < size; i++)
    {
        if (numbers[i] < 0 && numbers[i] >= min && numbers[i] <= max)
        {
            sum += numbers[i];
            count++;
        }
    }

    if (count == 0)
    {
        cout << "Masivat ne sudurja otricatelni chisla v zadadeniq interval." << endl;
    }

    else
    {
        cout << "Аverage: " << sum / count << endl;
    }
}

void notZeroMultiplication(double numbers[30], int size)
{
    double multiplication = 1;
    double count = 0;

    for (int i = 0; i < size; i++)
    {
        if (numbers[i] != 0)
        {
            multiplication *= numbers[i];
            count++;
        }
    }

    cout << "Proizvedenie: " << multiplication << endl;
    cout << "Broy: " << count << endl;
}

void smallestPosNumberAndIndex(double numbers[30], int size)
{
    double smallestPosNumber = 99999999;
    int index = 0;

    for (int i = 0; i < size; i++)
    {
        if (numbers[i] > 0 && smallestPosNumber > numbers[i])
        {
            smallestPosNumber = numbers[i];
            index = i;
        }
    }

    if (smallestPosNumber == 99999999) { //ne se e promenilo
        cout << "Masivat ne sudarja polojitelno chislo" << endl;
    }

    else
    {
        cout << "Chislo: " << smallestPosNumber << endl;
        cout << "Poreden nomer: " << index + 1 << endl;
    }
}

void printElements(double numbers[30], int size)
{
    for (int i = 0; i < size; i++)
    {
        cout << "a[" << i << "]" << " = " << numbers[i] << endl;
    }
}