#include <iostream>
#include <cstdlib>
#include <fstream>

using std::cout;
using std::cin;
using std::endl;
using std::string;
using std::cerr;
using std::rand;
using std::ifstream;

const int amountOfNumbers = 10;
int ARRAY[amountOfNumbers] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
const string INT_REQ = "Main: Integer required!";
const string ERROR_FILE_NOT_OPEN = "Main: Cannot open the file.";

void printArray(int *arr, int n)
{
    for (int elem = 0; elem < n; elem++)
    {
        cout << arr[elem] << ' ';
    }

}


int amountDividedWithoutRemainder(int *arr, int digit)
{
    int count = 0;
    for (int elem : arr)
    {
        if (elem % digit == 0)
        {
            ++ count;
        }

    }
    return count;
}

int main()
{
    try
    {
        cout << "Enter a digit to divide to: " << endl;
        int digit = 0;
        cin >> digit;
        if (!cin)
        {
            throw INT_REQ;
        }

        cout << "Static array: ";
        printArray(ARRAY, amountOfNumbers);
        cout << endl;

        cout << "The number of dividing by " <<
        digit << " in static array is equal to: " << amountDividedWithoutRemainder(ARRAY, digit) << endl;
        cout << endl;

        cout << "Enter an amount of numbers in dinamic array: " << endl;
        int n = 0;
        cin >> n;
        if (!cin)
        {
            throw INT_REQ;
        }
        int *DinamicArray = new int[n];
        for (int i = 0; i < n; i++)
        {
            DinamicArray[i] = rand();
        }
        cout << "Dinamic array: ";
        printArray(DinamicArray, n);
        cout << endl;

        cout << "The number of dividing by " <<
        digit << " in dinamic array is equal to: " << amountDividedWithoutRemainder(DinamicArray, digit) << endl;
        cout << endl;
        delete [] DinamicArray;
        ifstream file;
        file.open("input.txt");
        if (!file.is_open())
        {
            throw ERROR_FILE_NOT_OPEN;
        }
        else
        {
            delete [] DinamicArray;
            int amountOfArraysInFile = 0;
            file >> amountOfArraysInFile;
            if (!file)
            {
                throw INT_REQ;
            }

            for (int j = 0; j < amountOfArraysInFile; j++)
            {
                int amountOfNumbersInArrayInFile = 0;
                file >> amountOfNumbersInArrayInFile;
                if (!file)
                {
                    throw INT_REQ;
                }
                DinamicArray = new int[amountOfNumbersInArrayInFile];

                for (int k = 0; k < amountOfNumbersInArrayInFile; k++)
                {
                    file >> DinamicArray[k];
                    if (!file)
                    {
                        throw INT_REQ;
                    }
                }
                cout << "Array from file: ";
                printArray(DinamicArray, amountOfNumbersInArrayInFile);
                cout << endl;
                cout << "The number of dividing by " <<
                digit << " in dinamic array is equal to: " <<
                amountDividedWithoutRemainder(DinamicArray, digit) << endl;
                cout << endl;
                delete [] DinamicArray;

            }
            file.close();
            return 0;
        }
    }
    catch(const string &err)
    {
        cerr << endl << err << endl;
        return -1;
    }
}