Kontrolno2_BP2_zad3

#include <iostream>
#include <random>
#include <conio.h>
using namespace std;

auto input_array(int *, size_t, size_t &, size_t &) -> void;
auto output_array(int *, size_t) -> void;
auto multiply_by_7(int *, size_t) -> void;
auto divide_by_8(int *, size_t) -> void;

int main() {

    random_device rd;
    mt19937 gen(rd());
    uniform_int_distribution<> dist(1, 16);

    size_t count(dist(gen)), odd_count = 0, even_count = 0, choice;

    int *array = new int[count], *odd = new int[odd_count], *even = new int[even_count];;


    do {
        system("cls");

        cout << "Menu:\n\n";
        cout << "[1] Input array\n";
        cout << "[2] Create two new arrays\n";
        cout << "[3] Multiply by 7 in the new array\n";
        cout << "[4] Divide by 8 each even element that is divisable by 8\n";
        cout << "[5] Print all arrays\n\n";
        cout << "[0] Exit\n";
        cout << "Your choice: ";
        cin >> choice;

        switch (choice) {
        case 1:
            system("cls");
            input_array(array, count, odd_count, even_count);

            cout << "The array is generated successfully!\nCount of the elements: " << count << "\n\nPress any key to get back to the menu!";
            _getch();
            break;
        case 2:
            system("cls");

            odd = new int[odd_count];
            even = new int[even_count];

            even_count = odd_count = 0;

            for (size_t i = 0; i < count; i++)
                array[i] & 0x1 ? odd[odd_count++] = array[i] : even[even_count++] = array[i];

            cout << "The arrays are created successfully!\n\nPress any key to get back to the menu!";
            _getch();
            break;
        case 3:
            system("cls");
            multiply_by_7(odd, odd_count);

            cout << "Array #1 is multiplied by 7 successfully!\n\nPress any key to get back to the menu!";
            _getch();
            break;
        case 4:
            system("cls");
            divide_by_8(even, even_count);

            cout << "Array #2 is divided by 8 successfully!\n\nPress any key to get back to the menu!";
            _getch();
            break;
        case 5:
            system("cls");

            cout << "Original array: \n\n";
            output_array(array, count);

            cout << "\nNew array #1: (Multiplied by 7)\n\n";
            output_array(odd, odd_count);

            cout << "\nNew array #2: (Divided by 8)\n\n";
            output_array(even, even_count);

            cout << "\n\nPress any key to get back to the menu!";
            _getch();
            break;

        default:
            break;
        }

    } while (choice != 0);

    return 0;
}

auto output_array(int *array, size_t size) -> void {
    if (!size || size == 0)
        cout << "Error: invalid size!\n";
    else
        for (size_t i = 0; i < size; i++)
            if (i == (size - 1))
                cout << "#: " << i << " | Element: " << array[i] << endl;
            else
                cout << "#: " << i << " | Element: " << array[i] << " | ";
}

auto multiply_by_7(int *array, size_t size) -> void {
    if (!size || size == 0)
        cout << "Error: invalid size!\n";
    else
        for (size_t i = 0; i < size; i++)
            array[i] = (array[i] << 3) - array[i];
}

auto divide_by_8(int *array, size_t size) -> void {

    if (!size || size == 0)
        cout << "Error: invalid size!\n";
    else
        for (size_t i = 0; i < size; i++)
            if (array[i] & 0x8)
                array[i] >>= 3;
}

auto input_array(int *array, size_t size, size_t &odd_count, size_t &even_count) -> void {

    random_device rd;
    mt19937 gen(rd());
    uniform_int_distribution<> dist(10, 66);

    for (size_t i = 0; i < size; i++) {
        array[i] = dist(gen);

        array[i] & 0x1 ? odd_count++ : even_count++;
    }
}