Kontrolno_BP2

// Kontrolno.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"

auto input_array(int *array, size_t) -> decltype(array);
void print_array(int *, size_t);
void remap_arrays(int *array, int *, int *, size_t, size_t &, size_t &);

int main()
{
    size_t choice, array_size, evens_t, odds_t;
    int *array = new int[20], *evens_array = new int[20], *odds_array = new int[20];

    do {
        system("cls");

        cout << "Menu:\n";
        cout << "1. Input array\n";
        cout << "2. Output array\n";
        cout << "3. Remap array into even and odd arrays\n";
        cout << "0. Exit\n\n";
        cout << "Enter your choice: ";
        cin >> choice;

        switch (choice) {
            case 1:
                system("cls");
                cout << "Enter array size: ";
                cin >> array_size;

                if (!cin || array_size < 0 || array_size > 20) {
                    cout << "Invalid input";
                    break;
                }

                array = new int[array_size];

                input_array(array, array_size);

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

            case 2:
                system("cls");
                print_array(array, array_size);

                cout << "\n\nPress any key to get back to the menu\n\n";
                _getch();
                break;
            case 3:
                system("cls");
                remap_arrays(array, evens_array, odds_array, array_size, evens_t, odds_t);
                cout << "Arrays remapped!\n\n";
                cout << "Array #1: \n";
                print_array(evens_array, evens_t);

                cout << "\nArray #2: \n";
                print_array(odds_array, odds_t);

                cout << "\n\nPress any key to get back to the menu\n\n";
                _getch();
                break;
        }
    } while (choice != 0);

    delete[] array;

    return 0;
}

auto input_array(int *array, size_t array_size) -> decltype(array) {

    random_device rd;
    mt19937 gen(rd());
    uniform_int_distribution<int> dist(10, 99);

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

    return array;
}

void print_array(int *array, size_t array_size) {
    for (size_t i = 0; i < array_size; i++)
        cout << "Index #" << i << " | Value: " << array[i] << " | Address: " << &array[i] << endl;
}

void remap_arrays(int *array, int *rearray1, int *rearray2, size_t array_size ,size_t &evens_t, size_t &odds_t) {

    evens_t = 0, odds_t = 0;

    for (size_t i = 0; i < array_size; i++) {
        if (array[i] % 2 == 0) {
            rearray1[evens_t] = array[i];
            evens_t++;
        }
        else {
            rearray2[odds_t] = array[i];
            odds_t++;
        }
    }
}