cppArrOperator[]

#include <iostream>
#include <cassert>

class DynArray
{
    int* arr;
    int size;
public:
    DynArray(int sizeP)
        : arr{ new int[sizeP] {} }, size{ sizeP }
    {
        std::cout << "DynArr constructed for " << size
            << " elements, for " << this << '\n';
    }
    DynArray() : DynArray(5) {}
    DynArray(DynArray& object) = delete;
    DynArray& operator=(DynArray& object) = delete;
    DynArray(DynArray&& object)
        : arr{ object.arr }, size{ object.size }
    {
        object.arr = nullptr;
        object.size = 0;
        std::cout << "DynArr move constructed for "
            << size << " elements, for " << this
            << '\n';
    }
    DynArray& operator=(DynArray&& object)
    {
        if (!(this == &object))
        {
            delete arr;

            arr = object.arr;
            size = object.size;

            object.arr = nullptr;
            object.size = 0;

        }
        std::cout << "DynArr move assigned for "
            << size << " elements, for " << this
            << '\n';

        return *this;
    }
    // константная перегрузка, возвращающая элемент по значению
    int operator[](int idx)const
    {
        assert(idx >= 0 and idx < size and "Index is out of range!");
        return arr[idx];
    }
    // не константная перегрузка, возвращающая элемент по ссылке
    int& operator[](int idx)
    {
        assert(idx >= 0 and idx < size and "Index is out of range!");
        return arr[idx];
    }
    void print()const;
    void randomize();
    ~DynArray()
    {
        std::cout << "Try to free memory from DynArray for "
            << arr << " pointer\n";
        delete[] arr;
        std::cout << "DynArr destructed for " << size
            << " elements, for " << this << '\n';
    }
};
void DynArray::print()const
{
    for (int i{ 0 }; i < size; ++i)
    {
        std::cout << arr[i] << ' ';
    }
    std::cout << '\n';
}
void DynArray::randomize()
{
    for (int i{ 0 }; i < size; ++i)
    {
        arr[i] = rand() % 10;
    }
}

DynArray arrayFactory(int arrSize)
{
    DynArray arr{ arrSize };
    arr.randomize();
    return arr;
}

int main()
{
    const int arrSize{ 10 };
    DynArray ar1{ arrayFactory(arrSize) };
    std::cout << "ar1 elements : ";
    ar1.print();

    std::cout << "\nChange every ar1 element to its square:\n";
    for (int i{ 0 }; i < arrSize; ++i)
    {
        ar1[i] *= ar1[i];
        std::cout << "ar1[" << i << "] = " << ar1[i] << '\n';
    }

    const DynArray ar2{ arrayFactory(arrSize) };
    std::cout << "ar2 elements :\n";
    for (int i{ 0 }; i < arrSize; ++i)
    {
        std::cout << "ar2[" << i << "] = " << ar2[i] << '\n';
    }

    return 0;
}