cppDynArrCreateFillPrintDelete

#include <iostream>

int* createArr(int size)
{
    return new int[size];
}

void deleteArr(int* ptr)
{
    delete[] ptr;
}

void printArr(const int* begin, const int* const end)
{
    while (begin != end)
    {
        std::cout << *begin++ << ' ';
    }
    std::cout << '\n';
}

void fillArr(int* begin, const int* const end, int start, int stop)
{
    while (begin != end)
    {
        *begin++ = (rand() % (stop - start) + start);
    }
}


void fillArr(int* begin, const int* const end, int val)
{
    while (begin != end)
    {
        *begin++ = val;
    }
}

int main()
{
    int arr1Size{ 15 };
    auto arr1{ createArr(arr1Size) };
    fillArr(arr1, arr1 + arr1Size, 0);
    fillArr(arr1 + (arr1Size / 4), arr1 + arr1Size - (arr1Size / 4), 0, 10);
    printArr(arr1, arr1 + arr1Size);

    int arr2Size{ 20 };
    auto arr2{ createArr(arr2Size) };
    fillArr(arr2, arr2 + arr2Size, 0);
    fillArr(arr2+(arr2Size / 2), arr2 + arr2Size, 20, 30);
    printArr(arr2, arr2 + arr2Size);

    deleteArr(arr2);
    deleteArr(arr1);
}