cppDynMemBasics

#include <iostream>

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 val)
{
    while (begin != end)
    {
        *begin++ = val;
    }
}

int globalArr[100];

int main()
{
    int num{ 442 };
    int* ptr{ nullptr };
    double* ptrD{ new double{36.6} };

    std::cout << "Temperature is: " << *ptrD << '\n';

    delete ptrD;

    ptr = new int{ 42 };

    std::cout << *ptr << '\n';
    *ptr += 3;
    std::cout << *ptr << '\n';
    *ptr = 33;
    std::cout << *ptr << '\n';

    delete ptr;

    int arrSize;
    std::cout << "Enter array size: ";
    std::cin >> arrSize;

    ptr = new int[arrSize] {};
    printArr(ptr, ptr + arrSize);

    delete[] ptr;
    return 0;
}