cStyleMemoryAlloc

include <iostream>

void printArr(int* arr, int size)
{
    for (int i = 0; i < size; i++)
    {
        std::cout << arr[i] << ' ';
    }
    std::cout << '\n';
}

void randomizeArr(int* arr, int size)
{
    for (int i = 0; i < size; i++)
    {
        arr[i] = rand() % 10;
    }
}

int main()
{
    int* ptr = (int*)malloc(sizeof(int) * 10);
    std::cout << "ptr address is: " << ptr << '\n';
    randomizeArr(ptr, 10);
    printArr(ptr, 10);
    ptr = (int*)realloc(ptr, sizeof(int) * 20);

    std::cout << "ptr address is: " << ptr << '\n';
    printArr(ptr, 20);
    randomizeArr(ptr + 10, 10);
    printArr(ptr, 20);
    free(ptr);
}