arr2dDynLecture

#include <iostream>


void printArr2d(int arr2d[][3], int ySize, int xSize)
{
    for (int y{ 0 }; y < ySize; ++y)
    {
        for (int x{ 0 }; x < xSize; ++x)
        {
            std::cout << arr2d[y][x] << '\t';
        }
        std::cout << '\n';
    }
}

void printArr2dDyn(int** arr2d, int ySize, int xSize)
{
    for (int y{ 0 }; y < ySize; ++y)
    {
        for (int x{ 0 }; x < xSize; ++x)
        {
            std::cout << arr2d[y][x] << '\t';
        }
        std::cout << '\n';
    }
}

int main()
{
    const int ySize{ 2 };
    const int xSize{ 3 };
    int arr2d[ySize][xSize]{ {1,2,3},{4,5,6} };

    int** arr2dDyn{ new int* [ySize] {nullptr,nullptr} };
    //std::cout << (arr2dDyn[0] == nullptr) << '\n';
    //std::cout << (arr2dDyn[1] == nullptr) << '\n';
    //arr2dDyn[0] = new int[xSize] {1,2,3};
    //arr2dDyn[1] = new int[xSize] {4,5,6};

    //int* bigArr{ new int[ySize * xSize]{1,2,3,4,5,6} };
    //for (int y{ 0 }; y < ySize; ++y)
    //{
    //  arr2dDyn[y] = bigArr + y * xSize;
    //}
    for (int y{ 0 }; y < ySize; ++y)
    {
        arr2dDyn[y] = new int[xSize];
    }
    printArr2dDyn(arr2dDyn, ySize, xSize);
    //delete[] arr2dDyn[0];
    //delete[] arr2dDyn[1];

    //delete[] bigArr;
    for (int y{ 0 }; y < ySize; ++y)
    {
        delete[] arr2dDyn[y];
    }

    delete[] arr2dDyn;

    ////int arr[xSize]{};
    //int* arrPtr{ new int[xSize] {1,2,3} };
    //
    //arrPtr[0] = 1;
    //arrPtr[1] = 2;
    //arrPtr[2] = 3;

    //*(arrPtr + 0) = 1;
    //*(arrPtr + 1) = 2;
    //*(arrPtr + 1) = 3;

    //delete[] arrPtr;
    //printArr2d(arr2d, ySize, xSize);

}