Multi-dimensional array and pointers in C++?

Question

int *x = new int[5]();

With the above mentality, how should the code be written for a 2-dimensional array - int[][]?

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Answer 1

There is no new[][] operator in C++. You will first have to allocate an array of pointers to int:

int **x = new int*[5];

Then iterate over that array. For each element, allocate an array of ints:

for (std::size_t i = 0; i < 5; ++i)
    x[i] = new int[5];

Of course, this means you will have to do the inverse when deallocating: delete[] each element, then delete[] the larger array as a whole.