Help me with allocating arrays with dynamic length(variable length)

Question

How to allocate an array with a dynamic size? This might seem like a basic question, but how do we allocate a nxn array with n being the input? I tried something, but it's probably the worst way to do this
https://code.sololearn.com/cHWMUP0BEIeA/?ref=app

Answer 1

You can dynamically allocate a 2D array like;

int **arr = new int*[size];
for (int k{0}; k < size; ++k) {
arr[k] = new int[size];
}

Answer 2

ChaoticDawg ooh yes I didn't think about this way, thank you