Example for multi-dimensional (4-above) arrays in C++

Question

I know that we can have arrays with unlimited dimensions but I wonder how it will look like. For example how should we initialize an array like arr[3][3][3][3]. And since the 4th dimension is not comprehensible for human beings, is it useful at all?

Answer 1

Well thank you for your anwser. But my problem is with initialization, not declaration