Easy way to dynamic allocation? 2D

Question

what is the easiest way to dynamically allocate 2 dimensions array?

Answer 1

https://code.sololearn.com/ca4yjd1IbjYv/#cpp

Here is an example I wrote. I suggest using a 2d vector or smart pointers instead if you can and you want it to be easier.

Answer 2

And how to do it in c language?