Question

Here are two ways to dynamically allocate a multidimensional array that I know:

int (*numbers)[4] = new int[3][4]

and

int **numbers = new int*[3]; 

Do these two represent the same thing in memory?. What and how do they represent, actually?
(a memory diagram would really help!)

Answer 1

No, the first will create 12 ints (3*4), in memory they will be sequentially laid out. The second creates 3 pointers to integers

Ie the first will be laid out like

[1,2,3,4][5,6,7,8][9,10,11,12]

so you have 3 4 element arrays of integers, wheras the second example is going to look more like

[0x12345678,0x12345678,0x12345678]

ie, 3 uninitialized pointers to integers