How to dynamically allocate a contiguous block of memory for a 2D array

Question

If I allocate a 2D array like this int a[N][N]; it will allocate a contiguous block of memory.

But if I try to do it dynamically like this :

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Answer 1

Excuse my lack of formatting or any mistakes, but this is from a cellphone.

I also encountered strides where I tried to use fwrite() to output using the int** variable as the src address.

One solution was to make use of two malloc() invocations:

#define HEIGHT 16
#define WIDTH 16
.
.
.
//allocate
int** data = malloc(HEIGHT*sizeof(int**));
int* realdata = malloc(HEIGHT*WIDTH*sizeof(int));
//manually index
for(int i = 0;i