C pointers with Structs and 2D Arrays - c

Question

I am confused on how these C pointers work.
Here is what I am trying to do:
Create a struct that has a row, column, and grid (2d array of predefined size).
typedef struct
{
int row;
int column;
int (*matrix)[GRID_SIZE];
} parameters;
Now I create one
int grid[GRID_SIZE][GRID_SIZE] = {
{6, 5, 3, 1, 2, 8, 7, 9, 4},
{1, 7, 4, 3, 5, 9, 6, 8, 2},
{9, 2, 8, 4, 6, 7, 5, 3, 1},
{2, 8, 6, 5, 1, 4, 3, 7, 9},
{3, 9, 1, 7, 8, 2, 4, 5, 6},
{5, 4, 7, 6, 9, 3, 2, 1, 8},
{8, 6, 5, 2, 3, 1, 9, 4, 7},
{4, 1, 2, 9, 7, 5, 8, 6, 3},
{7, 3, 9, 8, 4, 6, 1, 2, 5}};
parameters *data = (parameters *) malloc(sizeof(parameters));
data->row = 1;
data->column = 2;
data->matrix = grid; // is this right?
int** test = data->matrix; //this is wrong.
My goal is to pass in that struct as data when creating a new thread. I am really clueless on how the pointer system works when creating the 2D array in the struct and then using it later. Any help is appreciated.
Edit... here is my new code.. looks like its working! :)
parameters *data = malloc(sizeof(parameters)); //make sure to free thread after
data->row = 1;
data->column = 2;
data->matrix = grid;
int (*test)[GRID_SIZE] = data->matrix;
printf("first value, %d\n", test[0][0]);

Answer 1

Something like this should work.
Define your struct like this:
typedef struct
{
int row;
int column;
int matrix[GRID_SIZE][GRID_SIZE];
} parameters;
Copy the matrix like this:
memcpy( data->matrix, grid, sizeof(grid) );