Cannot pass my matrix of structs to a function after using malloc function

Question

I need to create a matrix containing structs. My struct:

typedef struct {
    int a;
    int b;
    int c;
} myStruct;

My method to create matrix

Answer 1

You access the 2D array by the incorrect pointer type. The first element of myStruct matrix[5][5] is an array myStruct[5]. Thus you must cast the result of calloc() to a pointer to SO_WIDTH-element-long array.

myStruct (*matrix)[SO_WIDTH] = calloc (SO_HEIGHT * SO_WIDTH, sizeof(myStruct));

Since C99 there is even no need for SO_WIDTH, SO_HEIGHT to be constants.

EDIT

It looks that the question got re-edited. The update answer is:

Use VLA from C99.

void myfunction(int rows, int cols, myStruct matrix[rows][cols]) {
  ...
}