Defining an array of structures in C?

Question

main.h

#define  DATA  struct   data
DATA
{
  int id;
  char data;
}

main.c

DATA *listOfData[100];

So at this

Answer 1

You haven't shown any memory allocation for the DATA *. Either declare your array as an array of struct data, like:

DATA listOfData[100];

or allocate memory dynamically and assign the pointers in your array.