Define partial struct with IDA

Question

I want to define struct in Ida , but I know only partial of this struct

I only know that in arr[12] that int student_id , and I don't know the rest of struct. Ida recognize that struct as char * .

How can I define that struct?

Answer 1

Something like:

struct partially_known {
  char gap0[12];
  int student_id;
  char gap10[32];
};