Confusion with typedef and pointers in C [duplicate]

Answer 1

This would be a pointer that points to a struct body.

The way you've declared it, newHeadptr could point to a struct body. Remember, though, that you haven't allocated a struct body for it to point to. Initially, newHeadptr will just have some garbage value. To rectify that, you could to this:

headerptr newHeaderptr = malloc(sizeof(*newHeaderptr));

or:

struct body newBody;
headerptr newHeaderptr = &newBody;