Is the following, at file scope, a type declaration or an unnamed variable?
struct student_s {
char* name;
int age;
double height;
struct student_s* next;
};
If it is a type definition, then what is the difference with:
typedef struct student_s {
char* name;
int age;
double height;
struct student_s* next;
};
?
(Background: see my answer at Changing a variable from global to local - C, where I believe the first introduces an unnamed variable that is then optimized away by the compiler.)
Note: the question has been flagged as a possible duplicate of In what scope is a struct member identifier put? but I believe I am not asking a question about the scope of the members but about what the declarations actually create. However. answers to Difference between 'struct' and 'typedef struct' in C++? do explain my question.