c - What is the advantage of specifying two types when creating a typedef'd struct? -

c - What is the advantage of specifying two types when creating a typedef'd struct? -

example 1:

struct t{ int a; };

creates type struct t

example 2:

typedef struct { int a; } t;

creates type t

example 3:

typedef struct t{ int a; } t;

creates both types struct t , t

i tend see illustration 3 lot, , i'm not sure why take on illustration 1 or 2.

are there advantages gain doing way? are there reasons people compatibility? is advantageous kind of scoping reason?

i avoid doing example 3 way, because less maintenance on type, , restricts multiple ways of declaring same thing. however, reconsider it, if there benefits "double naming" technique.

i tend see illustration 3 lot, , i'm not sure why take on illustration 1 or 2.

are there advantages gain doing way?

i hold truth self-evident, namely cumbersome code cumbersome. prefer write

t object;

instead of

struct t object;

however, hard-core c coder might think hey, t struct, improve phone call that , also, mitigates chance confusion you'd when doing

struct {int a; } t; typedef int t; are there reasons people compatibility?

yes. way, structs in c can used used in c++.

is advantageous kind of scoping reason?

no, not i'd aware of.

c struct coding-style typedef c11