Hi, im confused about the use of the keyword typedef, the question is, when do i have to use it?
and whats the difference between declaring structure variables in this way:
and this way:Code:struct book { ........ ........ }; struct book b1, b2... ecc; // or struct book { ...... ....... } b1, b2....ecc;
Thanks!Code:struct book { ...... ...... }; typedef struct book b1, b2..... ecc;
Without the typedef you need to put struct before any declaration.
The same goes for enums by the way.Code:struct book b1; /* Without the typedef */ book b2; /* With the typedef */
The latter doesn't declare any variables, "b1" has become a type (identical to "struct book" -- that is, it is an alias). The former declares instances of "struct book"s. They're not the same thing in this circumstance.
ok thanks everybody
