I'm learning c programming and I was wondering what's the difference between struct and typdef struct
Because from what I saw
struct Structure {
char * name;
int number;
};
acts the same as
typedef struct {
char * name;
int number;
} Structure;
They are not the same.
The first creates a structure named struct Structure, and variables of this type are defined like this:
struct Structure myvar;
The second creates an anonymous structure and gives it the alias Structure. Variables of this type are defined like this:
Structure myvar;
Also, these two structs are not interchangeable because they have different names.
In this declaration
struct Structure {
char * name;
int number;
};
there is declared a type specifier struct Structure. Using it in declarations you have to write the keyword struct like
struct Structure s;
You may introduce a variable name Structure and it will not conflict with the the structure tag name because they are in different name spaces.
In this declaration
typedef struct {
char * name;
int number;
} Structure;
there is declared an unnamed structure for which there is introduced an alias Structure. You may not introduce the same name Structure for a variable in the same scope where the structure is defined.
