Please let me know the real difference between these structures below:
typedef struct {
int info;
struct lista * prox
struct lista * ant;
} tipo_lista;
and this:
struct noCliente {
int tempoUtilizandoMesa;
struct noCliente *ant;
struct noCliente *prox;
};
typedef struct noCliente *CLIENTE;
In addition to member names, the first creates a new type that can be used anywhere in the code where a type fits, so tipo_lista becomes a type as much as int is a type.
In the second, create a structure called noCliente . This does not create a type, so if you want to instantiate it on an object you have to make it type struct noCliente , since the type is struct with a specialization.
Of course soon after this structure is used to create a type called CLIENTE which will always be a pointer, so it will be a type by reference that is not the default of structures. Using the pointer required the separation between the structure declaration and the type declaration.