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cstructdeclarationdefinition

What is the word after a struct?

struct Books
{
   char  title[50];
   char  author[50];
   char  subject[100];
   int   book_id;
} book;

What exactly is "book" at the end?

Solution

  • It is a declaration of an instance of a structure of type struct Books with name book.

    It is equivalent to

    struct Books
{
   char  title[50];
   char  author[50];
   char  subject[100];
   int   book_id;
};

struct Books book;

    Take into account that in general declarations look like (simplified form)

    type-sepcifier identifier;

    where identifier is some declarator. For example

    int x;

    And a structure definition also belongs to type specifiers.

    So you may write for example

    struct A { int x; } s;