defining typedef struct in c

1#include <stdio.h>
2#include <string.h>
3 
4typedef struct Books {
5   char title[50];
6   char author[50];
7   char subject[100];
8   int book_id;
9} Book;
10 
11int main( ) {
12
13   Book book;
14 
15   strcpy( book.title, "C Programming");
16   strcpy( book.author, "Nuha Ali"); 
17   strcpy( book.subject, "C Programming Tutorial");
18   book.book_id = 6495407;
19 
20   printf( "Book title : %s\n", book.title);
21   printf( "Book author : %s\n", book.author);
22   printf( "Book subject : %s\n", book.subject);
23   printf( "Book book_id : %d\n", book.book_id);
24
25   return 0;
26}