指向结构的指针

#include <stdio.h>

#include <string.h>



struct Books {

   char  title[50];

   char  author[50];

   char  subject[100];

   int   book_id;

};



/* function declaration */

void printBook( struct Books *book );

int main( ) {



   struct Books Book1;        /* Declare Book1 of type Book */

   struct Books Book2;        /* Declare Book2 of type Book */



   /* book 1 specification */

   strcpy( Book1.title, "C Programming");

   strcpy( Book1.author, "Nuha Ali");

   strcpy( Book1.subject, "C Programming Tutorial");

   Book1.book_id = 6495407;



   /* book 2 specification */

   strcpy( Book2.title, "Telecom Billing");

   strcpy( Book2.author, "Zara Ali");

   strcpy( Book2.subject, "Telecom Billing Tutorial");

   Book2.book_id = 6495700;



   /* print Book1 info by passing address of Book1 */

   printBook( &Book1 );



   /* print Book2 info by passing address of Book2 */

   printBook( &Book2 );



   return 0;

}



void printBook( struct Books *book ) {



   printf( "Book title : %s\n", book->title);

   printf( "Book author : %s\n", book->author);

   printf( "Book subject : %s\n", book->subject);

   printf( "Book book_id : %d\n", book->book_id);

}