ch0_struct.cpp

#include <stdio.h>
#include <string.h>

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

typedef struct _Books {
    char title[50];
    char author[50];
    char subject[100];
    int book_id;
} BOOKs;

typedef struct _Books BOOOKs;

BOOKs book1, book2;
struct Books book3, book4;
BOOOKs book5, book6;

struct packed_struct {
    unsigned int f1:1;
    unsigned int f2:1;
    unsigned int f3:1;
    unsigned int f4:1;
    unsigned int type:4;
    unsigned int my_int:9;
} pack;

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 */
   printf( "Book 1 title : %s\n", Book1.title);
   printf( "Book 1 author : %s\n", Book1.author);
   printf( "Book 1 subject : %s\n", Book1.subject);
   printf( "Book 1 book_id : %d\n", Book1.book_id);

   /* print Book2 info */
   printf( "Book 2 title : %s\n", Book2.title);
   printf( "Book 2 author : %s\n", Book2.author);
   printf( "Book 2 subject : %s\n", Book2.subject);
   printf( "Book 2 book_id : %d\n", Book2.book_id);

   printf("size of packed strcut: %d\n", (int) sizeof(struct packed_struct));
   printf("size of struct Books: %d\n", (int) sizeof(struct Books));

   return 0;
}