WAP to Passing address of a structure variable

/*WAP to Passing address of a structure variable */

#include<stdio.h>
#include<conio.h>
struct book 
{
 char  name[25] ;
 char  author[25] ;
 int  callno ;
} ;

main( )
{
 struct book  b1 = { "Let us C", "YPK", 101 } ;
 display ( &b1 ) ;
       getch();
}

display ( struct book  *b )
{
 printf ( "\n%s %s %d", b->name, b->author, b->callno ) ;
}