C Program for Passing individual structure elements

/* Passing individual structure elements */
main( )
{
struct book
{
char  name[25] ;
char  author[25] ;
int  callno ;
} ;
struct book b1 = { "Let us C", "YPK", 101 } ;

display ( b1.name, b1.author, b1.callno ) ;
}

display ( char  *s, char  *t, int  n )
{
printf ( "\n%s %s %d", s, t, n ) ;
}