C Program for Demo of union at work

/* Demo of union at work */
main( )
{
union a
{
int  i ;
char  ch[2] ;
} ;
union a  key ;
key.i = 512 ;
printf ( "\nkey.i = %d", key.i ) ;
printf ( "\nkey.ch[0] = %d", key.ch[0] ) ;
printf ( "\nkey.ch[1] = %d", key.ch[1] ) ;
}