A = ( 0 , 9 ) , B = ( 0 , 10 ) , C = ( 0 , 11 ) , D = ( 0 , 12 )
p1 . x = 0 , p1 . y = 9 ; p2 . x = 0 , p2 . y = 10 ; p3 . x = 0 , p3 . y = 11 ; p4 . x = 0 , p4 . y = 12 ; cout << no_of_quads ( p1 , p2 , p3 , p4 ) << endl ;