.


:




:

































 

 

 

 





, . , S, .

in (X, S). X S.


9,



'" S -
X S -

add (S, X, SI). S1.

del (S, X, SI). 31.

add. , , . . 9.6 , . addleaf (D, X, Dl>.





 


, 9.6. ; : addf Dl, 6, D2>, addf D2, 7, D3), addt 03, 4, D4)

.

X t (nil, X, nil).

X D, DI = D ( ).

D X, X D; D

X, X .

9.4.

9.4.

% addleaf [ Tree, X, NewTree):

X :": Tree % NewTree

addleaft nil, X, t(nil, X, nil)).

addleaf! t(Left, X, Right), X, t(Left, X, Right)).



I. Prolog


addleaft t(Left, Boot, Right), X, t(Leftlr Root, Right)):-gt Root, X), addleaft Left, X, Leftl).

addleafl t(Left, Root, Right), X, t (, Left, Root, Rightl)):-gt (X, Root), addleaft Right, , Rightl).

. , . , .

delleaf{ D1, X, D2):-addleaf (D2, >:, Dl).

, X , , . 9.7. X . Left Right. X Left Right . X ( ), .



 






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