Lisp：EVAL/APPLY：提供给 INSERTBST 错误的参数太少（1 个而不是至少 2 个）

Question

有谁知道为什么我收到此代码的 EVAL/APPLY: Too few arguments (1 instead of at least 2) given to INSERTBST 错误，谢谢。

 (defun insertbst (E tree)
        (cond ((null tree) (list E nil nil))
            (( = E (car tree)) tree)
            (( < E (car tree))
             (list (car tree) (insertbst E (cadr tree))
                   (caddr tree)))
            ( t (list (car tree) (cadr tree) (insertbst E (caddr tree))))))
    
    (print(insertbst'(8 (3 (1 () ()) (6 (4 () ())( 7 () ()))) (10 (()) (14 (13) ())))))

Answer 1

你应该用数字和树来称呼它。顺便说一句，你树中的一些节点没有两个后代，所以我更正了：

(insertbst 15 '(8 (3 (1 () ()) 
                     (6 (4 () ())
                        ( 7 () ())))
                  (10 () 
                      (14 (13 () ())
                          ()))))

=> (8 (3 (1 NIL NIL) (6 (4 NIL NIL) (7 NIL NIL))) (10 NIL (14 (13 NIL NIL) (15 NIL NIL))))

Lisp：EVAL/APPLY：提供给 INSERTBST 错误的参数太少（1 个而不是至少 2 个）

Lisp: EVAL/APPLY: Too few arguments (1 instead of at least 2) given to INSERTBST error

lisp

common-lisp