How to pass Entity name to defun

[topogigio]

Hello.

 

I'm new here and i'm a basic hobbist programmer in autolisp.

 

My problem Is this error:

 

Error: wrong (bad) function: < Entity name: ....>

 

This is my test code (simplified) , that would be modified to greater selection (ssget "_x" (list (0 .  "*Polyline ) (8 . "1"))

and a while loop that calls the function, where there are some if and while cycles ( a lisp that i created and works on a single Entity)

 

(setq selezione (ssget ":s")

(setq a (ssname selezione 0)


(defun estraz_vertici (elem)

(setq param ( entget elem))

(print param)

)


(Estraz_vertici (a))

 

I read that entity name Is a pointer (i have no advaced knowledge in programming) and i don't know how to work with It in this case.

 

Thank you in Advance 

Edited Thursday at 09:22 PM by SLW210
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[SLW210]

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[Steven P]

In LISP anything enclosed in () is a function

 

(Estraz_vertici (a)) means pass the result of function 'a' to function 'Estraz_vertici' - outside brackets to be a variable

 

I think you want

 

(Estraz_vertici a)