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About function define

bobbygang

Hi, I wrote function define code like this :

procedure(MMM(A B C D E)
                   setplist(A '(B D C E))
                   F=getqq(A B)
                   F
)

I want to achieve that when I input :    MMM(bobby xx (1 2 ) yy (3 4))

it will give me the result :        (1 2)

But it always tell me          *Error* eval : unbound variable  -bobby

Does it mean that when I use the function MMM I should define symbol "bobby" "xx" "yy" first?

I think it's too cumbersome. How to solve this problem ?

Parents

  •  Hi Bobby,

    I can't quite figure out what you are trying to do. In this case you appear to be calling the procedure incorrectly, you would need to do something like this instead:  

    MMM('bobby 'xx '(1 2) 'yy '(3 4))  (you could call "list(1 2)" instead of '(1 2) also).

    But even then the code probably wouldn't work.  If you call MMM with just "bobby" the SKILL interpreter will look for a variable (or function) that matches the symbol bobby and it is not finding one.  If you make the procedure an nprocedure then it might start to work the way you might want it to,  something like 

    nprocedure(MMM(args)
  let( (h)
    when(h=car(args)
      setplist(h cdr(args))
      F=getqq(h cadr(args))
    ); when
  ); let
); nprocedure

MMM(bobby xx (1 2) yy (3 4))
=> (1 2)
bobby.xx
=> (1 2)
bobby.yy
=> (3 4)
F
    => (1 2)

    Is this what you are looking for?

    Regards,

    Lawrence.

Reply

  •  Hi Bobby,

    I can't quite figure out what you are trying to do. In this case you appear to be calling the procedure incorrectly, you would need to do something like this instead:  

    MMM('bobby 'xx '(1 2) 'yy '(3 4))  (you could call "list(1 2)" instead of '(1 2) also).

    But even then the code probably wouldn't work.  If you call MMM with just "bobby" the SKILL interpreter will look for a variable (or function) that matches the symbol bobby and it is not finding one.  If you make the procedure an nprocedure then it might start to work the way you might want it to,  something like 

    nprocedure(MMM(args)
  let( (h)
    when(h=car(args)
      setplist(h cdr(args))
      F=getqq(h cadr(args))
    ); when
  ); let
); nprocedure

MMM(bobby xx (1 2) yy (3 4))
=> (1 2)
bobby.xx
=> (1 2)
bobby.yy
=> (3 4)
F
    => (1 2)

    Is this what you are looking for?

    Regards,

    Lawrence.

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