Cant load function

i had write a simple code like this in notepad

(defun C:draw() (princ "a"))

and i save it as draw.lsp

in autocad 2011,i type (load "draw") but it return nil to me ...what it eh problem?

i had try to make other .lsp to run n no porblem occur but only this...

i had write a simple code like this in notepad

(defun C:draw() (princ "a"))

and i save it as draw.lsp

 

in autocad 2011,i type (load "draw") but it return nil to me ...what it eh problem?

 

i had try to make other .lsp to run n no porblem occur but only this...

Is the file in a support path?

What happens if you type (findfile "draw.lsp") ?

thx for ur reply

i had found the solutions for this problem

i use ctrl+a in notepad to highlight my contents ,many hightlight had appear with no text in it.After i delete the things n leave only the (defun C:draw()(princ"a")) on my program it works.

PS:i dont know y there are invisible hightlightable content shown in my program,meybe cause by tab or space buttons?

Another silly question to ask:

how do i use write-line function to write variable+string into file?

i try (write-line n+"ss" myoutputfile) and (write-line n&"ss" outputfile) but it doesnt work....

how to princ or write variable and string together in autolisp?

Another silly question to ask:

how do i use write-line function to write variable+string into file?

i try (write-line n+"ss" myoutputfile) and (write-line n&"ss" outputfile) but it doesnt work....

how to princ or write variable and string together in autolisp?

You have to use the OPEN function first.

i can and i know how to use write-line function.

my problem is how to write varibale n string into it?

As in other programming language ,we will use varible&"string"(vb) or variable+"string"(vc),how about in autolisp?

i search through begginner guide but no luck ....

You are looking to perform a string concatenation, so look into the strcat function.

k,i solve my problem now(ps:is this the only way?caz if my variable is not string type den i had to use convertion(eg:rtos)first den can only strcat the variable and "string" together)

my last 2 question ,First,anyway to use write function to output on the same line?

i dont want it to always output it on newline.

Second,is autolisp support nested looping?

when i use this code

(while pt1

(if (= n 1)

(write-line "a" outputfile)

(write-line "b" outputfile)

) )

i m sure that the if/while condition and openfile and other things is not wrong but

the write-line "b" wont work for me....maybe i misuse the if function or any syntax wrong for the above 5 lines code?

Use strcat to concatenate everything you want on one line.

To progn to wrap multiple statements to be evaluated as a single argument (similar to wrapping statements in '{' in C++ ).