Which command could be used to clear screen in CLISP?

Such as cls for cmd.exe. It's very 开发者_StackOverflow社区annoy if I can't do this.

You can use screen:clear-window to do this:

(screen:with-window (screen:clear-window screen:*window*))

For more information see the documentation on screen. Also note that these functions are specific to clisp.

That didn't work for me but this did (acquired from the link)

(screen:clear-window (screen:make-window))

if you are running clisp inside emacs

C-c M-o

which of course is

Control-C Alt-o  -or-
Control-C Meta-o

this is the default keybinding to call "clear buffer" from the "repl" menu.

Depending on what terminal you're using(support for ANSI control sequences, for example on most *nix), you could try:

(defun cls()
  (format t "~A[H~@*~A[J" #\escape))

Then call it:

(cls)

CLISP UNDER WINDOWS

(ext:run-shell-command "cls")

(defun cls () (ext:run-shell-command "cls") )

then write in the repl

(cls) and voila

(loop for x from 1 to 1400 do (princ " ")
)

Nilambar this is for clisp 2.49 running under windows

When you are learning like me make a lot of test, try, error, abort etc and screen of repl or interpreter its a pigsty of that trys and its difficult to beginer to found the results to new trys then you type (ext:run-shell-comand "cls") and the repl clean it screen and the prompt go to upper left corner.