Problems with read function in lisp

Question

I'm trying to make a prompt for user input, but each time i call this function, instead of printing the ":", it waits until I press something and after that prints the character ":".

I can't find anything on the web.

(defun MovimientoAdversario ()
  (let ((aux))
    (format t "~% :")
    (setf aux (read))))

possible duplicate of slime prints my (format ...) calls only when called function ends — Joshua Taylor
– Joshua Taylor, Commented Oct 28, 2013 at 18:14
This doesn't actually have much to do with read, except that it happens to be the next input/output operation. You just need to flush the output buffer (which the possible duplicate) describes how to do. — Joshua Taylor
– Joshua Taylor, Commented Oct 28, 2013 at 18:15

Frédéric Hamidi · Accepted Answer · 2013-10-28 10:35:52Z

2

Try flushing the output buffers before reading:

(format t "~% :")
(force-output)
(setf aux (read))

answered Oct 28, 2013 at 10:35

Frédéric Hamidi

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1 Comment

Basilio Hinojosa del Castillo Over a year ago

Thank you very much! You save my sorry a.. . Thank you! Thank you!

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