要在ecilisp中创建一个计算器窗口，你可以使用GUI库，比如Tkinter。以下是一个简单的示例代码，展示了如何创建一个简单的计算器窗口：
(use-package "tk")
(tk-init)
(defparameter *calculator-window* (tk-toplevel))
(tk-title *calculator-window* "Calculator")
(defparameter *display* (tk-label *calculator-window* :text "0" :font '("Helvetica" 24)))
(tk-grid *display* :row 0 :column 0 :columnspan 4)
(defun update-display (text)
(tk-config *display* :text text))
(defun on-button-click (button)
(let ((text (tk-cget button :text)))
(if (string= text "C")
(update-display "0")
(update-display (format nil "~a~a" (tk-cget *display* :text) text))))
(defun create-button (text row column)
(let ((button (tk-button *calculator-window* :text text :command #'(lambda () (on-button-click button)))))
(tk-grid button :row row :column column)))
(loop for i from 1 to 9 do
(create-button (format nil "~a" i) (floor (/ (- i 1) 3) 3) (mod (- i 1) 3)))
(create-button "0" 3 0)
(create-button "+" 1 3)
(create-button "-" 2 3)
(create-button "*" 3 3)
(create-button "/" 4 3)
(create-button "=" 4 0)
(create-button "C" 4 1)
(tk-event-loop)
运行这个代码后，将会创建一个简单的计算器窗口，你可以点击按钮来进行基本的数学运算。你也可以根据自己的需求来定制窗口的样式和功能。
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