如何避免在最后打印的零？ [英] How can I avoid the nil printed in the end?

问题描述

我有codeD此功能，打印出董事会的状态，但在年底，由于这样的事实，心不是没有回报功​​能打印一个零！

I have coded this function that prints-out the state of the board, but in the end, due to the fact that there isnt no return the function prints an nil!

功能：

(defun show-board (board)
        (dotimes (number 8)
            (dotimes (number2 8)
                (let ((pos (aref board number number2))) 
                    (cond
                        ((equal pos 0) (format t "~a " "B"))   
                        ((equal pos 1) (format t "~a " "P"))
                        (t (format t "~a " "L")))))
                    (format t "~%")))

一个板是一个8x8的阵列！

A board is an 8x8 array!

在命令行函数调用的输出：

function call output on command lines:

B P B P B P B P
P B P B P B P B
B P B P B P B P
P B P B P B P B
B P B P B P B P
P B P B P B P B
B P B P B P B P
P B P B P B P B
NIL

我怎样才能摆脱NIL的??

How can i get rid of the NIL??

推荐答案

添加（值）作为回报形式 dotimes 将做到这一点：

adding (values) as return form for dotimes will do it:

(dotimes (number 8 (values))
   .....)

毕竟显示板确实不返回任何值吧？

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