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  1. ; your code goes here
  2.  
  3. (let  ((size (read)))
  4.   (loop for y from 1 to size 
  5.     do (loop for x from 1 to size 
  6.         do (princ (if (or (= x  y) (= x (- size (- y 1) ))) "X" " "))
  7.     )
  8.     (format t "~%")
  9. ))
  10.  
Success #stdin #stdout 0.02s 10584KB
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stdin
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9
stdout
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X       X
 X     X 
  X   X  
   X X   
    X    
   X X   
  X   X  
 X     X 
X       X
https://ideone.com/KVJRvJ
language:
Common Lisp (clisp 2.49.92)
created:
8 years ago
visibility:
public

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