[racket] how to design programs chap5 error!!!

From: 邢泉 (im at e.zc0.net)
Date: Sun Nov 28 06:58:30 EST 2010

Hi:

Help Me! Thanks!  

> (master check-color)
check-color: this is a procedure, so it must be applied to arguments (which requires using a parenthesis before the name)


2010-11-28 



Q.Xing
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