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直觉上这道题目会有精度问题...

Posted by chaeyeon at 2009-11-09 21:14:11
In Reply To:哈尔滨的C怎么做的？ Posted by:Zeor at 2009-11-09 16:11:02 
求圆的切线如果用了acos之类的话,估计精度会飘的比较远~
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