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说说几种常见的错误....

Posted by hutu_2000 at 2009-04-21 10:28:57 on Problem 1410
1.线段可能在矩形内部
2.判断两个线段相交时,注意它们在一条直线上的情况
3.输入的左上(x1,y2)与右下(x2,y1),未必有x1<x2和y1<y2

望后来者尽早发现错误》。。

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