0_0_1676170_20658.cpp: In function `int CalCrossPoint(Line&, Line&, Point&)':
0_0_1676170_20658.cpp:143: error: `dlcmp' undeclared (first use this function)
0_0_1676170_20658.cpp:143: error: (Each undeclared identifier is reported only once for each function it appears in.)
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