View Compilation Error

0_0_2097787_30858.cpp: In function `lld xcross(Point&, Point&, Point&)':
0_0_2097787_30858.cpp:30: error: no matching function for call to `xcross(Point, Point)'
0_0_2097787_30858.cpp:25: note: candidates are: lld xcross(Point&, Point&)
0_0_2097787_30858.cpp:29: note:                 lld xcross(Point&, Point&, Point&)