View Compilation Error

0_0_2786881_19290.cpp: In function `point operator-(const point&, const point&)':
0_0_2786881_19290.cpp:12: error: no matching function for call to `point::point(int, int)'
0_0_2786881_19290.cpp:7: note: candidates are: point::point()
0_0_2786881_19290.cpp:7: note:                 point::point(const point&)