Compilare: user.cpp: In function ‘std::vector<Point> IntersectCircles(const Circle&, const Circle&)’: user.cpp:20:20: warning: ‘x1’ may be used uninitialized in this function [-Wmaybe-uninitialized] this->x = x; ^ user.cpp:87:20: note: ‘x1’ was declared here double x0, x1, y0, y1; ^ user.cpp:20:20: warning: ‘x0’ may be used uninitialized in this function [-Wmaybe-uninitialized] this->x = x; ^ user.cpp:87:16: note: ‘x0’ was declared here double x0, x1, y0, y1; ^ user.cpp:21:20: warning: ‘y1’ may be used uninitialized in this function [-Wmaybe-uninitialized] this->y = y; ^ user.cpp:83:20: note: ‘y1’ was declared here double y0, y1; ^ user.cpp:21:20: warning: ‘y0’ may be used uninitialized in this function [-Wmaybe-uninitialized] this->y = y; ^ user.cpp:83:16: note: ‘y0’ was declared here double y0, y1; ^