Compilare: user.cpp: In function ‘void interclas(Point*, int, int, int)’: user.cpp:38:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = 0; i < k; i++) ^ user.cpp: In function ‘double closestDistance(int, int, Point*, Point&, Point&)’: user.cpp:105:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = st; i < dr; i++) ^ user.cpp:110:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t j = i + 1; j <= dr; j++) ^