Compilare: user.cpp: In function ‘void addCenters(double, std::pair<double, double>, std::pair<double, double>)’: user.cpp:56:22: warning: suggest parentheses around assignment used as truth value [-Wparentheses] else if (P1.y = P2.y) ^ user.cpp: In function ‘int main()’: user.cpp:121:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < points.size(); i++) ^ user.cpp: In function ‘void addCenters(double, std::pair<double, double>, std::pair<double, double>)’: user.cpp:80:17: warning: ‘C’ may be used uninitialized in this function [-Wmaybe-uninitialized] B2 = 2 * B * C; ^ user.cpp:39:9: warning: ‘A’ may be used uninitialized in this function [-Wmaybe-uninitialized] double A, B, C; ^