Eroare de compilare: user.cpp: In function ‘double Dist(Line, Point)’: user.cpp:60:18: error: ‘fabs’ is not a member of ‘std’ return (double)std::fabs(line.a * P.x + line.b * P.y + line.c) / std::sqrt(line.a * line.a + line.b * line.b); ^~~ user.cpp:60:68: error: ‘sqrt’ is not a member of ‘std’ return (double)std::fabs(line.a * P.x + line.b * P.y + line.c) / std::sqrt(line.a * line.a + line.b * line.b); ^~~ user.cpp: In function ‘void ReadInput()’: user.cpp:64:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:66:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] double x, y; scanf("%lf%lf", &x, &y); ^