Eroare de compilare: user.cpp: In function ‘bool comparePoints(Point, Point)’: user.cpp:22:33: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] return (a.x<b.x)||(a.x==b.x)&&(a.y<b.y); ^ user.cpp: In function ‘void convexHull()’: user.cpp:34:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 2; i < v.size(); i++) { ^ user.cpp: In function ‘void read()’: user.cpp:45:5: error: reference to ‘cin’ is ambiguous cin>>n; ^ user.cpp:12:10: note: candidates are: std::ifstream cin ifstream cin("infasuratoare.in"); ^ In file included from user.cpp:1:0: /usr/include/c++/4.8/iostream:60:18: note: std::istream std::cin extern istream cin; /// Linked to standard input ^ user.cpp:48:9: error: reference to ‘cin’ is ambiguous cin>>v[i].x>>v[i].y; ^ user.cpp:12:10: note: candidates are: std::ifstream cin ifstream cin("infasuratoare.in"); ^ In file included from user.cpp:1:0: /usr/include/c++/4.8/iostream:60:18: note: std::istream std::cin extern istream cin; /// Linked to standard input ^ user.cpp: In function ‘void write()’: user.cpp:53:5: error: reference to ‘cout’ is ambiguous cout<<fixed; ^ user.cpp:13:10: note: candidates are: std::ofstream cout ofstream cout("infasuratoare.out"); ^ In file included from user.cpp:1:0: /usr/include/c++/4.8/iostream:61:18: note: std::ostream std::cout extern ostream cout; /// Linked to standard output ^ user.cpp:54:5: error: reference to ‘cout’ is ambiguous cout<<h.size()<<"\n"; ^ user.cpp:13:10: note: candidates are: std::ofstream cout ofstream cout("infasuratoare.out"); ^ In file included from user.cpp:1:0: /usr/include/c++/4.8/iostream:61:18: note: std::ostream std::cout extern ostream cout; /// Linked to standard output ^