Eroare de compilare: main.cpp:10:13: error: variable 'std::ifstream cin' has initializer but incomplete type ifstream cin("dreptunghi.in"); ^ main.cpp:11:14: error: variable 'std::ofstream cout' has initializer but incomplete type ofstream cout("dreptunghi.out"); ^ main.cpp: In function 'int main()': main.cpp:15:15: error: reference to 'cin' is ambiguous int n, m; cin >> n >> m; ^~~ main.cpp:10:10: note: candidates are: <typeprefixerror>cin ifstream cin("dreptunghi.in"); ^~~ In file included from main.cpp:2:0: /usr/include/c++/6/iostream:60:18: note: std::istream std::cin extern istream cin; /// Linked to standard input ^~~ main.cpp:17:9: error: reference to 'cout' is ambiguous cout << n; ^~~~ main.cpp:11:10: note: candidates are: <typeprefixerror>cout ofstream cout("dreptunghi.out"); ^~~~ In file included from main.cpp:2:0: /usr/include/c++/6/iostream:61:18: note: std::ostream std::cout extern ostream cout; /// Linked to standard output ^~~~ main.cpp:31:5: error: reference to 'cout' is ambiguous cout << ans + b; ^~~~ main.cpp:11:10: note: candidates are: <typeprefixerror>cout ofstream cout("dreptunghi.out"); ^~~~ In file included from main.cpp:2:0: /usr/include/c++/6/iostream:61:18: note: std::ostream std::cout extern ostream cout; /// Linked to standard output ^~~~ Non zero exit status: 1