Eroare de compilare: main.cpp:4:14: error: variable 'std::ifstream cin' has initializer but incomplete type ifstream cin ("cifra.in"); ^ main.cpp:6:15: error: variable 'std::ofstream cout' has initializer but incomplete type ofstream cout ("cifra.out"); ^ main.cpp: In function 'void decateori(int)': main.cpp:23:9: error: reference to 'cin' is ambiguous cin >>n; ^~~ main.cpp:4:10: note: candidates are: <typeprefixerror>cin ifstream cin ("cifra.in"); ^~~ In file included from main.cpp:1:0: /usr/include/c++/6/iostream:60:18: note: std::istream std::cin extern istream cin; /// Linked to standard input ^~~ main.cpp:25:9: error: reference to 'cout' is ambiguous cout <<sum<<endl; ^~~~ main.cpp:6:10: note: candidates are: <typeprefixerror>cout ofstream cout ("cifra.out"); ^~~~ In file included from main.cpp:1:0: /usr/include/c++/6/iostream:61:18: note: std::ostream std::cout extern ostream cout; /// Linked to standard output ^~~~ main.cpp: In function 'int main()': main.cpp:31:5: error: reference to 'cin' is ambiguous cin >>t; ^~~ main.cpp:4:10: note: candidates are: <typeprefixerror>cin ifstream cin ("cifra.in"); ^~~ In file included from main.cpp:1:0: /usr/include/c++/6/iostream:60:18: note: std::istream std::cin extern istream cin; /// Linked to standard input ^~~