Eroare de compilare: main.cpp:6:13: error: variable 'std::ifstream cin' has initializer but incomplete type ifstream cin("cifra.in"); ^ main.cpp:7:15: error: variable 'std::ofstream cout' has initializer but incomplete type ofstream cout ("cifra.out"); ^ main.cpp: In function 'void decateori(int)': main.cpp:24:9: error: reference to 'cin' is ambiguous cin >>n; ^~~ main.cpp:6:10: 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:26:9: error: reference to 'cout' is ambiguous cout <<sum<<endl; ^~~~ main.cpp:7:10: 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:32:5: error: reference to 'cin' is ambiguous cin >>t; ^~~ main.cpp:6:10: 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:31:9: warning: unused variable 'n' [-Wunused-variable] int n,s,t; ^ main.cpp:31:11: warning: unused variable 's' [-Wunused-variable] int n,s,t; ^