Eroare de compilare: main.cpp:4:13: error: variable 'std::ifstream cin' has initializer but incomplete type ifstream cin("fact.in"); ^ main.cpp:5:14: error: variable 'std::ofstream cout' has initializer but incomplete type ofstream cout("fact.out"); ^ main.cpp: In function 'int main()': main.cpp:10:5: error: reference to 'cin' is ambiguous cin>>p; ^~~ main.cpp:4:10: note: candidates are: <typeprefixerror>cin ifstream cin("fact.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:30:14: error: reference to 'cout' is ambiguous if(ok==0) cout<<"-1"; ^~~~ main.cpp:5:10: note: candidates are: <typeprefixerror>cout ofstream cout("fact.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:31:9: error: reference to 'cout' is ambiguous else cout<<m; ^~~~ main.cpp:5:10: note: candidates are: <typeprefixerror>cout ofstream cout("fact.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 ^~~~ Non zero exit status: 1