Eroare de compilare: main.cpp:4:13: error: variable 'std::ifstream cin' has initializer but incomplete type 4 | ifstream cin("combinari.in"); | ^ main.cpp:5:14: error: variable 'std::ofstream cout' has initializer but incomplete type 5 | ofstream cout("combinari.out"); | ^ main.cpp: In function 'void backtracking(int)': main.cpp:12:5: error: reference to 'cout' is ambiguous 12 | cout<<v[i]<<" "; | ^~~~ In file included from main.cpp:1: /usr/include/c++/12.2.1/iostream:61:18: note: candidates are: 'std::ostream std::cout' 61 | extern ostream cout; /// Linked to standard output | ^~~~ main.cpp:5:10: note: '<typeprefixerror>cout' 5 | ofstream cout("combinari.out"); | ^~~~ main.cpp:14:1: error: reference to 'cout' is ambiguous 14 | cout<<'\n'; | ^~~~ /usr/include/c++/12.2.1/iostream:61:18: note: candidates are: 'std::ostream std::cout' 61 | extern ostream cout; /// Linked to standard output | ^~~~ main.cpp:5:10: note: '<typeprefixerror>cout' 5 | ofstream cout("combinari.out"); | ^~~~ main.cpp: In function 'void read()': main.cpp:28:1: error: reference to 'cin' is ambiguous 28 | cin>>n>>k; | ^~~ /usr/include/c++/12.2.1/iostream:60:18: note: candidates are: 'std::istream std::cin' 60 | extern istream cin; /// Linked to standard input | ^~~ main.cpp:4:10: note: '<typeprefixerror>cin' 4 | ifstream cin("combinari.in"); | ^~~ main.cpp: In function 'int main()': main.cpp:39:5: error: reference to 'cin' is ambiguous 39 | cin.tie(0); | ^~~ /usr/include/c++/12.2.1/iostream:60:18: note: candidates are: 'std::istream std::cin' 60 | extern istream cin; /// Linked to standard input | ^~~ main.cpp:4:10: note: '<typeprefixerror>cin' 4 | ifstream cin("combinari.in"); | ^~~ main.cpp:40:5: error: reference to 'cout' is ambiguous 40 | cout.tie(0); | ^~~~ /usr/include/c++/12.2.1/iostream:61:18: note: candidates are: 'std::ostream std::cout' Non zero exit status: 1