Eroare de compilare: user.cpp: In function ‘int expresie()’: user.cpp:12:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:17:18: error: no matching function for call to ‘std::basic_ifstream<char>::getline(std::__cxx11::string&)’ fi.getline(in); ^ In file included from /usr/include/c++/5/sstream:38:0, from /usr/include/c++/5/complex:45, from /usr/include/c++/5/ccomplex:38, from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52, from user.cpp:1: /usr/include/c++/5/istream:647:5: note: candidate: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::getline(std::basic_istream<_CharT, _Traits>::char_type*, std::streamsize, std::basic_istream<_CharT, _Traits>::char_type) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::char_type = char; std::streamsize = long int] basic_istream<char>:: ^ /usr/include/c++/5/istream:647:5: note: candidate expects 3 arguments, 1 provided /usr/include/c++/5/istream:427:7: note: candidate: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::getline(std::basic_istream<_CharT, _Traits>::char_type*, std::streamsize) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>; std::basic_istream<_CharT, _Traits>::char_type = char; std::streamsize = long int] getline(char_type* __s, streamsize __n) ^ /usr/include/c++/5/istream:427:7: note: candidate expects 2 arguments, 1 provided user.cpp:18:11: error: ‘n’ was not declared in this scope fi >> n; ^ user.cpp:20:15: error: ‘ch’ was not declared in this scope fi >> ch; ^ user.cpp:22:9: error: ‘i’ was not declared in this scope i = 0; ^