Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:23: error: conflicting declaration ‘std::ifstream fin’ user.cpp:9: error: ‘fin’ has a previous declaration as ‘int fin’ user.cpp:30: warning: statement has no effect user.cpp:46: error: request for member ‘close’ in ‘fin’, which is of non-class type ‘int’ user.cpp:9: warning: unused variable ‘nr’ user.cpp:9: warning: unused variable ‘fout’ user.cpp:9: warning: unused variable ‘c’