Compilare: In file included from /usr/include/c++/4.4/backward/hash_set:60, from user.cpp:5: /usr/include/c++/4.4/backward/backward_warning.h:28:2: warning: #warning This file includes at least one deprecated or antiquated header which may be removed without further notice at a future date. Please use a non-deprecated interface with equivalent functionality instead. For a listing of replacement headers and interfaces, consult the file backward_warning.h. To disable this warning use -Wno-deprecated. user.cpp:66: warning: integer constant is too large for ‘long’ type user.cpp: In member function ‘void Eratosthenes::getprimes()’: user.cpp:61: warning: unused variable ‘aux’ user.cpp: In function ‘int main()’: user.cpp:101: warning: unused variable ‘i’