Eroare de compilare: In file included from /usr/include/c++/4.8/backward/hash_set:60:0, from user.cpp:19: /usr/include/c++/4.8/backward/backward_warning.h:32:2: 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. [-Wcpp] #warning \ ^ user.cpp:27:26: error: template argument 2 is invalid hash_set< int, hash<int> > v; ^ user.cpp:27:29: error: invalid type in declaration before ‘;’ token hash_set< int, hash<int> > v; ^ user.cpp: In function ‘int main()’: user.cpp:38:23: error: request for member ‘insert’ in ‘v’, which is of non-class type ‘int’ case 1: v.insert(y); break; ^ user.cpp:39:23: error: request for member ‘erase’ in ‘v’, which is of non-class type ‘int’ case 2: v.erase(y); break; ^ user.cpp:40:30: error: request for member ‘end’ in ‘v’, which is of non-class type ‘int’ case 3: out<<( v.end() != v.find(y))<<'\n'; break; ^ user.cpp:40:41: error: request for member ‘find’ in ‘v’, which is of non-class type ‘int’ case 3: out<<( v.end() != v.find(y))<<'\n'; break; ^