Eroare de compilare: In file included from /usr/include/c++/4.8/backward/hash_set:60:0, from user.cpp:3: /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:13:1: error: ‘hash_set’ does not name a type hash_set<int> H; ^ user.cpp: In function ‘int main()’: user.cpp:25:13: error: ‘H’ was not declared in this scope H.insert(x); ^ user.cpp:31:9: error: ‘hash_set’ was not declared in this scope hash_set<int>::iterator it = H.find(x); ^ user.cpp:31:9: note: suggested alternative: In file included from user.cpp:3:0: /usr/include/c++/4.8/backward/hash_set:84:11: note: ‘__gnu_cxx::hash_set’ class hash_set ^ user.cpp:31:18: error: expected primary-expression before ‘int’ hash_set<int>::iterator it = H.find(x); ^ user.cpp:31:18: error: expected ‘;’ before ‘int’ user.cpp:32:13: error: ‘it’ was not declared in this scope if (it != H.end()) ^ user.cpp:32:19: error: ‘H’ was not declared in this scope if (it != H.end()) ^