Compilare: In file included from /usr/local/include/c++/4.8.0/backward/hash_map:60:0, from user.cpp:4: /usr/local/include/c++/4.8.0/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: In member function ‘uint32& HashTable::operator[](uint32)’: user.cpp:77:13: warning: unused variable ‘i’ [-Wunused-variable] int i = 0; ^ user.cpp:78:13: warning: unused variable ‘j’ [-Wunused-variable] int j = table[hash].size(); ^ user.cpp: In function ‘int main()’: user.cpp:205:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (distincts > L-1) ^ user.cpp:232:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (distincts > U) ^