Compilare: user.cpp: In member function ‘int Trie::increaseRelevance(Trie*&, const int&, const string&, const int&)’: user.cpp:52:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (index < name.size()) ^ user.cpp: In member function ‘void Trie::insertWord(const string&)’: user.cpp:71:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < name.size(); i++) ^ user.cpp: In member function ‘std::string Trie::searchWord(const string&)’: user.cpp:85:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < name.size(); i++) ^