Compilare: user.cpp: In member function ‘void Trie::addWord(TrieNode*, const string&, int)’: user.cpp:24:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos == word.size()) { ^ user.cpp: In member function ‘bool Trie::deleteWord(TrieNode*, const string&, int)’: user.cpp:37:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos == word.size()) { ^ user.cpp: In member function ‘int Trie::count(TrieNode*, const string&, int)’: user.cpp:59:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos == word.size()) { ^ user.cpp: In member function ‘int Trie::longestPrefix(TrieNode*, const string&, int)’: user.cpp:72:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos == word.size()) { ^ user.cpp: In member function ‘bool Trie::deleteWord(const string&)’: user.cpp:95:3: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In member function ‘int Trie::count(const string&)’: user.cpp:99:3: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In member function ‘int Trie::longestPrefix(const string&)’: user.cpp:103:3: warning: no return statement in function returning non-void [-Wreturn-type] } ^