Compilare: user.cpp: In function ‘void Add(std::__cxx11::string, Node*)’: user.cpp:30:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (node->next[c] == nullptr) { ^ user.cpp:31:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] node->next[c] = new Node; ^ user.cpp:34:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] node = node->next[c]; ^ user.cpp: In function ‘void Delete(std::__cxx11::string, Node*)’: user.cpp:47:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] node = node->next[c]; ^ user.cpp:58:33: warning: array subscript has type ‘char’ [-Wchar-subscripts] node = last_word->next[c]; ^ user.cpp:59:26: warning: array subscript has type ‘char’ [-Wchar-subscripts] last_word->next[c] = nullptr; ^ user.cpp:66:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] aux = node->next[c]; ^ user.cpp: In function ‘int Count(std::__cxx11::string, Node*)’: user.cpp:81:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (node->next[c] == nullptr) { ^ user.cpp:84:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] node = node->next[c]; ^ user.cpp: In function ‘int Find(std::__cxx11::string, Node*)’: user.cpp:96:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (node->next[c] == nullptr) { ^ user.cpp:99:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] node = node->next[c]; ^