Compilare: user.cpp: In function ‘void extend(char)’: user.cpp:32:50: warning: array subscript has type ‘char’ [-Wchar-subscripts] for (p = last; p != -1 && !states[p].tranz[ch]; p = states[p].link) ^ user.cpp:33:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] states[p].tranz[ch] = current; ^ user.cpp:36:35: warning: array subscript has type ‘char’ [-Wchar-subscripts] int q = states[p].tranz[ch]; ^ user.cpp:47:49: warning: array subscript has type ‘char’ [-Wchar-subscripts] for (; p != -1 && states[p].tranz[ch] == q; p = states[p].link) ^ user.cpp:48:35: warning: array subscript has type ‘char’ [-Wchar-subscripts] states[p].tranz[ch] = clone; ^