Compilare: main.cpp: In function 'void update(int, nod*)': main.cpp:40:28: warning: array subscript has type 'char' [-Wchar-subscripts] if (nd->fii[dict[s[pos]]] == NULL) ^ main.cpp:42:28: warning: array subscript has type 'char' [-Wchar-subscripts] nd->fii[dict[s[pos]]] = new nod; ^ main.cpp:49:24: warning: array subscript has type 'char' [-Wchar-subscripts] nd->fii[dict[s[pos]]]->nr++; ^ main.cpp:53:38: warning: array subscript has type 'char' [-Wchar-subscripts] update(pos, nd->fii[dict[s[pos-1]]]); ^ main.cpp: In function 'int main()': main.cpp:92:15: warning: array subscript has type 'char' [-Wchar-subscripts] dict[a] = a - 'A'; ^ main.cpp:96:15: warning: array subscript has type 'char' [-Wchar-subscripts] dict[a] = a - 'a' + dict['Z'] + 1; ^ main.cpp:100:15: warning: array subscript has type 'char' [-Wchar-subscripts] dict[a] = a - '0' + dict['z'] + 1; ^