Compilare: user.cpp: In function ‘int main()’: user.cpp:33:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] iv = ic + di[d]; ^ user.cpp:34:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] jv = jc + dj[d]; ^ user.cpp:35:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] kv = kc + dk[d]; ^