Compilare: user.cpp: In function ‘int main()’: user.cpp:29:10: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[ist][jst] = 1; ^ user.cpp:29:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[ist][jst] = 1; ^ user.cpp:36:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] iv = ic + di[d]; ^ user.cpp:37:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] jv = jc + dj[d]; ^