Compilare: user.cpp: In function ‘int main()’: user.cpp:33:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] if ( nrc[a[i]] == 0 ) ^ user.cpp:35:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] nrc[a[i]] = 1; ^ user.cpp:41:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] nrc[a[i]]++; ^ user.cpp:48:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] p[o[i]] = nr; ^ user.cpp:49:54: warning: array subscript has type ‘char’ [-Wchar-subscripts] if ( nr > maxput ) maxput = nr, ap = nrc[o[i]]; ^ user.cpp:51:47: warning: array subscript has type ‘char’ [-Wchar-subscripts] if ( nr == maxput ) ap += nrc[o[i]]; ^ user.cpp:57:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] po[i] = p[a[i]]; ^