Compilare: user.cpp: In function ‘int main()’: user.cpp:28:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] long sum=width[char(a[0])]; ^ user.cpp:36:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] sum+=width[char(a[i])]; ^ user.cpp:50:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (sum+width[char(a[i])]>W-3) ^ user.cpp:58:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] sum+=width[char(a[i])]; ^