Compilare: user.cpp: In function ‘int main()’: user.cpp:27:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] if((a[j]-'a')>(w[j]-'a')) ^ user.cpp:27:35: warning: array subscript has type ‘char’ [-Wchar-subscripts] if((a[j]-'a')>(w[j]-'a')) ^ user.cpp:37:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] w[j]=a[j]; ^ user.cpp:37:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] w[j]=a[j]; ^ user.cpp:45:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] s[i][j]=a[j]; ^ user.cpp:45:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] s[i][j]=a[j]; ^