Compilare: user.cpp: In function ‘int main()’: user.cpp:21:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<strlen(s);i++) ^ user.cpp:40:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (v[a[i][a[i][0]]-96]) ^ user.cpp:42:45: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[a[i][1]-96]=v[a[i][a[i][0]]-96]+1; ^ user.cpp:43:40: warning: array subscript has type ‘char’ [-Wchar-subscripts] urm[i]=ult[a[i][a[i][0]]-96]; ^