Compilare: user.cpp: In function ‘int imparte(char*)’: user.cpp:19:13: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(a[a[0]]==0 && a[0]>1)a[0]--; ^ user.cpp: In function ‘void inmultire(char*)’: user.cpp:30:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(t)a[++a[0]]=t; ^