Compilare: user.cpp: In function ‘void arbore(int, int, nod*)’: user.cpp:44:14: warning: unused variable ‘J’ [-Wunused-variable] nod* J; nod* Q; ^ user.cpp:44:22: warning: unused variable ‘Q’ [-Wunused-variable] nod* J; nod* Q; ^ user.cpp: In function ‘int main()’: user.cpp:113:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<sir.length(); i++) ^ user.cpp:137:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<sir.size(); i++) ^ user.cpp:156:10: warning: unused variable ‘C’ [-Wunused-variable] nod* C; ^