Compilare: user.cpp: In member function ‘int trie::is(int)’: user.cpp:16:2: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In member function ‘int trie::next(int)’: user.cpp:26:2: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:52:27: warning: ‘adr’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<Ans<<' '<<ast<<' '<<adr<<'\n'; ^ user.cpp:52:17: warning: ‘ast’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<Ans<<' '<<ast<<' '<<adr<<'\n'; ^