Compilare: In file included from /usr/include/c++/12.2.1/bits/exception_ptr.h:43, from /usr/include/c++/12.2.1/exception:168, from /usr/include/c++/12.2.1/ios:39, from /usr/include/c++/12.2.1/ostream:38, from /usr/include/c++/12.2.1/iostream:39, from main.cpp:1: In function 'constexpr std::_Require<std::__not_<std::__is_tuple_like<_Tp> >, std::is_move_constructible<_Tp>, std::is_move_assignable<_Tp> > std::swap(_Tp&, _Tp&) [with _Tp = int]', inlined from 'void del(int)' at main.cpp:62:9: /usr/include/c++/12.2.1/bits/move.h:204:11: warning: 'nod' may be used uninitialized [-Wmaybe-uninitialized] 204 | _Tp __tmp = _GLIBCXX_MOVE(__a); | ^~~~~ main.cpp: In function 'void del(int)': main.cpp:54:9: note: 'nod' was declared here 54 | int nod, i; | ^~~