Compilare: In file included from /usr/include/c++/12.2.1/unordered_map:46, from main.cpp:3: In member function 'std::_Hashtable<_Key, _Value, _Alloc, _ExtractKey, _Equal, _Hash, _RangeHash, _Unused, _RehashPolicy, _Traits>::size_type std::_Hashtable<_Key, _Value, _Alloc, _ExtractKey, _Equal, _Hash, _RangeHash, _Unused, _RehashPolicy, _Traits>::size() const [with _Key = char; _Value = std::pair<const char, Trie*>; _Alloc = std::allocator<std::pair<const char, Trie*> >; _ExtractKey = std::__detail::_Select1st; _Equal = std::equal_to<char>; _Hash = std::hash<char>; _RangeHash = std::__detail::_Mod_range_hashing; _Unused = std::__detail::_Default_ranged_hash; _RehashPolicy = std::__detail::_Prime_rehash_policy; _Traits = std::__detail::_Hashtable_traits<false, false, true>]', inlined from 'std::_Hashtable<_Key, _Value, _Alloc, _ExtractKey, _Equal, _Hash, _RangeHash, _Unused, _RehashPolicy, _Traits>::size_type std::_Hashtable<_Key, _Value, _Alloc, _ExtractKey, _Equal, _Hash, _RangeHash, _Unused, _RehashPolicy, _Traits>::_M_erase(std::true_type, const key_type&) [with _Key = char; _Value = std::pair<const char, Trie*>; _Alloc = std::allocator<std::pair<const char, Trie*> >; _ExtractKey = std::__detail::_Select1st; _Equal = std::equal_to<char>; _Hash = std::hash<char>; _RangeHash = std::__detail::_Mod_range_hashing; _Unused = std::__detail::_Default_ranged_hash; _RehashPolicy = std::__detail::_Prime_rehash_policy; _Traits = std::__detail::_Hashtable_traits<false, false, true>]' at /usr/include/c++/12.2.1/bits/hashtable.h:2348:15, inlined from 'std::_Hashtable<_Key, _Value, _Alloc, _ExtractKey, _Equal, _Hash, _RangeHash, _Unused, _RehashPolicy, _Traits>::size_type std::_Hashtable<_Key, _Value, _Alloc, _ExtractKey, _Equal, _Hash, _RangeHash, _Unused, _RehashPolicy, _Traits>::erase(const key_type&) [with _Key = char; _Value = std::pair<const char, Trie*>; _Alloc = std::allocator<std::pair<const char, Trie*> >; _ExtractKey = std::__detail::_Select1st; _Equal = std::equal_to<char>; _Hash = std::hash<char>; _RangeHash = std::__detail::_Mod_range_hashing; _Unused = std::__detail::_Default_ranged_hash; _RehashPolicy = std::__detail::_Prime_rehash_policy; _Traits = std::__detail::_Hashtable_traits<false, false, true>]' at /usr/include/c++/12.2.1/bits/hashtable.h:973:24, inlined from 'std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::size_type std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::erase(const key_type&) [with _Key = char; _Tp = Trie*; _Hash = std::hash<char>; _Pred = std::equal_to<char>; _Alloc = std::allocator<std::pair<const char, Trie*> >]' at /usr/include/c++/12.2.1/bits/unordered_map.h:763:26, inlined from 'void Trie::erase(const char*)' at main.cpp:69:20: /usr/include/c++/12.2.1/bits/hashtable.h:649:16: warning: 'ant' may be used uninitialized [-Wmaybe-uninitialized] 649 | { return _M_element_count; } | ^~~~~~~~~~~~~~~~ main.cpp: In member function 'void Trie::erase(const char*)': main.cpp:61:39: note: 'ant' was declared here 61 | Trie* ant; | ^~~