Eroare de compilare: In file included from /usr/include/c++/12.2.1/bits/stl_algobase.h:71, from /usr/include/c++/12.2.1/string:50, from /usr/include/c++/12.2.1/bits/locale_classes.h:40, from /usr/include/c++/12.2.1/bits/ios_base.h:41, from /usr/include/c++/12.2.1/ios:42, from /usr/include/c++/12.2.1/istream:38, from /usr/include/c++/12.2.1/fstream:38, from main.cpp:1: /usr/include/c++/12.2.1/bits/predefined_ops.h: In instantiation of 'constexpr bool __gnu_cxx::__ops::_Iter_comp_iter<_Compare>::operator()(_Iterator1, _Iterator2) [with _Iterator1 = ask*; _Iterator2 = ask*; _Compare = bool (*)(const muchie&, const muchie&)]': /usr/include/c++/12.2.1/bits/stl_algo.h:1809:14: required from 'constexpr void std::__insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = ask*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(const muchie&, const muchie&)>]' /usr/include/c++/12.2.1/bits/stl_algo.h:1849:25: required from 'constexpr void std::__final_insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = ask*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(const muchie&, const muchie&)>]' /usr/include/c++/12.2.1/bits/stl_algo.h:1940:31: required from 'constexpr void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = ask*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(const muchie&, const muchie&)>]' /usr/include/c++/12.2.1/bits/stl_algo.h:4853:18: required from 'constexpr void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = ask*; _Compare = bool (*)(const muchie&, const muchie&)]' main.cpp:63:5: required from here /usr/include/c++/12.2.1/bits/predefined_ops.h:158:30: error: invalid initialization of reference of type 'const muchie&' from expression of type 'ask' 158 | { return bool(_M_comp(*__it1, *__it2)); } | ~~~~~~~^~~~~~~~~~~~~~~~ /usr/include/c++/12.2.1/bits/predefined_ops.h: In instantiation of 'constexpr bool __gnu_cxx::__ops::_Val_comp_iter<_Compare>::operator()(_Value&, _Iterator) [with _Value = ask; _Iterator = ask*; _Compare = bool (*)(const muchie&, const muchie&)]': /usr/include/c++/12.2.1/bits/stl_algo.h:1789:20: required from 'constexpr void std::__unguarded_linear_insert(_RandomAccessIterator, _Compare) [with _RandomAccessIterator = ask*; _Compare = __gnu_cxx::__ops::_Val_comp_iter<bool (*)(const muchie&, const muchie&)>]' /usr/include/c++/12.2.1/bits/stl_algo.h:1817:36: required from 'constexpr void std::__insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = ask*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(const muchie&, const muchie&)>]' /usr/include/c++/12.2.1/bits/stl_algo.h:1849:25: required from 'constexpr void std::__final_insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = ask*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(const muchie&, const muchie&)>]' /usr/include/c++/12.2.1/bits/stl_algo.h:1940:31: required from 'constexpr void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = ask*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(const muchie&, const muchie&)>]' /usr/include/c++/12.2.1/bits/stl_algo.h:4853:18: required from 'constexpr void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = ask*; _Compare = bool (*)(const muchie&, const muchie&)]' main.cpp:63:5: required from here /usr/include/c++/12.2.1/bits/predefined_ops.h:240:30: error: invalid initialization of reference of type 'const muchie&' from expression of type 'ask' 240 | { return bool(_M_comp(__val, *__it)); } | ~~~~~~~^~~~~~~~~~~~~~ /usr/include/c++/12.2.1/bits/predefined_ops.h: In instantiation of 'constexpr bool __gnu_cxx::__ops::_Iter_comp_val<_Compare>::operator()(_Iterator, _Value&) [with _Iterator = ask*; _Value = ask; _Compare = bool (*)(const muchie&, const muchie&)]': /usr/include/c++/12.2.1/bits/stl_heap.h:140:48: required from 'constexpr void std::__push_heap(_RandomAccessIterator, _Distance, _Distance, _Tp, _Compare&) [with _RandomAccessIterator = ask*; _Distance = long int; _Tp = ask; _Compare = __gnu_cxx::__ops::_Iter_comp_val<bool (*)(const muchie&, const muchie&)>]' /usr/include/c++/12.2.1/bits/stl_heap.h:247:23: required from 'constexpr void std::__adjust_heap(_RandomAccessIterator, _Distance, _Distance, _Tp, _Compare) [with _RandomAccessIterator = ask*; _Distance = long int; _Tp = ask; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(const muchie&, const muchie&)>]' /usr/include/c++/12.2.1/bits/stl_heap.h:356:22: required from 'constexpr void std::__make_heap(_RandomAccessIterator, _RandomAccessIterator, _Compare&) [with _RandomAccessIterator = ask*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(const muchie&, const muchie&)>]' /usr/include/c++/12.2.1/bits/stl_algo.h:1629:23: required from 'constexpr void std::__heap_select(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = ask*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(const muchie&, const muchie&)>]' /usr/include/c++/12.2.1/bits/stl_algo.h:1900:25: required from 'constexpr void std::__partial_sort(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = ask*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(const muchie&, const muchie&)>]' /usr/include/c++/12.2.1/bits/stl_algo.h:1916:27: required from 'constexpr void std::__introsort_loop(_RandomAccessIterator, _RandomAccessIterator, _Size, _Compare) [with _RandomAccessIterator = ask*; _Size = long int; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(const muchie&, const muchie&)>]' /usr/include/c++/12.2.1/bits/stl_algo.h:1937:25: required from 'constexpr void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = ask*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(const muchie&, const muchie&)>]' /usr/include/c++/12.2.1/bits/stl_algo.h:4853:18: required from 'constexpr void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = ask*; _Compare = bool (*)(const muchie&, const muchie&)]' main.cpp:63:5: required from here /usr/include/c++/12.2.1/bits/predefined_ops.h:196:30: error: invalid initialization of reference of type 'const muchie&' from expression of type 'ask' 196 | { return bool(_M_comp(*__it, __val)); } | ~~~~~~~^~~~~~~~~~~~~~ Non zero exit status: 1