Eroare de compilare: In file included from /usr/include/c++/6/bits/stl_algobase.h:71:0, from /usr/include/c++/6/algorithm:61, from user.cpp:2: /usr/include/c++/6/bits/predefined_ops.h: In instantiation of ‘bool __gnu_cxx::__ops::_Iter_comp_iter<_Compare>::operator()(_Iterator1, _Iterator2) [with _Iterator1 = drum*; _Iterator2 = drum*; _Compare = bool (*)(int, int)]’: /usr/include/c++/6/bits/stl_algo.h:1844:14: required from ‘void std::__insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = drum*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(int, int)>]’ /usr/include/c++/6/bits/stl_algo.h:1882:25: required from ‘void std::__final_insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = drum*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(int, int)>]’ /usr/include/c++/6/bits/stl_algo.h:1968:31: required from ‘void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = drum*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(int, int)>]’ /usr/include/c++/6/bits/stl_algo.h:4739:18: required from ‘void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = drum*; _Compare = bool (*)(int, int)]’ user.cpp:36:19: required from here /usr/include/c++/6/bits/predefined_ops.h:125:18: error: cannot convert ‘drum’ to ‘int’ in argument passing { return bool(_M_comp(*__it1, *__it2)); } ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/6/bits/predefined_ops.h: In instantiation of ‘bool __gnu_cxx::__ops::_Val_comp_iter<_Compare>::operator()(_Value&, _Iterator) [with _Value = drum; _Iterator = drum*; _Compare = bool (*)(int, int)]’: /usr/include/c++/6/bits/stl_algo.h:1825:20: required from ‘void std::__unguarded_linear_insert(_RandomAccessIterator, _Compare) [with _RandomAccessIterator = drum*; _Compare = __gnu_cxx::__ops::_Val_comp_iter<bool (*)(int, int)>]’ /usr/include/c++/6/bits/stl_algo.h:1852:36: required from ‘void std::__insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = drum*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(int, int)>]’ /usr/include/c++/6/bits/stl_algo.h:1882:25: required from ‘void std::__final_insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = drum*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(int, int)>]’ /usr/include/c++/6/bits/stl_algo.h:1968:31: required from ‘void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = drum*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(int, int)>]’ /usr/include/c++/6/bits/stl_algo.h:4739:18: required from ‘void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = drum*; _Compare = bool (*)(int, int)]’ user.cpp:36:19: required from here /usr/include/c++/6/bits/predefined_ops.h:173:11: error: cannot convert ‘drum’ to ‘int’ in argument passing { return bool(_M_comp(__val, *__it)); } ^~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/6/bits/predefined_ops.h: In instantiation of ‘bool __gnu_cxx::__ops::_Iter_comp_val<_Compare>::operator()(_Iterator, _Value&) [with _Iterator = drum*; _Value = drum; _Compare = bool (*)(int, int)]’: /usr/include/c++/6/bits/stl_heap.h:129:48: required from ‘void std::__push_heap(_RandomAccessIterator, _Distance, _Distance, _Tp, _Compare) [with _RandomAccessIterator = drum*; _Distance = int; _Tp = drum; _Compare = __gnu_cxx::__ops::_Iter_comp_val<bool (*)(int, int)>]’ /usr/include/c++/6/bits/stl_heap.h:230:23: required from ‘void std::__adjust_heap(_RandomAccessIterator, _Distance, _Distance, _Tp, _Compare) [with _RandomAccessIterator = drum*; _Distance = int; _Tp = drum; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(int, int)>]’ /usr/include/c++/6/bits/stl_heap.h:335:22: required from ‘void std::__make_heap(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = drum*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(int, int)>]’ /usr/include/c++/6/bits/stl_algo.h:1669:23: required from ‘void std::__heap_select(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = drum*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(int, int)>]’ /usr/include/c++/6/bits/stl_algo.h:1930:25: required from ‘void std::__partial_sort(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = drum*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(int, int)>]’ /usr/include/c++/6/bits/stl_algo.h:1945:27: required from ‘void std::__introsort_loop(_RandomAccessIterator, _RandomAccessIterator, _Size, _Compare) [with _RandomAccessIterator = drum*; _Size = int; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(int, int)>]’ /usr/include/c++/6/bits/stl_algo.h:1965:25: required from ‘void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = drum*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(int, int)>]’ /usr/include/c++/6/bits/stl_algo.h:4739:18: required from ‘void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = drum*; _Compare = bool (*)(int, int)]’ user.cpp:36:19: required from here /usr/include/c++/6/bits/predefined_ops.h:147:11: error: cannot convert ‘drum’ to ‘int’ in argument passing { return bool(_M_comp(*__it, __val)); } ^~~~~~~~~~~~~~~~~~~~~~~~~~~ user.cpp: In function ‘void citire()’: user.cpp:26:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&m,&n); ^ user.cpp:29:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&v[i].d,&v[i].l); ^