Eroare de compilare: main.cpp:11:24: error: 'std::vector<std::pair<int, int> > select' redeclared as different kind of entity 11 | vector <pair<int,int>> select; | ^~~~~~ In file included from /usr/include/sys/types.h:179, from /usr/include/stdlib.h:395, from /usr/include/c++/12.2.1/bits/std_abs.h:38, from /usr/include/c++/12.2.1/cmath:47, from /usr/include/c++/12.2.1/x86_64-pc-linux-gnu/bits/stdc++.h:41, from main.cpp:1: /usr/include/sys/select.h:102:12: note: previous declaration 'int select(int, fd_set*, fd_set*, fd_set*, timeval*)' 102 | extern int select (int __nfds, fd_set *__restrict __readfds, | ^~~~~~ main.cpp: In function 'int main()': main.cpp:25:16: error: request for member 'clear' in 'select', which is of non-class type 'int(int, fd_set*, fd_set*, fd_set*, timeval*)' 25 | select.clear(); | ^~~~~ main.cpp:27:20: error: request for member 'push_back' in 'select', which is of non-class type 'int(int, fd_set*, fd_set*, fd_set*, timeval*)' 27 | select.push_back(heap.top()); | ^~~~~~~~~ main.cpp:30:33: warning: pointer to a function used in arithmetic [-Wpointer-arith] 30 | int mom_lib = select[k-1].first,nr_munc = select[k-1].second; | ^ cc1plus: warning: pointer to a function used in arithmetic [-Wpointer-arith] main.cpp:30:35: error: request for member 'first' in '*(select + (((sizetype)k) + 18446744073709551615))', which is of non-class type 'int(int, fd_set*, fd_set*, fd_set*, timeval*)' 30 | int mom_lib = select[k-1].first,nr_munc = select[k-1].second; | ^~~~~ main.cpp:33:31: warning: pointer to a function used in arithmetic [-Wpointer-arith] 33 | heap.push(select[i]); | ^ main.cpp:33:22: error: no matching function for call to 'std::priority_queue<std::pair<int, int>, std::vector<std::pair<int, int> >, std::greater<std::pair<int, int> > >::push(int (&)(int, fd_set*, fd_set*, fd_set*, timeval*))' 33 | heap.push(select[i]); | ~~~~~~~~~^~~~~~~~~~~ In file included from /usr/include/c++/12.2.1/queue:64, from /usr/include/c++/12.2.1/x86_64-pc-linux-gnu/bits/stdc++.h:86: /usr/include/c++/12.2.1/bits/stl_queue.h:738:7: note: candidate: 'void std::priority_queue<_Tp, _Sequence, _Compare>::push(const value_type&) [with _Tp = std::pair<int, int>; _Sequence = std::vector<std::pair<int, int> >; _Compare = std::greater<std::pair<int, int> >; value_type = std::pair<int, int>]' 738 | push(const value_type& __x) | ^~~~ /usr/include/c++/12.2.1/bits/stl_queue.h:738:30: note: no known conversion for argument 1 from 'int(int, fd_set*, fd_set*, fd_set*, timeval*)' to 'const std::priority_queue<std::pair<int, int>, std::vector<std::pair<int, int> >, std::greater<std::pair<int, int> > >::value_type&' {aka 'const std::pair<int, int>&'} 738 | push(const value_type& __x) | ~~~~~~~~~~~~~~~~~~^~~ /usr/include/c++/12.2.1/bits/stl_queue.h:746:7: note: candidate: 'void std::priority_queue<_Tp, _Sequence, _Compare>::push(value_type&&) [with _Tp = std::pair<int, int>; _Sequence = std::vector<std::pair<int, int> >; _Compare = std::greater<std::pair<int, int> >; value_type = std::pair<int, int>]' 746 | push(value_type&& __x) | ^~~~ /usr/include/c++/12.2.1/bits/stl_queue.h:746:25: note: no known conversion for argument 1 from 'int(int, fd_set*, fd_set*, fd_set*, timeval*)' to 'std::priority_queue<std::pair<int, int>, std::vector<std::pair<int, int> >, std::greater<std::pair<int, int> > >::value_type&&' {aka 'std::pair<int, int>&&'} 746 | push(value_type&& __x) | ~~~~~~~~~~~~~^~~ main.cpp:35:28: error: 'nr_munc' was not declared in this scope; did you mean 'trunc'? 35 | heap.push({mom_lib,nr_munc}); | ^~~~~~~ | trunc Non zero exit status: 1