Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:39:12: warning: variable ‘last_time’ set but not used [-Wunused-but-set-variable] int i, n, last_time; ^ In file included from /usr/include/c++/4.8/algorithm:62:0, from user.cpp:4: /usr/include/c++/4.8/bits/stl_algo.h: In instantiation of ‘_RandomAccessIterator std::__unguarded_partition(_RandomAccessIterator, _RandomAccessIterator, const _Tp&, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<_event*, std::vector<_event> >; _Tp = _event; _Compare = main()::__lambda0]’: /usr/include/c++/4.8/bits/stl_algo.h:2319:78: required from ‘_RandomAccessIterator std::__unguarded_partition_pivot(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<_event*, std::vector<_event> >; _Compare = main()::__lambda0]’ /usr/include/c++/4.8/bits/stl_algo.h:2360:62: required from ‘void std::__introsort_loop(_RandomAccessIterator, _RandomAccessIterator, _Size, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<_event*, std::vector<_event> >; _Size = int; _Compare = main()::__lambda0]’ /usr/include/c++/4.8/bits/stl_algo.h:5513:44: required from ‘void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = __gnu_cxx::__normal_iterator<_event*, std::vector<_event> >; _Compare = main()::__lambda0]’ user.cpp:46:96: required from here /usr/include/c++/4.8/bits/stl_algo.h:2287:35: error: no match for call to ‘(main()::__lambda0) (_event&, const _event&)’ while (__comp(*__first, __pivot)) ^ user.cpp:46:38: note: candidates are: sort(events.begin(), events.end(), [](_event &a, _event &b) -> bool {return a.time < b.time; }); ^ In file included from /usr/include/c++/4.8/algorithm:62:0, from user.cpp:4: /usr/include/c++/4.8/bits/stl_algo.h:2287:35: note: bool (*)(_event&, _event&) <conversion> while (__comp(*__first, __pivot)) ^ /usr/include/c++/4.8/bits/stl_algo.h:2287:35: note: candidate expects 3 arguments, 3 provided user.cpp:46:65: note: main()::__lambda0 sort(events.begin(), events.end(), [](_event &a, _event &b) -> bool {return a.time < b.time; }); ^ user.cpp:46:65: note: no known conversion for argument 2 from ‘const _event’ to ‘_event&’ In file included from /usr/include/c++/4.8/algorithm:62:0, from user.cpp:4: /usr/include/c++/4.8/bits/stl_algo.h:2290:34: error: no match for call to ‘(main()::__lambda0) (const _event&, _event&)’ while (__comp(__pivot, *__last)) ^ user.cpp:46:38: note: candidates are: sort(events.begin(), events.end(), [](_event &a, _event &b) -> bool {return a.time < b.time; }); ^ In file included from /usr/include/c++/4.8/algorithm:62:0, from user.cpp:4: /usr/include/c++/4.8/bits/stl_algo.h:2290:34: note: bool (*)(_event&, _event&) <conversion> while (__comp(__pivot, *__last)) ^ /usr/include/c++/4.8/bits/stl_algo.h:2290:34: note: candidate expects 3 arguments, 3 provided user.cpp:46:65: note: main()::__lambda0 sort(events.begin(), events.end(), [](_event &a, _event &b) -> bool {return a.time < b.time; }); ^ user.cpp:46:65: note: no known conversion for argument 1 from ‘const _event’ to ‘_event&’