Borderou de evaluare (job #497303)

Eroare de compilare: In file included from /usr/include/c++/4.6/algorithm:63:0, from user.cpp:6: /usr/include/c++/4.6/bits/stl_algo.h: In function '_RandomAccessIterator std::__unguarded_partition(_RandomAccessIterator, _RandomAccessIterator, const _Tp&) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<MyStruct*, std::vector<MyStruct> >, _Tp = MyStruct]': /usr/include/c++/4.6/bits/stl_algo.h:2253:70: instantiated from '_RandomAccessIterator std::__unguarded_partition_pivot(_RandomAccessIterator, _RandomAccessIterator) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<MyStruct*, std::vector<MyStruct> >]' /usr/include/c++/4.6/bits/stl_algo.h:2284:54: instantiated from 'void std::__introsort_loop(_RandomAccessIterator, _RandomAccessIterator, _Size) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<MyStruct*, std::vector<MyStruct> >, _Size = int]' /usr/include/c++/4.6/bits/stl_algo.h:5407:4: instantiated from 'void std::sort(_RAIter, _RAIter) [with _RAIter = __gnu_cxx::__normal_iterator<MyStruct*, std::vector<MyStruct> >]' user.cpp:42:25: instantiated from here /usr/include/c++/4.6/bits/stl_algo.h:2212:4: error: no match for 'operator<' in '__first.__gnu_cxx::__normal_iterator<_Iterator, _Container>::operator* [with _Iterator = MyStruct*, _Container = std::vector<MyStruct>, __gnu_cxx::__normal_iterator<_Iterator, _Container>::reference = MyStruct&]() < __pivot' /usr/include/c++/4.6/bits/stl_algo.h:2212:4: note: candidates are: user.cpp:15:7: note: bool MyStruct::operator<(MyStruct&) user.cpp:15:7: note: no known conversion for argument 1 from 'const MyStruct' to 'MyStruct&' /usr/include/c++/4.6/bits/stl_pair.h:207:5: note: template<class _T1, class _T2> constexpr bool std::operator<(const std::pair<_T1, _T2>&, const std::pair<_T1, _T2>&) /usr/include/c++/4.6/bits/stl_iterator.h:291:5: note: template<class _Iterator> bool std::operator<(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_Iterator>&) /usr/include/c++/4.6/bits/stl_iterator.h:341:5: note: template<class _IteratorL, class _IteratorR> bool std::operator<(const std::reverse_iterator<_IteratorL>&, const std::reverse_iterator<_IteratorR>&) /usr/include/c++/4.6/bits/stl_iterator.h:1049:5: note: template<class _IteratorL, class _IteratorR> bool std::operator<(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorR>&) /usr/include/c++/4.6/bits/stl_iterator.h:1055:5: note: template<class _Iterator> bool std::operator<(const std::move_iterator<_Iterator>&, const std::move_iterator<_Iterator>&) /usr/include/c++/4.6/bits/basic_string.h:2510:5: note: template<class _CharT, class _Traits, class _Alloc> bool std::operator<(const std::basic_string<_CharT, _Traits, _Alloc>&, const std::basic_string<_CharT, _Traits, _Alloc>&) /usr/include/c++/4.6/bits/basic_string.h:2522:5: note: template<class _CharT, class _Traits, class _Alloc> bool std::operator<(const std::basic_string<_CharT, _Traits, _Alloc>&, const _CharT*) /usr/include/c++/4.6/bits/basic_string.h:2534:5: note: template<class _CharT, class _Traits, class _Alloc> bool std::operator<(const _CharT*, const std::basic_string<_CharT, _Traits, _Alloc>&) /usr/include/c++/4.6/bits/stl_vector.h:1290:5: note: template<class _Tp, class _Alloc> bool std::operator<(const std::vector<_Tp, _Alloc>&, const std::vector<_Tp, _Alloc>&) /usr/include/c++/4.6/tuple:586:5: note: template<class ... _TElements, class ... _UElements> bool std::operator<(const std::tuple<_TElements ...>&, const std::tuple<_Elements ...>&) /usr/include/c++/4.6/bits/stl_deque.h:272:5: note: template<class _Tp, class _Ref, class _Ptr> bool std::operator<(const std::_Deque_iterator<_Tp, _Ref, _Ptr>&, const std::_Deque_iterator<_Tp, _Ref, _Ptr>&) /usr/include/c++/4.6/bits/stl_deque.h:280:5: note: template<class _Tp, class _RefL, class _PtrL, class _RefR, class _PtrR> bool std::operator<(const std::_Deque_iterator<_Tp, _RefL, _PtrL>&, const std::_Deque_iterator<_Tp, _RefR, _PtrR>&) /usr/include/c++/4.6/bits/stl_deque.h:1935:5: note: template<class _Tp, class _Alloc> bool std::operator<(const std::deque<_Tp, _Alloc>&, const std::deque<_Tp, _Alloc>&) /usr/include/c++/4.6/bits/stl_stack.h:259:5: note: template<class _Tp, class _Seq> bool std::operator<(const std::stack<_Tp, _Seq>&, const std::stack<_Tp, _Seq>&) /usr/include/c++/4.6/bits/stl_algo.h:2215:4: error: passing 'const MyStruct' as 'this' argument of 'bool MyStruct::operator<(MyStruct&)' discards qualifiers [-fpermissive]