Eroare de compilare: user.cpp:58:22: error: ‘Punc2D’ does not name a type bool operator<(const Punc2D& A,const Punct2D& B) ^ user.cpp:58:30: error: ISO C++ forbids declaration of ‘A’ with no type [-fpermissive] bool operator<(const Punc2D& A,const Punct2D& B) ^ user.cpp: In function ‘bool operator<(const int&, const Punct2D&)’: user.cpp:60:12: error: request for member ‘y’ in ‘A’, which is of non-class type ‘const int’ if(A.y<=B.y) ^ In file included from /usr/include/c++/4.8/algorithm:62:0, from user.cpp:3: /usr/include/c++/4.8/bits/stl_algo.h: In instantiation of ‘_OIter std::merge(_IIter1, _IIter1, _IIter2, _IIter2, _OIter) [with _IIter1 = __gnu_cxx::__normal_iterator<Punct2D*, std::vector<Punct2D> >; _IIter2 = __gnu_cxx::__normal_iterator<Punct2D*, std::vector<Punct2D> >; _OIter = __gnu_cxx::__normal_iterator<Punct2D*, std::vector<Punct2D> >]’: user.cpp:99:114: required from here /usr/include/c++/4.8/bits/stl_algo.h:5562:18: error: no match for ‘operator<’ (operand types are ‘Punct2D’ and ‘Punct2D’) if (*__first2 < *__first1) ^ /usr/include/c++/4.8/bits/stl_algo.h:5562:18: note: candidates are: In file included from /usr/include/c++/4.8/bits/stl_algobase.h:64:0, from /usr/include/c++/4.8/bits/char_traits.h:39, from /usr/include/c++/4.8/ios:40, from /usr/include/c++/4.8/ostream:38, from /usr/include/c++/4.8/iostream:39, from user.cpp:1: /usr/include/c++/4.8/bits/stl_pair.h:220:5: note: template<class _T1, class _T2> constexpr bool std::operator<(const std::pair<_T1, _T2>&, const std::pair<_T1, _T2>&) operator<(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y) ^ /usr/include/c++/4.8/bits/stl_pair.h:220:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/4.8/algorithm:62:0, from user.cpp:3: /usr/include/c++/4.8/bits/stl_algo.h:5562:18: note: ‘Punct2D’ is not derived from ‘const std::pair<_T1, _T2>’ if (*__first2 < *__first1) ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:67:0, from /usr/include/c++/4.8/bits/char_traits.h:39, from /usr/include/c++/4.8/ios:40, from /usr/include/c++/4.8/ostream:38, from /usr/include/c++/4.8/iostream:39, from user.cpp:1: /usr/include/c++/4.8/bits/stl_iterator.h:297:5: note: template<class _Iterator> bool std::operator<(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_Iterator>&) operator<(const reverse_iterator<_Iterator>& __x, ^ /usr/include/c++/4.8/bits/stl_iterator.h:297:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/4.8/algorithm:62:0, from user.cpp:3: /usr/include/c++/4.8/bits/stl_algo.h:5562:18: note: ‘Punct2D’ is not derived from ‘const std::reverse_iterator<_Iterator>’ if (*__first2 < *__first1) ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:67:0, from /usr/include/c++/4.8/bits/char_traits.h:39,