Eroare de compilare: user.cpp: In function ‘solutie euclid_extins(int, int, int)’: user.cpp:49:21: error: no match for ‘operator-’ (operand types are ‘comb_lin’ and ‘comb_lin’) r = a%b; Vr = Va - q*Vb; ^ user.cpp:49:21: note: candidates are: user.cpp:19:11: note: comb_lin comb_lin::operator-(comb_lin&) comb_lin operator-(comb_lin &x) ^ user.cpp:19:11: note: no known conversion for argument 1 from ‘comb_lin’ to ‘comb_lin&’ 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:327:5: note: template<class _Iterator> typename std::reverse_iterator<_Iterator>::difference_type 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:327:5: note: template argument deduction/substitution failed: user.cpp:49:25: note: ‘comb_lin’ is not derived from ‘const std::reverse_iterator<_Iterator>’ r = a%b; Vr = Va - q*Vb; ^ 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:379:5: note: template<class _IteratorL, class _IteratorR> decltype ((__y.base() - __x.base())) std::operator-(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_IteratorR>&) operator-(const reverse_iterator<_IteratorL>& __x, ^ /usr/include/c++/4.8/bits/stl_iterator.h:379:5: note: template argument deduction/substitution failed: user.cpp:49:25: note: ‘comb_lin’ is not derived from ‘const std::reverse_iterator<_Iterator>’ r = a%b; Vr = Va - q*Vb; ^ 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:1104:5: note: template<class _IteratorL, class _IteratorR> decltype ((__x.base() - __y.base())) std::operator-(const std::move_iterator<_Iterator>&, const std::move_iterator<_IteratorR>&) operator-(const move_iterator<_IteratorL>& __x, ^ /usr/include/c++/4.8/bits/stl_iterator.h:1104:5: note: template argument deduction/substitution failed: user.cpp:49:25: note: ‘comb_lin’ is not derived from ‘const std::move_iterator<_Iterator>’ r = a%b; Vr = Va - q*Vb; ^ 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,