Eroare de compilare: user.cpp: In function ‘int euler(int, std::vector<int>&)’: user.cpp:66:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < div.size(); i++) ^ user.cpp:69:51: error: no match for ‘operator-’ (operand types are ‘Fractie’ and ‘Fractie’) rezultat = rezultat * (Fractie(div[i], div[i]) - Fractie(1, div[i])); ^ user.cpp:69:51: note: candidates are: user.cpp:47:10: note: Fractie Fractie::operator-(Fractie&) Fractie operator-(Fractie &f2) ^ user.cpp:47:10: note: no known conversion for argument 1 from ‘Fractie’ to ‘Fractie&’ 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/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:6: /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:69:70: note: ‘Fractie’ is not derived from ‘const std::reverse_iterator<_Iterator>’ rezultat = rezultat * (Fractie(div[i], div[i]) - Fractie(1, div[i])); ^ 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/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:6: /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:69:70: note: ‘Fractie’ is not derived from ‘const std::reverse_iterator<_Iterator>’ rezultat = rezultat * (Fractie(div[i], div[i]) - Fractie(1, div[i])); ^ 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/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:6: /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:69:70: note: ‘Fractie’ is not derived from ‘const std::move_iterator<_Iterator>’ rezultat = rezultat * (Fractie(div[i], div[i]) - Fractie(1, div[i]));