Eroare de compilare: user.cpp:20:8: error: conflicting declaration ‘int g’ int n, g, i, sol, j; ^ user.cpp:15:10: error: ‘g’ has a previous declaration as ‘std::ofstream g’ ofstream g("rucsac.out"); ^ user.cpp: In function ‘int main()’: user.cpp:23:4: error: cannot bind ‘std::basic_istream<char>::__istream_type {aka std::basic_istream<char>}’ lvalue to ‘std::basic_istream<char>&&’ f >> n >> g; ^ In file included from /usr/include/c++/4.8/fstream:38:0, from user.cpp:4: /usr/include/c++/4.8/istream:872:5: error: initializing argument 1 of ‘std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&&, _Tp&) [with _CharT = char; _Traits = std::char_traits<char>; _Tp = std::basic_ofstream<char>]’ operator>>(basic_istream<_CharT, _Traits>&& __is, _Tp& __x) ^ user.cpp:29:18: error: no match for ‘operator-’ (operand types are ‘std::ofstream {aka std::basic_ofstream<char>}’ and ‘int’) for (j=g-w[i]; j>=0; j--) ^ user.cpp:29:18: note: candidates are: 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:4: /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:29:22: note: ‘std::ofstream {aka std::basic_ofstream<char>}’ is not derived from ‘const std::reverse_iterator<_Iterator>’ for (j=g-w[i]; j>=0; j--) ^ 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:4: /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:29:22: note: ‘std::ofstream {aka std::basic_ofstream<char>}’ is not derived from ‘const std::reverse_iterator<_Iterator>’ for (j=g-w[i]; j>=0; j--) ^ 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,