Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:154:24: warning: left operand of comma operator has no effect [-Wunused-value] nr_mare rasp=((b,n-1)-din[n-1])*b; ^ user.cpp:154:26: error: no match for ‘operator-’ (operand types are ‘long long int’ and ‘nr_mare’) nr_mare rasp=((b,n-1)-din[n-1])*b; ^ user.cpp:154:26: note: candidates are: In file included from /usr/local/include/c++/4.8.0/bits/stl_algobase.h:67:0, from /usr/local/include/c++/4.8.0/bits/char_traits.h:39, from /usr/local/include/c++/4.8.0/ios:40, from /usr/local/include/c++/4.8.0/istream:38, from /usr/local/include/c++/4.8.0/fstream:38, from user.cpp:1: /usr/local/include/c++/4.8.0/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/local/include/c++/4.8.0/bits/stl_iterator.h:327:5: note: template argument deduction/substitution failed: user.cpp:154:34: note: mismatched types ‘const std::reverse_iterator<_Iterator>’ and ‘long long int’ nr_mare rasp=((b,n-1)-din[n-1])*b; ^ In file included from /usr/local/include/c++/4.8.0/bits/stl_algobase.h:67:0, from /usr/local/include/c++/4.8.0/bits/char_traits.h:39, from /usr/local/include/c++/4.8.0/ios:40, from /usr/local/include/c++/4.8.0/istream:38, from /usr/local/include/c++/4.8.0/fstream:38, from user.cpp:1: /usr/local/include/c++/4.8.0/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/local/include/c++/4.8.0/bits/stl_iterator.h:379:5: note: template argument deduction/substitution failed: user.cpp:154:34: note: mismatched types ‘const std::reverse_iterator<_Iterator>’ and ‘long long int’ nr_mare rasp=((b,n-1)-din[n-1])*b; ^ In file included from /usr/local/include/c++/4.8.0/bits/stl_algobase.h:67:0, from /usr/local/include/c++/4.8.0/bits/char_traits.h:39, from /usr/local/include/c++/4.8.0/ios:40, from /usr/local/include/c++/4.8.0/istream:38, from /usr/local/include/c++/4.8.0/fstream:38, from user.cpp:1: /usr/local/include/c++/4.8.0/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/local/include/c++/4.8.0/bits/stl_iterator.h:1104:5: note: template argument deduction/substitution failed: user.cpp:154:34: note: mismatched types ‘const std::move_iterator<_Iterator>’ and ‘long long int’ nr_mare rasp=((b,n-1)-din[n-1])*b; ^ In file included from /usr/local/include/c++/4.8.0/bits/stl_algobase.h:67:0, from /usr/local/include/c++/4.8.0/bits/char_traits.h:39, from /usr/local/include/c++/4.8.0/ios:40,