Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:21:18: error: no match for ‘operator=’ (operand types are ‘std::ifstream {aka std::basic_ifstream<char>}’ and ‘int’) for(in=1;in<=x;in++)//testam daca ajunge langa alt cartier * ^ user.cpp:21:18: note: candidate is: In file included from user.cpp:1:0: /usr/include/c++/4.8/fstream:427:11: note: std::basic_ifstream<char>& std::basic_ifstream<char>::operator=(const std::basic_ifstream<char>&) <deleted> class basic_ifstream : public basic_istream<_CharT, _Traits> ^ /usr/include/c++/4.8/fstream:427:11: note: no known conversion for argument 1 from ‘int’ to ‘const std::basic_ifstream<char>&’ user.cpp:21:23: error: no match for ‘operator<=’ (operand types are ‘std::ifstream {aka std::basic_ifstream<char>}’ and ‘int’) for(in=1;in<=x;in++)//testam daca ajunge langa alt cartier * ^ user.cpp:21:23: 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/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: /usr/include/c++/4.8/bits/stl_pair.h:239:5: 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:239:5: note: template argument deduction/substitution failed: user.cpp:21:25: note: ‘std::ifstream {aka std::basic_ifstream<char>}’ is not derived from ‘const std::pair<_T1, _T2>’ for(in=1;in<=x;in++)//testam daca ajunge langa alt cartier * ^ 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:1: /usr/include/c++/4.8/bits/stl_iterator.h:315:5: 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:315:5: note: template argument deduction/substitution failed: user.cpp:21:25: note: ‘std::ifstream {aka std::basic_ifstream<char>}’ is not derived from ‘const std::reverse_iterator<_Iterator>’ for(in=1;in<=x;in++)//testam daca ajunge langa alt cartier * ^ 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:1: /usr/include/c++/4.8/bits/stl_iterator.h:365:5: note: template<class _IteratorL, class _IteratorR> bool 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:365:5: note: template argument deduction/substitution failed: