Eroare de compilare: user.cpp: In function ‘void nou(int, int, int, int, std::vector<std::pair<int, int> >&, std::vector<std::pair<int, int> >&)’: user.cpp:10:16: error: ‘a’ was not declared in this scope for(auto i:a) ^ user.cpp:12:43: error: no matching function for call to ‘std::vector<std::pair<int, int> >::push_back(<brace-enclosed initializer list>)’ v2.push_back({i.first,i.second}); ^ In file included from /usr/include/c++/6/vector:64:0, from user.cpp:2: /usr/include/c++/6/bits/stl_vector.h:914:7: note: candidate: void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = std::pair<int, int>; _Alloc = std::allocator<std::pair<int, int> >; std::vector<_Tp, _Alloc>::value_type = std::pair<int, int>] push_back(const value_type& __x) ^~~~~~~~~ /usr/include/c++/6/bits/stl_vector.h:914:7: note: no known conversion for argument 1 from ‘<brace-enclosed initializer list>’ to ‘const value_type& {aka const std::pair<int, int>&}’ /usr/include/c++/6/bits/stl_vector.h:932:7: note: candidate: void std::vector<_Tp, _Alloc>::push_back(std::vector<_Tp, _Alloc>::value_type&&) [with _Tp = std::pair<int, int>; _Alloc = std::allocator<std::pair<int, int> >; std::vector<_Tp, _Alloc>::value_type = std::pair<int, int>] push_back(value_type&& __x) ^~~~~~~~~ /usr/include/c++/6/bits/stl_vector.h:932:7: note: no known conversion for argument 1 from ‘<brace-enclosed initializer list>’ to ‘std::vector<std::pair<int, int> >::value_type&& {aka std::pair<int, int>&&}’