Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:160:19: warning: unused variable ‘j’ [-Wunused-variable] int n,q,i,x,y,j; ^ In file included from /usr/include/c++/4.8/bits/stl_pair.h:59:0, from /usr/include/c++/4.8/bits/stl_algobase.h:64, 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/sstream:38, from /usr/include/c++/4.8/complex:45, from /usr/include/c++/4.8/ccomplex:38, from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:52, from user.cpp:1: /usr/include/c++/4.8/bits/move.h: In instantiation of ‘void std::swap(_Tp&, _Tp&) [with _Tp = const int]’: user.cpp:153:20: required from here /usr/include/c++/4.8/bits/move.h:176:11: error: assignment of read-only reference ‘__a’ __a = _GLIBCXX_MOVE(__b); ^ /usr/include/c++/4.8/bits/move.h:177:11: error: assignment of read-only reference ‘__b’ __b = _GLIBCXX_MOVE(__tmp); ^ user.cpp: In member function ‘char Parsare::read_ch()’: user.cpp:19:40: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, NRCHAR, fin); ^