Eroare de compilare: main.cpp: In function 'int main()': main.cpp:14:10: error: invalid use of non-static member function 'std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::flush() [with _CharT = char; _Traits = std::char_traits<char>]' cout.flush; ~~~~~^~~~~ In file included from /usr/include/c++/6/ostream:638:0, from /usr/include/c++/6/istream:39, from /usr/include/c++/6/sstream:38, from /usr/include/c++/6/complex:45, from /usr/include/c++/6/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52, from main.cpp:1: /usr/include/c++/6/bits/ostream.tcc:210:5: note: declared here basic_ostream<_CharT, _Traits>:: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:8:11: warning: unused variable 'i' [-Wunused-variable] int n,i,j; ^ main.cpp:8:13: warning: unused variable 'j' [-Wunused-variable] int n,i,j; ^ Non zero exit status: 1