/in/foo.cc: In function 'int main()':
/in/foo.cc:7:13: error: 'aaa' was not declared in this scope
  cout<<" "<<aaa<<" "<<"\n";
             ^~~
/in/foo.cc:8:12: error: 'aaaaa' was not declared in this scope
  cout<<""<<aaaaa<<""<<"\n";
            ^~~~~