/in/foo.cc: In function 'int main()':
/in/foo.cc:5:2: error: 'cin' was not declared in this scope
  cin>>x;
  ^~~
/in/foo.cc:8:3: error: 'cout' was not declared in this scope
   cout<<" ";
   ^~~~
/in/foo.cc:12:3: error: 'cout' was not declared in this scope
   cout<<"odd ";
   ^~~~