/in/foo.cc: In function 'int main()':
/in/foo.cc:7:2: error: 'cin' was not declared in this scope
  cin>>x>>y>>z;
  ^~~
/in/foo.cc:7:2: note: suggested alternative: 'main'
  cin>>x>>y>>z;
  ^~~
  main
/in/foo.cc:9:3: error: 'cout' was not declared in this scope
   cout<<x;
   ^~~~
/in/foo.cc:11:3: error: 'cout' was not declared in this scope
   cout<<y;
   ^~~~
/in/foo.cc:13:3: error: 'cout' was not declared in this scope
   cout<<z;
   ^~~~