foo.cc: In function ‘int main()’:
foo.cc:19:27: error: ‘endl’ was not declared in this scope; did you mean ‘std::endl’?
   19 |     std::cout << count << endl;
      |                           ^~~~
      |                           std::endl
In file included from iostream:41:
/nix/gcc-14-20241116/include/c++/14-20241116/ostream:741:5: note: ‘std::endl’ declared here
  741 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~