foo.cc:6:2: error: expected initializer before 'int'
  int x;
  ^~~
foo.cc:7:2: error: 'cin' does not name a type
  cin>>x;
  ^~~
foo.cc:8:2: error: expected unqualified-id before 'if'
  if(0==x%2) 
  ^~
foo.cc:12:2: error: expected unqualified-id before 'else'
  else
  ^~~~
foo.cc:17:2: error: expected unqualified-id before 'return'
  return 0;
  ^~~~~~

[Hydro](https://hydro.ac)提供评测服务