foo.cc: In function ‘int main()’:
foo.cc:11:17: error: expected ‘}’ before ‘else’
   11 |                 else
      |                 ^~~~
foo.cc:9:9: note: to match this ‘{’
    9 |         {
      |         ^
foo.cc: At global scope:
foo.cc:14:9: error: expected unqualified-id before ‘return’
   14 |         return 0;
      |         ^~~~~~
foo.cc:15:1: error: expected declaration before ‘}’ token
   15 | }
      | ^