foo.cc:2:2: error: expected unqualified-id before '{' token
  {
  ^
foo.cc:8:2: error: expected unqualified-id before 'if'
  if(a<b)
  ^~
foo.cc:10:2: error: expected unqualified-id before 'return'
  return 0;
  ^~~~~~
foo.cc:11:1: error: expected declaration before '}' token
 }
 ^