/in/foo.cc:4:5: error: expected initializer before 'if'
     if (n == 1)
     ^~
/in/foo.cc:6:5: error: expected unqualified-id before 'else'
     else if (n == 2)
     ^~~~
/in/foo.cc:8:5: error: expected unqualified-id before 'else'
     else
     ^~~~
/in/foo.cc:10:1: error: expected declaration before '}' token
 }
 ^