foo.cc:25:9: error: expected unqualified-id before ‘for’
   25 |         for(int i=1;i<=n;i++)
      |         ^~~
foo.cc:25:21: error: ‘i’ does not name a type
   25 |         for(int i=1;i<=n;i++)
      |                     ^
foo.cc:25:26: error: ‘i’ does not name a type
   25 |         for(int i=1;i<=n;i++)
      |                          ^
foo.cc:29:9: error: expected unqualified-id before ‘return’
   29 |         return 0;
      |         ^~~~~~
foo.cc:30:1: error: expected declaration before ‘}’ token
   30 | }
      | ^