/in/foo.c: In function 'main':
/in/foo.c:9:6: error: 'i' undeclared (first use in this function)
  for(i=1;i<n;i++)
      ^
/in/foo.c:9:6: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:13:2: error: expected ';' before '}' token
  }
  ^