6.10.5. Miscellaneous (optional)

Inaccessible code [Inaccessible: 1-2 points] (optional)

Do not have code that can never be executed. For example, if you write
  return n;
  printf("%i", n);
the printf statement can never be performed.

A, B [Comma: 1-3 points] (optional)

Do not use the comma operator for sequenced evaluation of expressions.

Goto [Goto: 1-15 points] (optional)

Do not use gotos.