[anon4]

just fucking use

  for(i = 0; i < length; i++)
    .. do something with (length - i - 1) ..

I've been much happier since I started writing all loops as incrementing loops.

[cbsmith]

    for (i = 0; i <= length; i++)
        .. boy I sure hope length is not a max value ..

It's not about the incrementing vs. decrementing so much as the equality bounded loop on a value that could be a min/max value. Gets you every time.