[troxy]

Do you know why you have slightly different numbers of (){}[] characters? In C or C++ shouldn't those all be paired up to match?

[zeteo]

It can probably be accounted for by comments (e.g. people sometimes comment out half a block). Although the comments should be left out, so as not to mix the C and the English.

[alextgordon]

Also string and character literals. It's common to write something like

    if (c == '{')

and not need to test for the matching one.