As mentioned, Canon lenses use electronic connections, so the aperture would not work. Also the lens to sensor distance is less for Canon cameras, so you cannot even use an adaptor to use the lens wide open.
The converse is true, as you can use Nikon lenses on a Canon camera, with an adaptor, but the aperture is manual. This only applies to non-G lenses which have an aperture ring.
Anyway, why on Earth would you want to soil your lovely Nikon with those nasty Canon lenses?
