How do cats learn?

You have to be rough with your cat. If they misbehave you have to slap them. I know it feels terrible but after a while they stop and you can be their best friend again instead of their mother.

Another Answer:

An animal should NOT be hit. EVER. To stop a cat doing things it shouldn't, e.g. scratching furniture or urinating indoors, they can be sprayed with water (e.g. from a water pistol or vaporizer), or taken into a another room for a while.

If a cat is misbehaving, there is usually a reason (needs a better/bigger scratching post, litter tray is too dirty/doesn't like the litter/not enough trays around the house, or just wants attention, so will do the only thing it knows to get it). It is up to the owner to find out why the cat is behaving in a certain way, and strive to correct it in positive, non-violent ways.