Type C : Toilets with the silver button on top - Now, depending on the toilet you will either lift up on the silver button or just push down.
Type D : Train toilets - Okay, the bathrooms on the trains are kind of weird. It almost looks like a space cubicle or something just sitting in a random corner. It has buttons to open/close the door as well as flush the toilet. Sometimes the buttons don't like to work, which is always a lovely occasion. Basically just keep pressing random buttons until it does what you want.
|gotta love Google images|
|it's a little more confusing when the buttons aren't in English|