Can photos be saved?

So i took pictures on my NIkon D40 without a memory card in how can i get the pictures on to my computer? Do not have usb cable either.

You can't, there's no internal memory on any DSLR I've come across, you have to have a card in it, I'm surprised the camera allowed you to take a picture.

There are no pictures to transfer.
You MUST have a card in to record the images.

You Can't Upload Pictures to The Computer without the USB Cable the only other thing i can think of is if you can plug in your memory card into the computer than that would be the only other way

The photos are gone, they weren't saved at all when you took them.

That's why you should keep the shutter release lock activated in the menu. It's entry #06 on the full menu.