my camera doesn't work on my iphone 5

There are various Camera issues, so a little more about your specific problem may help someone provide insight.

FIX FOR REAR CAMERA AND FLASHLIGHT!!!

I also had the same flash and rear camera problems as everyone else but I figured it was a software problem.

To fix the flash/flashlight, simply download the flashlight app. The one everyone used before iOS 7. The flash should work immediately.

To fix the rear camera go to Settings > General > Restrictions. Enable restrictions and turn the Camera off, then take the restriction off. Check your camera, it should work immediately.

Hope this answers a lot of questions and saves a bunch of money due to Apple's failures.

Cheers,

Tim