Default Why Simple Calculator not running?

I tried running the following tutorial for designing a basic calculator:

I copied and pasted everything,but it didn't work!I've run it on a real device and it gave me:"The application has stopped unexpectedly",while on emulator nothing appeared at all! Here's the Logcat when running on a real deviceSee attachments)

I am using Eclipse Luna,and installed latest SDK Tools(As far as I know)!
Attached Images
File Type: jpg logcat1.jpg - [Click for QR Code] (196.5 KB, 23 views)