<human>: Provide a brief overview of the text.

Today I had a university exam which lasted for four hours. Before the papers were handed out, the girl next to me asked if I could help her if there were some questions she didn't know. I said no, it's an exam. During the second part (more difficult) she asked to see my answers for a certain question and tried to copy what I was writing. It wasn't possible to switch sweats so I moved my arm forward to try and block her view. 

I didn't think this was right, so when I turned it in to the teacher, I told him that she had tried to copy my answers. He asked if I let her and I said no. 

In my mind it wasn't wrong to tell him because she did try to cheat. But someone I mentioned it to in passing said I shouldn't have told the teacher. They think it was a wrong/crappy attitude to have told on her, and it should be none of my business whether she cheats or not, and maybe it's not a subject that interests her and she's just trying to pass for the credit; so it would be bad of me to cause her to fail (??) because it's just an exam?

Basically they think that I shouldn't care about her grade, and she will know herself that she didn't do the work / learn the material and it will be on her conscience that she had to cheat to pass, and it's not up to me to screw her over by telling the teacher. 

I think it's wrong by principle, and if she really just "trying to pass", the exam is not so hard and a passing grade is definitely possible if you've just showed up to classes and listened to the teacher. 

I don't know what the teacher will do; I don't think he will do much, since I don't think she saw anything of my answers in the end, so her answers will be what she was able to put down. Is there a chance he'll deduct my grade for telling on her? Should I feel guilty?
<bot>: Person tried to cheat off my exam paper, so I told the teacher at the end that she had attempted to, though she was unsuccessful. Was it wrong of me?