OJ Board

Hi All,

I searched through google but couldn't find an answer. My doubt is how to put the EOF mark in any place of a file. What I'm supposing seems like to put a NULL mark ('\0') in the middle of a string in order to "eliminate" all the others characters after it.

Example:
You have these data on a ...

yeah.. I know I should've searched in Google this, but I just don't want to buy a book in the "dark". The last time I did it was a disaster x.x

I just want some good books that teach C++ and/or Object-Oriented Programming, and I really think here is the best place to get some advices x)
I found one ...

Anyone who got Accepted in Programming challenges (http://www.programming-challenges.com) or that went through the same situation (Acc here but WA in PC) can help me?
I tested my program several times and I didn't find an error. Maybe it's because the programming-challenges judges are more severe (I ...