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September 24th, 2010, 02:09 AM
#9
Re: Is there any difference between using {} and not using them?
 Originally Posted by laserlight
There is a difference in scope and thus lifetime due to the use of RAII. I think dshawul already explained the idea: to release a resource - that may have a non-negligible cost to keep around - when it is no longer in use. In a way, it is akin to the idea of a scoped lock.
Well, yeah. But he was making it sound like it was a bad thing to do.
Is your question related to IO?
Read this C++ FAQ article at parashift by Marshall Cline. In particular points 1-6.
It will explain how to correctly deal with IO, how to validate input, and why you shouldn't count on "while(!in.eof())". And it always makes for excellent reading.
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