Pre-increment and post-increment : achieve "almost" the same end result with a little difference. It is always adviced to use the pre-increment form in expressions where you do not care what value the expression ought to use - the new incremented one or the older value prior to increment. Also when it matters, if you need the former then use the pre-increment form and if the latter use the post-increment form. That is the basic difference.
The post increment form has a drawback of generating a temporary (yeah, that can be optimized by the optimizer but still).
To understand the difference and when to use which form, you may find this Codeguru FAQ entry quite helping : C++ Operator: Why should I use '++i' instead of 'i++'?
Have fun!
Saturday, April 14, 2007
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2 comments:
"in expressions where you do not care what value the expression ought to use - the new incremented one or the older value prior to increment."
Not to be a pain, but if you don't care then you shouldn't use either... You should always care (and be aware) of what you're doing and what is necessary.
BTW, nice site ;)
@Petter : Thank you very much, Petter, for the visit. :) And your comments are never a pain. I have learnt a lot from you. Stay within reach. Cheers! :)
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