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Im writing a console application programme where the user has input 5 number which are loaded into an array list. Now after thios has happened the user selects one of 2 options. 1 is to sort them in an ascending order and 2; descending. can you help by showing me the code to sort the numbers in the array.
Thanx
Daniel
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Hi Daniel,
This sounds like homework to me so best I don't just give you the answer, better if I teach you to fish eh? 
Firstly, I'd say why are you using an arraylist if you know they are all going to be integers and you know how many there are? Best you use int[] and save the boxing and unboxing associated with an arraylist.
Once you have done that, Google how to sort an array of integers.
--
Cheers,
Gary
http://www.garyshort.org
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ha, thats funny!
no its not homework, practising for an exam next week, so going through some examples actually!
but since u wanna teach me to fish...
i actually dont remember why i chose to use an arraylist?! oh yes, it was so that i can use the readline() method to add the users input into the list. if u suggest that i use int[], how do i then add the users inputs as there is no add method?
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Get the user input first, then you know how big your array has to be then add the input in the normal way.
--
Cheers,
Gary
http://www.garyshort.org
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ye the prob is i havent done programming in a couple months so ive forgotten basics, so im not even sure how do that anymore, thats why i was looking for code so i can refresh my memory. thanx all the same though. will press on!
Dan
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Looks like you've got your work cut out if you are going to pass this exam. How long do you have to study for it?
--
Cheers,
Gary
http://www.garyshort.org
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this weekend, they made a mistake with my exam timetable and i was meant to have until wednesday next week, but after enquiring today i found that it is on monday. so having to cram some work in. Look it's not a hard exam, but my memory is dry as i havent done it in a couple months and have been focusing on hardware as it is part of the course i'm doing, so im just outta things you know, so trying to get my logic and problem solving skills up and going so i can hurt this exam!
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Ok, well if you can't remember how to assign variables to elements in an array I think you have a lot of work to do. Its going to be a long week-end for you.
--
Cheers,
Gary
http://www.garyshort.org
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ye shot, got it working now, used the int[], its storing them and getting them. just need to sort them now, have the method in place, just assigning them now. so its almost done
Thanx
Dan
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k all sorted now, sorting it perfectly. phew, that was stressful, wat a mission. cant believe it took me so long, im really rusty!
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Glad to have been of help!
--
Cheers,
Gary
http://www.garyshort.org
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what u people r doing i dont know..
this is a class room discusion or what..
sh*t...........
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Daniel_Logan wrote: no its not homework, practising for an exam next week
Same thing, isn't it?
---
"Anything that is in the world when you're born is normal and ordinary and is just a natural part of the way the world works. Anything that's invented between when you're fifteen and thirty-five is new and exciting and revolutionary and you can probably get a career in it. Anything invented after you're thirty-five is against the natural order of things."
-- Douglas Adams
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Ahoy there, Gary! (You were my TA in Patty Foutz's CS1070 class, Va Tech (Blacksburg), circa 1980!). How time flies! Trust you're well.
/ravi
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I'm very well thank you, but I'm afraid I as not your TA, I'm based in Scotland, UK
--
Cheers,
Gary
http://www.garyshort.org
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Sorry, I mistook you for someone with the same name who was my TA in 1980.
/ravi
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You had a "territorial army"? WOW!! (Actually, I assume TA stands for something else, but I don't know what it is)
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TA = Teaching Assistant
GTA = Graduate Teaching Assistant
RA = Research Assistant
GRA = Graduate Research Assistant
There was a guy named Gary Short who was the TA for my first CS course in '81. I was probably the only graduate student in the course. 
/ravi
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How can you know about technical details like boxing/unboxing without knowing List<int>?
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I'm afraid your quesetion does not make much sense. Boxing does not have anything to do with generics per se.
--
Cheers,
Gary
http://www.garyshort.org
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You might want to do a quick Google search.[^]
Generics allows creating general collection classes where no boxing/unboxing will take place when adding or accessing items.
The generic List collection is an example of such a collections (well, all of the supplied generic collections in .NET 2.0 are as far as I know, but the List is the replacement of the obsolete ArrayList originally mentioned).
Of course it is possible to create a list collection with int values where no boxing/unboxing is performed without using generics, but then the collection would have to be programmed specifically for the int type and could not be used for other value types (besides copy-paste-modify "code reuse" obviously).
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Thank you I knew that, but your original question still makes no sense. It still doesn't make sense after your posting here.
--
Cheers,
Gary
http://www.garyshort.org
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The suggestion was to replace the use of an ArrayList with an Array to avoid boxing/unboxig. Using List<int> instead of an Array of ints would give the same benefit without loosing the functionality of a collection.
The only reason I can see for suggesting an Array without even mentioning the List<T> collection is being unaware of the List<T> class - which (if you read through the forums and variuos internet postings) unfortunately is quite common. So I was a bit confused: How can someone understand enough about .NET to know about boxing/unboxing but not know about List<T>. The only logical explanation I can see is someone not aware of the .NET 2.0 features... but then .NET 2.0 isn't exactly new?
But never mind, I probably jumped to conclusion about the missing awareness of the generic classes - I simply went with the odds
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Ah I'm with you now. No, it's okay I know about .Net 2.0 and generics. I mentioned int[] because the OP didn't mention what version of .Net he was using so I went with the universal solution.
--
Cheers,
Gary
http://www.garyshort.org
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