I'm using 2 integer numbers X and Y.
I would like to replace there values(Y=X, X=Y) but without using any other
variables or functions.
Hrcko
19  1448 
On Oct 3, 10:22 am, "Hrvoje Voda" <hrvoje.vo...@z g.htnet.hrwrote :
I'm using 2 integer numbers X and Y.
I would like to replace there values(Y=X, X=Y) but without using any other
variables or functions.
There's a very hacky way of doing it, but using a temporary variable
would certainly be simpler and more readable.
Can I ask *why* you don't want to use any other variables or methods?
Jon
Because it's a test question that I have to solve for a job.
Hrcko
"Jon Skeet [C# MVP]" <sk***@pobox.co mwrote in message
news:11******** **************@ d55g2000hsg.goo glegroups.com.. .
On Oct 3, 10:22 am, "Hrvoje Voda" <hrvoje.vo...@z g.htnet.hrwrote :
>I'm using 2 integer numbers X and Y.
I would like to replace there values(Y=X, X=Y) but without using any
other
variables or functions.
There's a very hacky way of doing it, but using a temporary variable
would certainly be simpler and more readable.
Can I ask *why* you don't want to use any other variables or methods?
Jon
x = x ^ y;
y = y ^ x;
x = x ^ y;
Graeme
"Doing his bit to rid the world of idiotic aha! interview questions"
"Hrvoje Voda" <hr**********@z g.htnet.hrwrote in message
news:fd******** **@ss408.t-com.hr...
Because it's a test question that I have to solve for a job.
Hrcko
"Jon Skeet [C# MVP]" <sk***@pobox.co mwrote in message
news:11******** **************@ d55g2000hsg.goo glegroups.com.. .
>On Oct 3, 10:22 am, "Hrvoje Voda" <hrvoje.vo...@z g.htnet.hrwrote :
>>I'm using 2 integer numbers X and Y.
I would like to replace there values(Y=X, X=Y) but without using any
other
variables or functions.
There's a very hacky way of doing it, but using a temporary variable
would certainly be simpler and more readable.
Can I ask *why* you don't want to use any other variables or methods?
Jon
On Oct 3, 11:04 am, "Hrvoje Voda" <hrvoje.vo...@z g.htnet.hrwrote :
Because it's a test question that I have to solve for a job.
Does your potential employer know that you're asking for help online?
Are they comfortable with that?
Jon
On 3 , 12:22, "Hrvoje Voda" <hrvoje.vo...@z g.htnet.hrwrote :
I'm using 2 integer numbers X and Y.
I would like to replace there values(Y=X, X=Y) but without using any other
variables or functions.
Hrcko
You may use System.Threadin g.Interlocked to do it:
int var1 = 5;
int var2 = 10;
var1 = System.Threadin g.Interlocked.E xchange(ref var2, var1);
But, maybe, you are tested not on knowing of hacks but on ability to
write understandable code? :)
Regards,
Mykola http://marss.co.ua
"marss" <ma******@gmail .comwrote in message
news:11******** *************@w 3g2000hsg.googl egroups.com...
>
You may use System.Threadin g.Interlocked to do it:
int var1 = 5;
int var2 = 10;
var1 = System.Threadin g.Interlocked.E xchange(ref var2, var1);
LOL!
Excellent solution.
Playing around with bits are sooo oldschool :)
- Michael Starberg
Michael S wrote:
"marss" <ma******@gmail .comwrote in message
news:11******** *************@w 3g2000hsg.googl egroups.com...
>You may use System.Threadin g.Interlocked to do it:
int var1 = 5;
int var2 = 10;
var1 = System.Threadin g.Interlocked.E xchange(ref var2, var1);
LOL!
Excellent solution.
Playing around with bits are sooo oldschool :)
- Michael Starberg
You don't have to play around with bits. It works just fine with
addition and subtraction:
var1 -= var2
var2 += var1
var1 = var2 - var1
--
Göran Andersson
_____ http://www.guffa.com
On 3 , 19:27, Göran Andersson <gu...@guffa.co mwrote:
You don't have to play around with bits. It works just fine with
addition and subtraction:
var1 -= var2
var2 += var1
var1 = var2 - var1
Not so reliable as Graeme's solution. What about stack overflow? :)
Regards,
Mykola http://marss.co.ua
marss <ma******@gmail .comwrote:
On 3 , 19:27, Göran Andersson <gu...@guffa.co mwrote:
You don't have to play around with bits. It works just fine with
addition and subtraction:
var1 -= var2
var2 += var1
var1 = var2 - var1
Not so reliable as Graeme's solution. What about stack overflow? :)
I can't see how the stack would overflow. You might get *numeric*
overflow, but that would just wrap round - shouldn't be a problem.
--
Jon Skeet - <sk***@pobox.co m> http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
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