just a small doubt.....
if x=10 and y=20
thn  wht wud b the value of (x ^ y)?
acc to me....it has to be 1 bt if the value is 1 , thn how wud the method
using XOR operations work?.....plz xplain


On Mon, Jun 13, 2011 at 3:18 AM, KK <kunalkapadi...@gmail.com> wrote:

> @kunal
> Actually its not same value its the same variable and it arises only
> if u code the given way(and some people do it this way)....
>
> void swap(int &a, int &b)
> {
>         a ^= b ^= a ^= b;
> }
>
> now we have
> int a = 10;
>
> swap(a, a)
>
> This will set a's value to 0...and this happens while sorting arrays
> when u pass the same index values...
> Conclusion:  Either code as given in above Q or use the temporary
> var...
>
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