A question about swap

I hope this question doesn't appear twice. I tried posting it once,
however, I got a stupid 505 internal error on google. When this
happens, the post will either post 30 minutes later or won't post at
all.

Given

void swap(int *x, int *y)
{
int temp;

temp = *x;
*x = *y;
*y = temp;
}

How does having a temp variable allow for anything to safely swap with
itself? Say x = 10 and y = 10. What would happen in the absence of
temp?

Chad

Chad wrote:
I hope this question doesn't appear twice. I tried posting it once,
however, I got a stupid 505 internal error on google. When this
happens, the post will either post 30 minutes later or won't post at
all.
>
Given
>
void swap(int *x, int *y)
{
int temp;
>
temp = *x;
*x = *y;
*y = temp;
}
>
How does having a temp variable allow for anything to safely swap with
itself? Say x = 10 and y = 10. What would happen in the absence of
temp?
>
Try writing the function without it and see what you get.

--
Ian Collins.