¿Como funciona el swap en c++?

Question

funcionamiento de método swap

Answer 1

// using temp variable
void swap (int *x , int *y)
{
temp= *x;
*x = *y;
*y = temp;
}

// without using extra temp. variable
void swap (int *x , int *y)
{
*x = (*x) ^ (*y);
*y = (*x) ^ (*y);
*x = (*x) ^ (*y);
}

void swap (int *x , int *y)
{
*x = (*x) + (*y);
*y = (*x) - (*y);
*x = (*x) - (*y);
}

void swap (int *x , int *y)
{
*x = (*x) * (*y);
*y = (*x) / (*y);
*x = (*x) / (*y);
}

void swap (int *x , int *y)
{
*x = (*x + *y) - (*y= *x);
}

Answer 2

thank you so much