C++ Swapping Pointers

Question

I\'m working on a function to swap pointers and I can\'t figure out why this isn\'t working. When I print out r and s in the swap function the values are swapped, which lea

Answer 1

The line r=s is setting a copy of the pointer r to the copy of the pointer s.

Instead (if you do not want to use the std:swap) you need to do this

void swap(int *r, int *s)
{
    int tmp = *r;
    *r = *s;
    *s = tmp;
}