#include
using namespace std;
void swap(int *x, int *y);
int main(){
int x = 5, y = 10;
cout << "Main. Before swap, x: " << x << " y: " << y << endl;
swap(&x,&y);
cout << "Main. After swap, x: " << x << " y: " << y << endl;
return 0;
}
void swap (int *px, int *py)
{
int temp;
cout << "Swap. Before swap, *px: " << *px << " *py: " << *py << endl;
temp = *px;
*px = *py;
*py = temp;
cout << "Swap. After swap, *px: " << *px << " *py: " << *py << endl;
}