#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 x, int y)
{
int temp;
cout << "Swap. Before swap, x: " << x << " y: " << y << endl;
temp = x;
x = y;
y = temp;
cout << "Swap. After swap, x: " << x << " y: " << y << endl;
}