Swap function (Using pointer)

#include <bits/stdc++.h>
using namespace std;
void swipe(int&x, int&y);
int main ()
{
    int a=10,b=20;
    swipe(a,b);
    cout << a << "\n" << b;

    return 0;
}

void swipe(int&x, int&y)
{
   int temp;
   temp = x;
   x = y;
   y = temp;

}