#include
using namespace std;
void swap(int &x, int &y);
int main()
{
int i, j;
i = 10;
j = 20;
cout << "Initial values of i and j: ";
cout << i << ' ' << j << '\n';
swap(j, i);
cout << "Swapped values of i and j: ";
cout << i << ' ' << j << '\n';
return 0;
}
void swap(int &x, int &y)
{
int temp;
temp = x;
x = y;
y = temp;
}
Initial values of i and j: 10 20
Swapped values of i and j: 20 10