#include <iostream>

using namespace std;
void swap( int *, int *);

int main()
{
	int m = 10;
	int n = 20;

	cout << m << " " << n << endl;
	swap(&m, &n);

	cout << m << " " << n << endl;

	system("PAUSE");

}

void swap (int *m, int *n)
{
	int temp;

	temp = *n;

	*n = *m;

	*m = temp;
}