#include <iostream.h>

void  scambio(int *x, int *y  ) {
    int temp;  
    temp = *x; *x = *y; *y =temp;
}


int main() {
  int a,b;
  a = 1; b=2;
  cout << a  << b << endl;
  scambio(&a,&b);
  cout << a  << b << endl;
  return 0;
}