#include <iostream>;
using namespace std;


int main()
{
  int firstvalue , secondvalue;
  int * mypointer;
   
  mypointer = &firstvalue;  //indirizzo di firstvalue
  *mypointer = 10;  // assegno 10 al valore puntato da mypointer (anche firstvalue e' 10)

  mypointer = &secondvalue;  // indirizzo di secondvalue
  *mypointer = 20; 
  cout<< "firstvalue = "<< firstvalue << ", secondvalue = "<<secondvalue<<endl;
  cout << "mypointer = " << mypointer << ",  &( *mypointer ) = " << &( *mypointer ) <<endl;
  return 0;
}