#include <iostream>   

using namespace std;

void doStuff(int par1Value, int& par2Ref);


int main()
{
  int n1,n2;

  n1 = 1;
  n2 = 2;

  doStuff(n1, n2);
  cout << "n1 after function call = " << n1 << endl;
  cout << "n2 after function call = " << n2 << endl;


  return 0;
}

void doStuff(int par1Value, int& par2Ref){
  cout << par1Value << endl;
  par1Value = 111;
  cout << "par1Value in function call = "
       << par1Value << endl;

  cout << par2Ref << endl;
  par2Ref = 222;
  cout << "par2Ref in function call = "
       << par2Ref << endl;


}