// Calling a function by value and reference parameters

#include<iostream.h>
// Note x is passed by value and y is passed by reference
void ChangeChar ( char char1, char &char2)
{
  ++char1;    // increment the call by value parameter
  ++char2;    // increment the call by reference parameter
  return;
}

int main()
{
  char x, y;
  cout << "Enter two characters: ";
  cin >> x >> y;

  ChangeChar (x, y);
  cout << "The call by value of x is: " << x << endl;
  cout << "The call by reference of y is: " << y << endl;
  return 0;
}