// B3.cpp - initializing constant and reference members
//
//  constructors must initialize reference and constant members using
//  initialization sequences.  This is so because references and const
//  data members cannot be reset once they are constructed, even in the
//  constructor body for class X.
//
#include <iostream>
#include <sstream>
using namespace std;

class X {
  public:
    X(istream &input, int size) : in(input), _size(size) { }
    X(const X &x) : in(x.in), _size(x._size) { }
    void getInput() {
      char byte;
      int count = 0;
      while(count++ < _size && in.good()) {
        in.get(byte);
        cout << byte;
      }
      cout << "\n\n";
    }
  private:
    istream &in;
    const int _size;
};

void main() {

  istringstream input(
    "\n  programmers are like playwrights and all computers are bad actors"
  );
  X x(input,35);
  cout << "\n  x: ";
  x.getInput();
  X y = x;
  cout << "\n  y: ";
  y.getInput();
}