// A5.cpp - Can you find problems with this code?

#include <iostream>
using namespace std;

class X { 
  public:
    X() : val(-3) { };               // creates X object { -3 }
    X(int i) : val(i) { }
    void mf() { cout << "\n  mf() - value = " << val; }
  private:
    int val;
}; 


class Y : public X {
  public:
    Y() : X(), val(5), dbl(3.5) { }  // creates Y object { { -3 }, 5, 3.5 }
    Y(int d, int i) : X(), dbl(d), val(i) { }
  private:
    double dbl;
    int val;
}; 

/////////////////////////////////////////////////////////////////
// This function only works correctly for arrays of base types
// You could correct the function by passing an array of base
// class pointers to objects, rather than an array of objects.
// This, however would change the signature of aFunction to
//    aFunction(X **x)

void aFunction(X *x) { x[1].mf(); }

void main() {

  X x[2];         // creates { -3 }{ -3 }
  aFunction(x);

  Y y[2];         // creates { { -3 }, 5, 3.5 }{ { -3 }, 5, 3.5 }
  aFunction(y);

  cout << "\n\n";
}