//  A1_10.cpp

#include <iostream>
using namespace std;

//  This is what is required if X, Y, and Z are not related to C

class X { public: X() { cout << "\n  constructing X with no arguments"; } };
class Y { public: Y() { cout << "\n  constructing Y with no arguments"; } };
class Z { public: Z() { cout << "\n  constructing Z with no arguments"; } };

class C {
  public:
    C(const X &x) { cout << "\n  promoting X object to C"; }
    C(const Y &x) { cout << "\n  promoting Y object to C"; }
    C(const Z &x) { cout << "\n  promoting Z object to C"; }
};

/*  This is what is required if X, Y, and Z inherit from C
class C {
  public:
    C() { cout << "\n  constructing C with no arguments"; }
    C(const C &c) { cout << "\n  copying C object"; }
 };

class X : public C { 
  public: X() { cout << "\n  constructing X with no arguments"; } 
};
class Y : public C { 
  public: Y() { cout << "\n  constructing Y with no arguments"; }
};
class Z : public C { 
  public: Z() { cout << "\n  constructing Z with no arguments"; }
};
*/
void main() {

  C c[3] = { X(), Y(), Z() };

  cout << "\n\n";
}