//: C09:Duplicate.cpp
// From "Thinking in C++, Volume 2", by Bruce Eckel & Chuck Allison.
// (c) 1995-2004 MindView, Inc. All Rights Reserved.
// See source code use permissions stated in the file 'License.txt',
// distributed with the code package available at www.MindView.net.
// Shows duplicate subobjects.
#include <iostream>
using namespace std;

class Top {
  int x;
public:
  Top(int n) { x = n; }
};

class Left : public Top {
  int y;
public:
  Left(int m, int n) : Top(m) { y = n; }
};

class Right : public Top {
  int z;
public:
  Right(int m, int n) : Top(m) { z = n; }
};

class Bottom : public Left, public Right {
  int w;
public:
  Bottom(int i, int j, int k, int m)
  : Left(i, k), Right(j, k) { w = m; }
};

int main() {
  Bottom b(1, 2, 3, 4);
  cout << sizeof b << endl; // 20
} ///:~