//diamond.cpp
//investigates diamond-shaped multiple inheritance
#include <iostream>
using namespace std;
////////////////////////////////////////////////////////////////
class A
   {
   public:
      virtual void func(); 
   };
class B : public A
   {  };
class C : public A
   {  };
class D : public B, public C
   {  };
////////////////////////////////////////////////////////////////
int main()
   {
   D objD;
   objD.func();  //ambiguous: won't compile
   return 0;
   }