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#include <stdio.h>
class A
{
public:
A () {}
virtual ~A() {}
virtual const char* aname () { return "A"; }
virtual const char* name () { return "A"; }
};
class B : public A
{
public:
B () {}
virtual ~B() {}
virtual const char* name () { return "B"; }
};
class C : public B
{
public:
C () {}
virtual ~C() {}
virtual const char* name () { return "C"; }
};
class D : public C
{
public:
D () {}
virtual ~D() {}
virtual const char* name () { return "D"; }
};
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