#include <iostream>
using namespace std;
 
 
template<class T>class MyArray{
    public: T* database[20];
    public: T* get(int index){return database[index];}
    public: void set(int index,T* t){database[index]=t;}
};
template<class T,class T2> class Adapter{
	public: MyArray<T>* underlying;
	public: void setUnderlying(MyArray<T>* pUnder){underlying=pUnder;}
	public: T2* get(int index){return static_cast<T2*>(underlying->get(index));}
};
class B{};
class C:public B{};
class D:public C{};
class E:public D{};
 
int main() {
	MyArray<B> bs;  bs.set(0,new C());
	Adapter<B,C> cs;
	cs.setUnderlying(&bs);
	C* c=cs.get(0);
	return 0;
}

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