- #include <iostream> 
-   
- class A { 
-     public: 
-     	int a; 
- 		A(int _a) : a(_a) {} 
- }; 
-   
- class B { 
- 	public: 
- 		int b; 
- 		B(int _b) : b(_b) {} 
- }; 
-   
- int main() { 
- 	void* p[2]; 
- 	A* a = new A(10); 
- 	B* b = new B(5); 
- 	p[0] = a; 
- 	p[1] = b; 
- 	std::cout << ((A*)(p[0]))->a << std::endl; 
-     std::cout << ((B*)(p[1]))->b << std::endl; 
- 	return 0; 
- } 
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