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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. class A{
  5. public:
  6. virtual void p() = 0;
  7. };
  8.  
  9. class B: public A{
  10. 	public:
  11. 	virtual void p() override {
  12. 	   cout << "abc:" << m << endl;
  13. 	};
  14. 	int m;
  15. };
  16.  
  17. void cb(void* x){
  18. 	A* a = reinterpret_cast<A*>(x);
  19. 	a->p();
  20. }
  21.  
  22. int main() {
  23. 	B b;
  24. 	b.m = 10;
  25.  
  26. 	cb(&b);	
  27. 	// your code goes here
  28. 	return 0;
  29. }
Success #stdin #stdout 0s 3468KB
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stdin
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Standard input is empty
stdout
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abc:10
https://ideone.com/ugmRfF
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
public

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