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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. class A // Abstract
  5. {
  6. public:
  7.   virtual string Identify() = 0;
  8. };
  9.  
  10. class B : public A
  11. {
  12. public:
  13.   string Identify() {return "B"; }
  14. };
  15.  
  16. class C : public B {
  17. public:
  18. 	virtual string D_Work() = 0;	
  19. };
  20.  
  21. class D : public C
  22. {
  23. public:
  24.   string D_Work() {return "D_Work"; }
  25. };
  26.  
  27. int main() {
  28. 	C *d = new D;
  29. 	std::cout << d->D_Work();
  30.  
  31. 	return 0;
  32. }
Success #stdin #stdout 0s 4368KB
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stdin
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Standard input is empty
stdout
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D_Work
https://ideone.com/eiPBPx
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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