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  1. #include <cstdio>
  2.  
  3. class A 
  4. {
  5. public:
  6. 	virtual void vf();
  7. };
  8.  
  9. class B : public A
  10. {
  11. public:
  12. 	void vf()
  13. 	{
  14. 		printf("B::vf\n");
  15. 	}
  16. };
  17.  
  18. int main() 
  19. {
  20. 	A a;
  21. 	B b;
  22. 	b.vf();
  23.  
  24. 	A* pa= &a;
  25. 	A* pb= &b;
  26. 	pa->vf();
  27. 	pb->vf();
  28. 	return 0;
  29. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
/home/qUgZY1/ccVE8Zz0.o: In function `main':
prog.cpp:(.text.startup+0x14): undefined reference to `vtable for A'
prog.cpp:(.text.startup+0x2d): undefined reference to `A::vf()'
/home/qUgZY1/ccVE8Zz0.o:(.rodata._ZTI1B[_ZTI1B]+0x8): undefined reference to `typeinfo for A'
collect2: error: ld returned 1 exit status
stdout
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Standard output is empty
https://ideone.com/MFvAdP
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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