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  1. #include <string>
  2.  
  3. class Animal
  4. {
  5. 	public:
  6. 	virtual ~Animal() = 0;
  7.  
  8. 	std::string _name;
  9. };
  10.  
  11. class Dog : public Animal
  12. {
  13. };
  14.  
  15. int main() {
  16. 	Animal* pet = new Dog;
  17. 	delete pet;
  18. 	return 0;
  19. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
/home/abDVbj/cc8ghrZk.o: In function `Dog::~Dog()':
prog.cpp:(.text._ZN3DogD2Ev[_ZN3DogD5Ev]+0xb): undefined reference to `Animal::~Animal()'
/home/abDVbj/cc8ghrZk.o: In function `Dog::~Dog()':
prog.cpp:(.text._ZN3DogD0Ev[_ZN3DogD0Ev]+0x12): undefined reference to `Animal::~Animal()'
collect2: error: ld returned 1 exit status
stdout
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Standard output is empty
https://ideone.com/KcwL8W
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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