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  1. #include <iostream>
  2. #include <string>
  3. #include <memory>
  4. #include <vector>
  5. using namespace std;
  6.  
  7. class Animal {
  8. public:
  9.     virtual ~Animal() {}
  10.     virtual void PrintName() = 0;
  11. protected:
  12.     string mName;
  13. };
  14.  
  15. class Cat : public Animal {
  16. public:
  17.     Cat(const string& inName)
  18.     {
  19.         mName = inName;
  20.     }
  21.     void PrintName() final {
  22.         cout << "this is a " << mName << endl;
  23.     }
  24. };
  25.  
  26. class Dog : public Animal {
  27. public:
  28.     Dog(const string& inName)
  29.     {
  30.         mName = inName;
  31.     }
  32.     void PrintName() final {
  33.         cout << "this is a " << mName << endl;
  34.     }
  35. };
  36.  
  37. vector<unique_ptr<Animal>> MyAnimal;
  38.  
  39. template <class tDerived, class...tConstructArgs>
  40. tDerived* AddAnimal(tConstructArgs&&... inArgs)
  41. {
  42. 	auto theanimal = make_unique<tDerived>(forward<tConstructArgs>(inArgs)...);
  43. 	auto result = theanimal.get();
  44. 	MyAnimal.push_back(move(theanimal));
  45. 	return result;
  46. };
  47.  
  48. int main() {
  49. 	// your code goes here
  50. 	auto thepet = AddAnimal<Cat>("my cat");
  51. 	thepet->PrintName();
  52. 	for(const auto& pet:MyAnimal)
  53. 	{
  54. 		pet->PrintName();
  55. 	}
  56. 	return 0;
  57. }
Success #stdin #stdout 0s 5536KB
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Standard input is empty
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this is a my cat
this is a my cat
https://ideone.com/9kTYs1
language:
C++ (gcc 8.3)
created:
2 years ago
visibility:
public

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