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  1. #include <iostream>
  2. #include <vector>
  3. #include <memory>
  4.  
  5. class Base {
  6. public:
  7.     virtual void go() {
  8.         std::cout << "I am the base class" << std::endl;
  9.     }
  10. };
  11.  
  12. typedef std::shared_ptr<Base> base_ptr;
  13.  
  14. class DerA : public Base {
  15.     void go() {
  16.         std::cout << "I am the first derivative" << std::endl;
  17.     }
  18. };
  19.  
  20. class DerB : public Base {
  21.     void go() {
  22.         std::cout << "I am the second derivative" << std::endl;
  23.     }
  24. };
  25.  
  26. class UnrelatedClass {
  27. public:
  28.     std::vector<base_ptr> vec;
  29.     void add_to_vec(const base_ptr& thing) {
  30.         vec.push_back(thing);
  31.     }
  32. };
  33.  
  34. int main() {
  35.     UnrelatedClass uc;
  36.     uc.add_to_vec(std::make_shared<Base>());
  37.     uc.add_to_vec(std::make_shared<DerA>());
  38.     uc.add_to_vec(std::make_shared<DerB>());
  39.  
  40.     for (auto thing : uc.vec) {
  41.         thing->go();
  42.     }
  43.  
  44.     return 0;
  45. }
Success #stdin #stdout 0s 3476KB
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stdin
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Standard input is empty
stdout
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I am the base class
I am the first derivative
I am the second derivative
https://ideone.com/Cz6ewX
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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