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  1. #include <iostream>
  2. #include <vector>
  3. #include <typeinfo> // for typeid
  4.  
  5. class Animal
  6. {
  7. public:
  8.  
  9.     virtual void yawn() = 0;
  10. };
  11.  
  12. class Cat : public Animal
  13. {
  14. public:
  15.  
  16.    void scratchTheLivingHellOutOfYou()
  17.    {
  18.        std::cout << "*scratch*\n";
  19.    }
  20.  
  21.    virtual void yawn() { std::cout << "meoyawnn!\n"; }
  22. };
  23.  
  24. class Tiger : public Cat
  25. {
  26. public:
  27.  
  28.     virtual void yawn() { std::cout << "RAWR\n"; }
  29.  
  30. };
  31.  
  32. // EXPECTED OUTPUT:
  33. // *scratch*
  34. // RAWR
  35. // *scratch*
  36. // meoyawnn!
  37. int main(int argc, char* argv[])
  38. {
  39.     std::vector<Animal*> animals;
  40.     animals.push_back(new Cat);
  41.     animals.push_back(new Tiger);
  42.  
  43.     std::cout << "USING TYPEID\n\n\n";
  44.  
  45.     // loop through the vector
  46.     for(auto i = animals.begin(); i != animals.end(); ++i)
  47.     {
  48.         Animal* animal = *i;
  49.  
  50.         // if it's a cat
  51.         if(typeid(Cat) == typeid(*animal))
  52.         {
  53.             // make the cat scratch you
  54.             Cat* cat = static_cast<Cat*>(animal);
  55.             cat->scratchTheLivingHellOutOfYou();
  56.         }
  57.  
  58.         // make the animal yawn
  59.         animal->yawn();
  60.     }
  61.  
  62.     std::cout << "\n\n\nUSING DYNAMIC_CAST\n\n\n";
  63.  
  64.     // loop through the vector
  65.     for(auto i = animals.begin(); i != animals.end(); ++i)
  66.     {
  67.         Animal* animal = *i;
  68.  
  69.         // if it's a cat
  70.         if(Cat* cat = dynamic_cast<Cat*>(animal))
  71.         {
  72.             // make the cat scratch you
  73.             cat->scratchTheLivingHellOutOfYou();
  74.         }
  75.  
  76.         // make the animal yawn
  77.         animal->yawn();
  78.     }
  79.  
  80.     return 0;
  81. }
Success #stdin #stdout 0s 3064KB
comments (?)
stdin 
Standard input is empty
stdout 
USING TYPEID


*scratch*
meoyawnn!
RAWR



USING DYNAMIC_CAST


*scratch*
meoyawnn!
*scratch*
RAWR
https://ideone.com/4annRR
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
secret

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