API tools faq
paste
Advertisement
RobertDeMilo

YB5.5 Решение проблемы с помощью виртуальных методов

RobertDeMilo
Apr 14th, 2024
42
0
Never
Add comment
Not a member of Pastebin yet? Sign Up, it unlocks many cool features!
C++ 1.03 KB | None | 0 0
raw download clone embed print report
  1. Базовый класс ничего не знает про методы классов потомков
  2.  
  3. #include <iostream>
  4.  
  5. using namespace std;
  6.  
  7. class Animal
  8. {
  9. public:
  10.  
  11.     Animal(const string& type):type_(type){}
  12.  
  13.     void Eat(const string& fruit)
  14.     {
  15.         cout<<type_<<" eats "<<fruit<<endl;
  16.     }
  17.  
  18.     virtual void Voice()const{}
  19.  
  20. private:
  21.     const string type_;
  22. };
  23.  
  24. class Cat : public Animal
  25. {
  26. public:
  27.  
  28.     Cat():Animal("cat"){}
  29.  
  30.  
  31.     void Voice() const override
  32.     {
  33.         cout << "Meow! " << endl;
  34.     }
  35. };
  36.  
  37. class Dog : public Animal
  38. {
  39. public:
  40.  
  41.     Dog():Animal("dog"){}
  42.  
  43.     void Voice() const override
  44.     {
  45.         cout << "Whaf! " << endl;
  46.     }
  47. };
  48.  
  49. class Parrot:public Animal
  50. {
  51. public:
  52.  
  53.     Parrot(const string& name):Animal("parrot"),name_(name){}
  54.  
  55.     void Voice() const override
  56.     {
  57.         cout<<name_<<" is good!"<<endl;
  58.     }
  59.    
  60. private:
  61.     const string& name_;
  62. };
  63.  
  64. void MakeSound(const Animal& a)
  65. {
  66.     a.Voice();
  67. }
  68.  
  69. int main()
  70. {
  71.     Cat c;
  72.     Dog d;
  73.     Parrot p("Kesha");
  74.  
  75.     MakeSound(c);
  76.     MakeSound(d);
  77.     MakeSound(p);
  78.  
  79.     return 0;
  80. }
Advertisement
Add Comment
Please, Sign In to add comment
Advertisement
Public Pastes
Advertisement
We use cookies for various purposes including analytics. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy.  OK, I Understand
Not a member of Pastebin yet?
Sign Up, it unlocks many cool features!