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  1. #include <iostream>
  2. #include <cstdio>
  3. #include <cstring>
  4.  
  5. using namespace std;
  6.  
  7. class Animal {
  8. protected:
  9.     const char *name;
  10. public:
  11.     Animal(const char *name) { this->name = name; }
  12.     virtual void play() = 0;
  13.     virtual ~Animal() {}
  14. };
  15.  
  16. class Dog : public Animal {
  17. public:
  18.     Dog(const char *name) : Animal(name) {}
  19.     void play() {
  20.         cout << "わんわん！" << name << "だよ" << endl;
  21.     }
  22.     virtual ~Dog() {}
  23. };
  24.  
  25. class Cat : public Animal {
  26.     private:
  27.     int sleep;
  28.     public:
  29.     Cat(const char *name, int sleep) : Animal(name) {
  30.         this->sleep = sleep;
  31.     }
  32.     void play() {
  33.         cout << "にゃあ！"<< name << "だよ" << endl;
  34.         if(sleep == 1) {
  35.             cout << "...でも寝る" << endl;
  36.         }
  37.     }
  38.     virtual ~Cat() {}
  39. };
  40.  
  41. int main(int argc, char *argv[])
  42. {
  43.     Animal *pets[] = {
  44.         new Dog("ぽち"),
  45.         new Cat("たま", 1)
  46.     };
  47.  
  48.     for(int i = 0; i < (sizeof pets / sizeof pets[0]); i++) {
  49.         pets[i]->play();
  50.     }
  51.  
  52.     for(int i = 0; i < (sizeof pets / sizeof pets[0]); i++) {
  53.         delete pets[i];
  54.     }
  55.     return 0;
  56. }
  57.  
Success #stdin #stdout 0s 5280KB
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stdin
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Standard input is empty
stdout
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わんわん！ぽちだよ
にゃあ！たまだよ
...でも寝る
https://ideone.com/mtXYEi
language:
C++ (gcc 8.3)
created:
5 days ago
visibility:
public

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