Constructors and Destructors during inheritance - C++ Class

C++ examples for Class:Inheritance

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Description

Constructors and Destructors during inheritance

Demo Code

                                                     
#include <iostream> 
                                                        
enum COLOR { RED, BLUE, WHITE, BLACK, EE, YELLOW }; 
                                                        
class Pet /*from   w  w w  . j a  va  2 s.  co  m*/
{ 
public: 
    // constructors 
    Pet(); 
    ~Pet(); 
                                                        
    // accessors 
    int getAge() const { return age; } 
    void setAge(int newAge) { age = newAge; } 
    int getWeight() const { return weight; } 
    void setWeight(int newWeight) { weight = newWeight; } 
                                                        
    // other member functions 
    void speak() const { std::cout << "Pet sound!\n"; } 
    void sleep() const { std::cout << "shhh. I'm sleeping.\n"; } 
                                                        
protected: 
    int age; 
    int weight; 
}; 
                                                        
class Dog : public Pet 
{ 
public: 
    // constructors 
    Dog(); 
    ~Dog(); 
                                                        
    // accessors 
    COLOR getBreed() const { return color; } 
    void setBreed(COLOR newBreed) { color = newBreed; } 
                                                        
    // other member functions 
    void wagTail() { std::cout << "Tail wagging ...\n"; } 
    void begForFood() { std::cout << "Begging for food ...\n"; } 
                                                        
private: 
    COLOR color;  
}; 
                                                        
Pet::Pet(): 
age(3), 
weight(5) 
{ 
    std::cout << "Pet constructor ...\n"; 
} 
                                                        
Pet::~Pet() 
{ 
    std::cout << "Pet destructor ...\n"; 
} 
                                                        
Dog::Dog(): 
color(RED) 
{ 
    std::cout << "Dog constructor ...\n"; 
} 
                                                        
Dog::~Dog() 
{ 
    std::cout << "Dog destructor ...\n"; 
} 
                                                        
int main() 
{ 
    Dog fido; // create a dog 
    fido.speak(); 
    fido.wagTail(); 
    std::cout << "Fido is " << fido.getAge() << " years old\n"; 
    return 0; 
}

Result


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