list1201.cpp

teach yourself C++ in 21 days 第五版

//Listing 12.1 Simple inheritance
#include <iostream>
using namespace std;

enum BREED { GOLDEN, CAIRN, DANDIE, SHETLAND, DOBERMAN, LAB };

class Mammal
{
  public:
    // constructors
    Mammal();
    ~Mammal();

    //accessors
    int GetAge()	 const;
    void SetAge(int);
    int GetWeight() const;
    void SetWeight();

    //Other methods
    void Speak() const;
    void Sleep() const;


  protected:
    int itsAge;
    int itsWeight;
};

class Dog : public Mammal
{
  public:

    // Constructors
    Dog();
    ~Dog();

    // Accessors
    BREED GetBreed() const;
    void  SetBreed(BREED);

    // Other methods
    WagTail();
    BegForFood();

  protected:
    BREED itsBreed;
};