arrayfilled2.cpp

《24学时精通c++》的光盘内容

     //Listing 14.1 static data members

     #include <iostream.h>

     class Cat
     {
    public:
       Cat(int age):itsAge(age){HowManyCats++; }
       virtual ~Cat() { HowManyCats--; }
       virtual int GetAge() { return itsAge; }
       virtual void SetAge(int age) { itsAge = age; }
       static int HowManyCats;

    private:
       int itsAge;

    };

    int Cat::HowManyCats = 0;

    int main()
    {
       const int MaxCats = 5; int i;
       Cat *CatHouse[MaxCats];
       for (i = 0; i<MaxCats; i++)
          CatHouse[i] = new Cat(i);

       for (i = 0; i<MaxCats; i++)
       {
          cout << "There are ";
          cout << Cat::HowManyCats;
         cout << " cats left!\n";
          cout << "Deleting the one which is ";
          cout << CatHouse[i]->GetAge();
          cout << " years old\n";
          delete CatHouse[i];
          CatHouse[i] = 0;
       }
     return 0;
 }