#include <iostream>

class Cat
{
public:
    Cat(int newAge = 1):age(newAge){ howManyCats++; }
    virtual ~Cat() { howManyCats--; }
    virtual int gGetAge() { return age; }
    virtual void setAge(int newAge) { age = newAge; }
    static int getHowMany() { return howManyCats; }
private:
    int age;
    static int howManyCats;
};

int Cat::howManyCats = 0;

void countCats();

int main()
{
    const int maxCats = 5;
    Cat *catHouse[maxCats];
    int i;
    for (i = 0; i < maxCats; i++)
    {
        catHouse[i] = new Cat(i);
        countCats();
    }

    for (i = 0; i < maxCats; i++)
    {
        delete catHouse[i];
        countCats();
    }
    return 0;
}

void countCats()
{
    std::cout << "There are " << Cat::getHowMany()
        << " cats alive!\n";
}