C++专业程序员如何实现常见的抽象？

class IAnimal {
public:
    virtual void eat() = 0;
    virtual void sleep() = 0;
};

class Dog : public IAnimal {
public:
    void eat() override {
        // 具体实现
    }
    void sleep() override {
        // 具体实现
    }
};

class Animal {
public:
    virtual void eat() = 0;
    virtual void sleep() = 0;
};

class Dog : public Animal {
public:
    void eat() override {
        // 具体实现
    }
    void sleep() override {
        // 具体实现
    }
};

template<typename T>
class Container {
public:
    void add(T item) {
        // 具体实现
    }
    T get(int index) {
        // 具体实现
    }
};

class ISortStrategy {
public:
    virtual void sort(std::vector<int>& data) = 0;
};

class BubbleSort : public ISortStrategy {
public:
    void sort(std::vector<int>& data) override {
        // 具体实现
    }
};

class QuickSort : public ISortStrategy {
public:
    void sort(std::vector<int>& data) override {
        // 具体实现
    }
};

class IAnimalFactory {
public:
    virtual std::shared_ptr<IAnimal> createAnimal() = 0;
};

class DogFactory : public IAnimalFactory {
public:
    std::shared_ptr<IAnimal> createAnimal() override {
        return std::make_shared<Dog>();
    }
};