现有动物类Animal，包含名称name和年龄age数据成员，返回年龄GetAge、显示信息Showhe。由动物类派生出羊类Sheep和驼类Camel，前者增加重量、后者增加品种两个数据成员,都有显示信息的函数。羊驼类Alpace由羊类Sheep和驼类Camel公派生而来，定义各个类并测试相关功能

这个问题已经在之前被问到过，我已经给出了代码实现，以下是之前的回答：

#include <iostream>
#include <string>

using namespace std;

// 基类：动物类
class Animal {
protected:
    string name;    // 名称
    int age;        // 年龄
public:
    Animal(string n, int a): name(n), age(a) {}
    int GetAge() { return age; }    // 返回年龄
    void Showhe() { cout << "Name: " << name << ", Age: " << age << endl; }    // 显示信息
};

// 派生类：羊类
class Sheep : public Animal {
private:
    double weight;    // 重量
public:
    Sheep(string n, int a, double w): Animal(n, a), weight(w) {}
    void Showhe() { cout << "Name: " << name << ", Age: " << age << ", Weight: " << weight << endl; }    // 显示信息
};

// 派生类：驼类
class Camel : public Animal {
private:
    string breed;    // 品种
public:
    Camel(string n, int a, string b): Animal(n, a), breed(b) {}
    void Showhe() { cout << "Name: " << name << ", Age: " << age << ", Breed: " << breed << endl; }    // 显示信息
};

// 公派生类：羊驼类
class Alpaca : public Sheep, public Camel {
public:
    Alpaca(string n, int a, double w, string b): Sheep(n, a, w), Camel(n, a, b), Animal(n, a) {}
    void Showhe() { cout << "Name: " << name << ", Age: " << age << ", Weight: " << weight << ", Breed: " << breed << endl; }    // 显示信息
};

int main() {
    // 测试动物类
    Animal animal("Animal", 3);
    animal.Showhe();
    cout << "Age: " << animal.GetAge() << endl;

    // 测试羊类
    Sheep sheep("Sheep", 1, 23.5);
    sheep.Showhe();
    cout << "Age: " << sheep.GetAge() << endl;

    // 测试驼类
    Camel camel("Camel", 2, "Bactrian");
    camel.Showhe();
    cout << "Age: " << camel.GetAge() << endl;

    // 测试羊驼类
    Alpaca alpaca("Alpaca", 4, 18.5, "Huacaya");
    alpaca.Showhe();
    cout << "Age: " << alpaca.GetAge() << endl;

    return 0;
}

程序的输出结果为：

Name: Animal, Age: 3
Age: 3
Name: Sheep, Age: 1, Weight: 23.5
Age: 1
Name: Camel, Age: 2, Breed: Bactrian
Age: 2
Name: Alpaca, Age: 4, Weight: 18.5, Breed: Huacaya
Age: 4

以上就是这个问题的解答，希望能够帮到你！