c++建立普通的基类building，用来存储一座楼房的层数、房间数以及它的总平方数。建立派生类house，继承building，并存储卧室与浴室的数量，另外，建立派生类office，继承building，并存储灭火器与电话的数目。设计一主函数来测试以上类的用法

好的，您的问题是关于面向对象编程的。首先，您需要定义基类building，该类包含楼房的层数、房间数以及总平方数。以下是一个可能的实现：

class Building {
public:
    Building(int floors, int rooms, int totalArea) :
        m_floors(floors), m_rooms(rooms), m_totalArea(totalArea) {}

    int getFloors() const { return m_floors; }
    int getRooms() const { return m_rooms; }
    int getTotalArea() const { return m_totalArea; }

private:
    int m_floors;
    int m_rooms;
    int m_totalArea;
};

接下来，您需要创建两个派生类，一个是house，另一个是office。派生类中需要额外的属性以及与基类相同的属性。以下代码可能会满足您的需求：

class House : public Building {
public:
    House(int floors, int rooms, int totalArea, int bedrooms, int bathrooms) :
        Building(floors, rooms, totalArea), m_bedrooms(bedrooms), m_bathrooms(bathrooms) {}

    int getBedrooms() const { return m_bedrooms; }
    int getBathrooms() const { return m_bathrooms; }

private:
    int m_bedrooms;
    int m_bathrooms;
};

class Office : public Building {
public:
    Office(int floors, int rooms, int totalArea, int fireExtinguishers, int phones) :
        Building(floors, rooms, totalArea), m_fireExtinguishers(fireExtinguishers), m_phones(phones) {}

    int getFireExtinguishers() const { return m_fireExtinguishers; }
    int getPhones() const { return m_phones; }

private:
    int m_fireExtinguishers;
    int m_phones;
};

最后，您需要设计一个主函数来测试这些类的使用。以下是一个可能的实现：

#include <iostream>

int main() {
    Building b(10, 50, 5000);
    std::cout << "Building has " << b.getFloors() << " floors, " << b.getRooms() << " rooms, and " << b.getTotalArea() << " total square feet.\n";

    House h(2, 3, 1500, 3, 2);
    std::cout << "House has " << h.getBedrooms() << " bedrooms and " << h.getBathrooms() << " bathrooms.\n";

    Office o(5, 10, 10000, 20, 50);
    std::cout << "Office has " << o.getFireExtinguishers() << " fire extinguishers and " << o.getPhones() << " phones.\n";

    return 0;
}

此主函数创建了一个基类实例、一个house实例和一个office实例，并显示它们的属性。运行该程序应输出类似以下信息:

Building has 10 floors, 50 rooms, and 5000 total square feet.
House has 3 bedrooms and 2 bathrooms.
Office has 20 fire extinguishers and 50 phones.

希望这能真正解决您的问题！