c++实现设计一个名为Vehicle的抽象基类，这个基类包含：名称、颜色、门的数量、气缸数量、变速箱类型和油位表示。在添加一个名为horn的函数用来显示Vehicle喇叭发出的声音。print函数用来显示信息。horn函数和print函数都应该是虚函数。horn是个纯虚函数。类Taxi和Truck是派生类。 编写一个类的测试结构要求：将一个Taxi类型的对象和一个Truck类型的对象实例化，并创建一个基类指针数组分别指向这两个对象。 程序输出如下： Taxi： Number of doors:4 Number of cylinders:6 Transmission type:5 Color :yellow Fuel level:3.3 Truck: Number of doors:2 Number of cylinders:16 Transmission type:8 Color :black Fuel level:7.54 Taxi:beep beep! Truck:HOOOONK!

好的，下面是C++实现：

#include <iostream>
#include <string>
#include <vector>

using namespace std;

class Vehicle {
protected:
    string name;
    string color;
    int num_doors;
    int num_cylinders;
    int transmission_type;
    double fuel_level;
public:
    Vehicle(string n, string c, int d, int cy, int t, double f) : name(n), color(c), num_doors(d), num_cylinders(cy), transmission_type(t), fuel_level(f){}
    virtual void horn() = 0;
    virtual void print_info() {
        cout << name << ": Number of doors:" << num_doors << " Number of cylinders:" << num_cylinders << " Transmission type:" << transmission_type << " Color :" << color << " Fuel level:" << fuel_level << endl;
    }
};

class Taxi : public Vehicle {
public:
    Taxi(string n, string c, int d, int cy, int t, double f) : Vehicle(n, c, d, cy, t, f){}
    void horn() override {
        cout << "beep beep!" << endl;
    }
};

class Truck : public Vehicle {
public:
    Truck(string n, string c, int d, int cy, int t, double f) : Vehicle(n, c, d, cy, t, f){}
    void horn() override {
        cout << "HOOOONK!" << endl;
    }
};

int main() {
    Taxi taxi("Taxi", "yellow", 4, 6, 5, 3.3);
    Truck truck("Truck", "black", 2, 16, 8, 7.54);

    vector<Vehicle*> vehicles{&taxi, &truck};

    for (auto vehicle : vehicles) {
        vehicle->print_info();
        vehicle->horn();
    }

    return 0;
}

程序输出如下：

Taxi: Number of doors:4 Number of cylinders:6 Transmission type:5 Color :yellow Fuel level:3.3
beep beep!
Truck: Number of doors:2 Number of cylinders:16 Transmission type:8 Color :black Fuel level:7.54
HOOOONK!