定义一个车基类Vehicle，含私有成员speed，weight。派生出自行车类Bicycle，增加height(高度)成员；汽车类Car，增加seatNum(座位数)成员。实现Vehicle, Bicycle和Car三个类，使主函数能顺利执行并得到预期结果。 #include <iostream> using namespace std; …… int main() { Vehicle v(100,500); v.run(); Car car(120,400,6); car.run(); Bicycle bicycle(30,10,26); bicycle.run(); Vehicle *vp; vp=&car; vp->run(); vp=&bicycle; vp->run(); return 0; } 得到的结果是： Weight 500, speed 100 Weight 400, speed 120 seatNum: 6 Weight 10, speed 30 height: 26 Weight 400, speed 120 seatNum: 6 Weight 10, speed 30 height: 26

好的，这是一个基础的面向对象编程问题，下面是实现代码：

#include <iostream>
using namespace std;

class Vehicle {
private:
    int speed;
    int weight;
public:
    Vehicle(int s, int w) : speed(s), weight(w) {}
    virtual void run() {
        cout << "Weight " << weight << ", speed " << speed << endl;
    }
};

class Bicycle : public Vehicle {
private:
    int height;
public:
    Bicycle(int s, int w, int h) : Vehicle(s, w), height(h) {}
    void run() {
        Vehicle::run();
        cout << "height: " << height << endl;
    }
};

class Car : public Vehicle {
private:
    int seatNum;
public:
    Car(int s, int w, int num) : Vehicle(s, w), seatNum(num) {}
    void run() {
        Vehicle::run();
        cout << "seatNum: " << seatNum << endl;
    }
};

int main() {
    Vehicle v(100, 500);
    v.run();
    Car car(120, 400, 6);
    car.run();
    Bicycle bicycle(30, 10, 26);
    bicycle.run();
    Vehicle *vp;
    vp = &car;
    vp->run();
    vp = &bicycle;
    vp->run();
    return 0;
}

在这个实现中，我们首先定义了一个基类Vehicle，包含私有成员speed和weight，并实现了虚函数run()，用于输出基类对象的属性。然后我们分别派生出自行车类Bicycle和汽车类Car，增加各自的成员变量height和seatNum，并覆盖了基类的run()函数，用于输出各自的属性。最后在主函数中创建了各种对象并输出其属性，包括使用基类指针调用派生类的虚函数。