2．定义一个车（Vehicle）类，有run，stop等成员函数， 由此派生出自行车（bicycle）类、汽车（motocar）类，由bicycle类和motocar类派生出摩托车类（motocycl

2．定义一个车（Vehicle）类，有run，stop等成员函数， 由此派生出自行车（bicycle）类、汽车（motocar）类，由bicycle类和motocar类派生出摩托车类（motocycl

#include<iostream>
using namespace std;/*
2．定义一个车（Vehicle）类，有run，stop等成员函数，
由此派生出自行车（bicycle）类、汽车（motocar）类，由bicycle类和motocar类派生出摩托车类（motocycle），
它们都run, stop等成员函数，编写相应的虚函数并测试。
*/class Vehicle {
public:virtual void run() { cout << "run  in vehicle" << endl; }virtual void stop() { cout << "stop in vehicle" << endl; }
};class Bicycle : virtual public Vehicle {
public:void run() { cout << "run  in Bicycle" << endl; }void stop() { cout << "stop in Bicycle" << endl; }
};class motocar : virtual public Vehicle {
public:void run() { cout << "run  in motocar" << endl; }void stop() { cout << "stop in motocar" << endl; }
};class Motocycle : public Bicycle, public motocar {
public:void run() { cout << "run  in motocycle" << endl; }void stop() { cout << "stop in motocycle" << endl; }
};void fun(Vehicle *p) {p->run();p->stop();
}int main() {Vehicle m1;Bicycle m2;motocar m3;Motocycle m4;fun(&m1);fun(&m2); fun(&m3); fun(&m4);getchar();return 0;
}