7 - 1 马会飞

 7 - 1 马会飞
已知Horse类是Pegasus类的父类，根据以下主函数完善程序内容，以实现规定的输出。不允许改变主函数的内容

#include<iostream>
using namespace std;
class Horse
{
public:
    Horse()
    {
        cout << "Horse 申请了空间..." << endl;
    }
    virtual void Fly()
    {
        cout << "Just a horse." << endl;
    }
    virtual ~Horse()
    {
        cout << "Horse 释放了空间..." << endl;
    }
};
class Pegasus:public Horse
{
public:
    Pegasus()
    {
        cout << "Pegasus 申请了空间..." << endl;
    }
    void Fly()
    {
        cout << "I can fly!" << endl;
    }
    ~Pegasus()
    {
        cout << "Pegasus 释放了空间..." << endl;
    }
};
int main()
{
    Horse* p1 = new Horse; //输出：Horse 申请了空间...
    Horse* p2 = new Pegasus; /*  输出两行：
                                 Horse 申请了空间...
                                 Pegasus 申请了空间...
                     */
    cout << endl;

    p1->Fly(); //输出：Just a horse.
    p2->Fly(); //输出：I can fly!
    cout << endl;

    delete p1; //输出：Horse 释放了空间...
    delete p2;  /* 输出两行：
                   Pegasus 释放了空间...
                   Horse 释放了空间...
            */
    return 0;
}