C++关于虚函数为什么会报错？

Question

#include<iostream>
using namespace std;
class Huahome
{
public:
    virtual void Show() = 0;
    virtual ~Huahome() {};
};

class Huaba :public Huahome
{
public:
    Huaba() { cout << "花爸会武功" << endl; }
    void Show() { cout << "花爸当兵" << endl; }
    ~Huaba() { cout << "析构" << endl; }
};
class Huadi :virtual public Huaba
{
public:
    Huadi() { cout << "花弟年轻" << endl; }
    void Show() { cout << "花弟当兵" << endl; }
    ~Huadi() { cout << "析构" << endl; }
};

class Huamei :virtual public Huaba
{
public:
    Huamei() { cout << "花姐扮男装" << endl; }
    void Show() { cout << "花姐当兵" << endl; }
    ~Huamei() { cout << "析构" << endl; }
};

int mian()
{
    Huahome* PHua;
    Huaba ba;
    PHua = &ba;
    PHua->Show();
    cout << "****************************************************" << endl;
    Huadi di;
    PHua = &di;
    PHua->Show();
    cout << "****************************************************" << endl;
    Huamei mei;
    PHua = &mei;
    PHua->Show();
    cout << "****************************************************" << endl;
    return 0;
}

这个为什么报错呀，是有什么问题吗？

Answer 1

main 方法， 不是 mian