Visitor模式的C++实现

#include <iostream>
#include <string>

class emp;
class boss;
class visitor
{
public:
    visitor(){};
    ~visitor(){};
    virtual void visit( emp * emp ) {};
    virtual void visit( boss * ss ) {};
};


class emp
{
    int m_sdays, m_vdays;
    float m_salarys;
    std::string m_name;
public:
    emp(std::string name, float salary, int sdays, int vdays):m_name(name),m_salarys(salary),m_sdays(sdays),m_vdays(vdays) { };
    ~emp(){};

    std::string getname() {return m_name; };
    float getsalary() {return m_salarys ; };
    int getsdays() {return m_sdays; } ;
    int getvdays() {return m_vdays; } ;

    virtual void accept(visitor *v) { v->visit(this);};

};


class boss:public emp
{
public:
    virtual void accept(visitor *v) { v->visit(this);};
};


class vacvisitor:public visitor
{
    int m_totalvdays;
public:
    vacvisitor():m_totalvdays(0){};
    ~vacvisitor(){};
    int gettotalvdays(){ return m_totalvdays; } ;
    virtual void visit( emp * emp ) { m_totalvdays += emp->getvdays(); };
    virtual void visit( boss * boss ) { m_totalvdays += boss->getvdays(); };

};

int main()
{
    emp array[2] = {emp("a",100, 1, 2 ),emp("b",100, 1, 2 )};

    vacvisitor * vc = new vacvisitor();

    for (int i = 0; i< sizeof(array)/sizeof(emp) ; i++)
    {
        array[0].accept(vc);
    }

    std::cout << vc->gettotalvdays()<<std::endl;

    getchar();

    return 0;
}