大家帮忙看一下，为什么参数没有传入

//4、定义一个基类Person,从它派生出类Student和类Worker，再由类Student和Worker共同派生出WorStu。

//类Person的属性有姓名、年龄、性别，操作有设置姓名、年龄、性别和显示信息等。类Student的属性增加

//系别、专业和学号属性及相应的操作。类Worker新增部门和工作属性及相应操作。在主函数中声明一个

//WorStu最远派生类的对象，显示相关信息。



#include <iostream>

using namespace std;



class Person

{

public:

	Person(){}

	~Person(){}

	void set_name(string);

	void set_age(int);

	void set_sex(string);

	string show_name(){return name ;}

	int show_age(){return age ;}

	string show_sex(){return sex ;}

	void display();

protected:

	string name ;

	int age ;

	string sex ;

};

class Student:virtual public Person

{

public:

	Student(){}

	~Student(){}

	void set_department(string);

	void set_major(string) ;

	void set_id(long) ;

	string show_department(){return department ;}

	string show_major(){return major ;}

	long show_id(){return id ;}

protected:

	string department ;

	string major ;

	long id ;

};

class Worker:virtual public Person

{

public:

	Worker(){}

	~Worker(){}

	void set_section(string) ;

	void set_job(string);

	string show_section(){return section ;}

	string show_job(){return job ;}

protected:

	string section ;

	string job ;

};



class WoeStu:public Student ,public Worker

{

public:

	void show() ;

};

void Person::set_name(string a)

{

	name = a ;

}

void Person::set_age(int a)

{

	age = a ;



}

void Person::set_sex(string a)

{

	sex = a ;

}

void Person::display()

{

	cout<<"name:\n";

	show_name();

	cout<<"age:\n";

	show_age();

	cout<<"sex:\n";

	show_sex();

}

void Student::set_department(string a )

{

	department = a ;

}

void Student::set_major(string a)

{

	major = a ;

}

void Student::set_id(long a)

{

	id = a ;

}

void Worker::set_section(string a)

{

	section = a ;

}

void Worker::set_job(string a )

{

	job = a ;

}

void WoeStu::show()

{

	display();

	cout<<"department:\n";

	show_department();

	cout<<"major:\n";

	show_major();

	cout<<"id:\n";

	show_id();

	cout<<"section:\n";

	show_section();

	cout<<"job:\n";

	show_job();

}



int main()

{

	WoeStu WS ;

	WS.set_name("Tom");

	WS.set_age(25);

	WS.set_sex("man");

	WS.set_department("computer science ");

	WS.set_major("Computer Science and Technology");

	WS.set_id(11320088);

	WS.set_section("export");

	WS.set_job("sales");

	WS.show();

	return 0 ;

}