我正在尝试一个傻瓜 C++ 练习，我遇到了一个错误，说类 'GraduateStudent' 没有任何名为 'advisor' 的字段

在尝试创建两个类并使用它时，我遇到了一个错误，说我的"类'研究生'没有任何名为'顾问'的字段"，他编码的对象如下;请帮我解决，谢谢 该程序演示了两个对象的创建和使用，一个是班级学生，另一个是研究生。该程序的输出如下：

constructing student Cy N
6
Sense constructing student Matt Madox 
constructing graduate student Matt Madox
2
adding grade to Cy N Sense
adding grade to Matt Madox Matt’s qualifier grade = 1.5
Press any key to continue . . . 

法典：

//inheritanceexample
#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <strings.h>
using namespace std;
// Advisor empty class
class Advisor{};
class Student
{
public:
Student((char* pName="no name")
:   average(0.0), SemesterHours(0)
{
strncpy(name, pName, MAXNAMESIZE);
name[MAXNAMESIZE -1] = '';
cout << "constructing object"
<< name
<< endl;
}
void addcourse(int Hours, float grade) 
{
cout << "adding grade to " << name << average << endl;
average = ( SemesterHours * average + grade );
SemesterHours +=Hours;
average = average / SemesterHours; 
}
int hours(){return SemesterHours;}
float gpa(){return average;}
}
void addCourse(int hours, float grade)
{
cout << "adding grade to " << name << average << endl;
average = ( SemesterHours * average + grade );
SemesterHours +=Hours;
average = average / SemesterHours; 
}
int hours(){return SemesterHours;}
int gpa(){return average;} 
protected:
char name[MAXNAMESIZE];
int SemesterHours;
float average; 
};
// my sublass
class GraduateStudent : public Student
{
public:
GraduateStudent(char  *pName, Advisor &adv, float qG = 0.0) : Student(pName), advisor(adv), qualifierGrade(qG)
{
advisor;
float qualifiergrade;       
cout<< "constructing graduate students"
<<pName
<<endl;
}
};
int main(int nNumberofargs, char* PSZArgs[])
{
Advisor advisor;
// create two objects
Student llu("Cy N Sense");
GraduateStudent gs("Matt Madox", advisor, 1.5);
llu.addCourse(3, 2.5); gs.addCourse(3, 3.0);
// display the graduate student’s qualifier grade
cout << "Matt’s qualifier grade = "
<< gs.qualifier() 
<< endl; 
cout << "Matt’s qualifier grade = "
<< gs.qualifier()
<< endl;
// wait until user is ready before terminating program 
syestem("PAUSE")
return 0;

};