子函数的调用问题求解。。。。。。

#include<iostream>
#include<string.h>
using namespace std;

struct SUBJECT         //课程信息结构体
{
char name[64];         //课程名称
int level;            //课程等级
};

class STUDENT  
{
public:
    STUDENT(int nMax);                        //参数nMax的值传给成员变量m_nMax
    virtual ~STUDENT();
    void AddNewSubject(SUBJECT &szSub);       //添加新课程
    SUBJECT* GetSubject(int nIndex);          //获取指定编号的课程
    int GetSubjectCount();                    //获取当前课程数目
private:
    int m_nSubjectCount;                      //当前课程数目
    int m_nMax;                               //最大课程数目
    SUBJECT* pSubject;                        //课程结构体指针
    SUBJECT* buffer;
};

STUDENT::STUDENT(int nMax)
{
m_nMax=nMax;;
buffer=new SUBJECT[m_nMax];
  if(buffer!=NULL)
  {
    pSubject=buffer;
  }
   
  else
  {
    exit(1);
  }
cout<<"栈空间已成功建立！"<<endl;   
}

STUDENT::~STUDENT()
{
delete  []pSubject;
cout<<"内存清理完毕！"<<endl;
}

void STUDENT::AddNewSubject(SUBJECT &szSub)
{
cout<<"请输入课程名称)"<<"szSub.name"<<endl;
cout<<"请输入课程名称)"<<"szSub.level"<<endl;
//int i=m_nSubjectCount;
while(szSub.level != 0)
{
cout<<"请输入课程名称)"<<"szSub.name"<<endl;
cout<<"请输入课程名称)"<<"szSub.level"<<endl;
SUBJECT* pSubject=&szSub;
//i++;
}
}

SUBJECT*STUDENT::GetSubject(int nIndex)
{
 cout<<"请输入要查找的课程编号！"<<endl;
 cin>> nIndex;
 if(nIndex<=m_nSubjectCount)
 {
  return &pSubject[nIndex];
 }
 else
 {
  cout<<"输入的课程编号错误，请重新输入！"<<endl;
  return NULL;
 }
}

int STUDENT::GetSubjectCount()
{
//cout<<"当前课程数目为："<<endl;
return m_nSubjectCount;
}

int main(void)
{
SUBJECT sub[2]={"大学物理",12053,"大学英语",12054};
STUDENT(10);
GetSubject(1);

    return 0;
}

其中关于GetSubject(1);的调用怎么调用啊