c++的编程问题求帮忙找出问题！！

#include<iostream>
#include<stdlib.h>
#include<math.h>
#include<string>
#define LIST_INIT_SIZE 50
#define LISTINCREMENT 10
using namespace std;
class Student
{
    public:
        
        void InputStudent();//输入学生信息
        void OutputStudent();//输出学生信息
        void ChangeStudent();//修改学生信息
        void DeleteStudent();//删除学生信息
        void SearchStudent();//查找
        friend class Class;
    private:
         
        string name,sex;
        int id,age;
        float english_score,math_score,computer_score;
         
};
void Student::InputStudent()
{
    cout<<"请输入你要录入的学生的姓名:";
    cin>>name;
    cout<<"\n"<<"性别:";
    cin>>sex;
    cout<<"\n"<<"年龄:";
    cin>>age;
    cout<<"\n"<<"学号:";
    cin>>id;
    cout<<"\n"<<"数学成绩:";
    cin>>math_score;
    cout<<"\n"<<"英语成绩:";
    cin>>english_score;
    cout<<"\n"<<"计算机成绩:";
    cin>>computer_score;
    cout<<"\n";
}
void Student::OutputStudent()
{
    cout<<"姓名 性别 学号 年龄 数学 英语 计算机"<<endl;
    cout<<name<<" "<<sex<<" "<<id<<" "<<age<<" "<<math_score<<" "<<english_score<<" "<<computer_score<<" ";
    cout<<"\n";
}
typedef struct {
    Student *elem;
    int length;
    int listsize;
}SqList;
class Class
{
    public:
        
        void InputClass();//输入班级信息
        void OutputClass();//输出班级信息
        void InitClass_Sq(SqList &L);
        void FillClass_Sq(SqList &L,int i,Student St);//将学生类插入到班级的线性表中
        int GetClassNumber();
        SqList GetClass();
    private:
        SqList Class;
        string ClassName;
        int ClassNumber;
        //要增加学生类的顺序表
      
};
void Class::InputClass()
{
    cout<<"请输入你要创建的班级的名称:";
    cin>>ClassName;
    cout<<"\n";
    cout<<"请输入该班级的人数:";
    cin>>ClassNumber;
    cout<<"\n";
}
void Class::OutputClass()
{
    cout<<"该班级总人数为:"<<ClassNumber<<endl;
    cout<<"该班级所有学生姓名为:";
    for(int i=1;i<=ClassNumber;i++)
    {
        cout<<Class.elem[i-1].name<<"\n";
    }
    cout<<"\n";
}
void Class::InitClass_Sq(SqList &L){

    L.elem=(Student *)malloc(LIST_INIT_SIZE*sizeof(Student));
    if(!L.elem)exit(OVERFLOW);
    L.length=0;
    L.listsize=LIST_INIT_SIZE;
}
void Class::FillClass_Sq(SqList &L,int i,Student St){

    if(L.length>=L.listsize){
        Student *newbase;
        newbase=(Student *)realloc(L.elem,(L.listsize+LISTINCREMENT)*sizeof(Student));
        if(!newbase)exit(OVERFLOW);
        L.elem=newbase;
        L.listsize+=LISTINCREMENT;
    }
    L.elem[i-1]=St;
    ++L.length;
}
int Class::GetClassNumber()
{
    return ClassNumber;
}
SqList Class::GetClass()
{
    return Class;
}
int main()
{
    Class Classone;
    Classone.InputClass();
    SqList ClassoneList;
    Classone.InitClass_Sq(ClassoneList);
    Student stud[Classone.GetClassNumber()];
   
    for(int j=0;j<Classone.GetClassNumber();j++){
   
        
        
        stud[j].InputStudent();
        Classone.FillClass_Sq(ClassoneList,j+1,stud[j]);
        
    }
    Classone.GetClass()=ClassoneList;
    Classone.OutputClass();
    return 0;
}