怎么改用对象指针实现（即链表）？

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

class Date{
public:
    Date();
    Date(const string &name, int x,char y,int m,int e, int c,int co);
    void setdate(const string &name, int x,char y,int m,int e, int c,int co);
    void showstudent();
    double aver();
private:
    string Name;
    int ID;
    char Sex;
    int Math;
    int English;
    int C;
    int Computer;
    int Average;
};

Date::Date()
{
}
Date::Date(const string &name, int x,char y,int m,int e, int c, int co)
{
    Name=name;
    ID=x;
    Sex= y;
    Math=m;
    English=e;
    C=c;
    Computer=co;
}
void Date::setdate(const string &name, int x,char y,int m,int e, int c, int co)
{

    Name=name;
    ID=x;
    Sex= y;
    Math=m;
    English=e;
    C=c;
    Computer=co;

}
void Date::showstudent()
{
    cout <<Name<<"  "<<ID<<"  "<<Sex<<"  "<<Math<<"  "<<English<<"  "<<C
         <<"  "<<Computer<<" "<<aver()<<endl;
}
double Date::aver()
{
    return (Math + English + C + Computer) / 4.0;
}
int main()
{   int q;
    cout<<"Please Input the Number of Students:"<< endl;
    cin>>q;
    Date *stu = new Date[q];
    string name;
    int x;
    char y;
    int m;
    int e;
    int c;
    int co;
    cout <<"Please input"<<" "<<q<<" "<<"student info: Name ID Sex Math English C Computer"<< endl;
    for(int j = 0; j < q; j++)
    {
        cin >> name >> x >> y >> m >> e >> c >> co;   
        stu[j].setdate(name, x, y, m, e, c, co);      
    }
    cout<< "Student Information you input:"<<endl;
    cout<<"Name ID Sex Math English C Computer Average" << endl;
    for(int i = 0; i < q; i++)
    {
        stu[i].showstudent();
    }
    delete[] stu;
    return 0;
}