学生信息管理系统想不通，求解.......

#include "fstream.h"
#include "string.h"
#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
#include<process.h>
void Wfile();
//================================================================================
class CPerson
{
public:
   
    CPerson();
    void showP();
    virtual ~CPerson();
    char IDNo[25];
protected:
    char Name[20];
   
    char Tel[20];
    char Addr[50];
};
CPerson::CPerson()
{
    cout<<"请输入身份证号：";
    cin>>IDNo;
    cout<<"请输入姓名：";
    cin>>Name;
    cout<<"请输入家庭住址：";
    cin>>Addr;
    cout<<"请输入电话号码：";
    cin>>Tel;   
}

CPerson::~CPerson()
{
}
void CPerson::showP()
{
    cout<<"身份证号："<<IDNo<<"  ";
    cout<<"姓名："<<Name<<endl;
    cout<<"家庭住址："<<Addr<<"  ";
    cout<<"电话号码："<<Tel<<endl;;
}
//================================================================================
class CStudent : public CPerson
{
public:
    CStudent();
    void showS();
    virtual ~CStudent();
    char  StuNo[20];
private:
    float Average;
    float English;
    float Math;

};
CStudent::CStudent()
{
    cout<<"请输入学生学号：";
    cin>>StuNo;
    cout<<"请输入数学成绩：";
    cin>>Math;
    cout<<"请输入英语成绩：";
    cin>>English;
    Average=(English+Math)/2.0;
}

CStudent::~CStudent()
{
}
void CStudent::showS()
{
    cout<<"学生学号："<<StuNo<<" ";
    cout<<"英语成绩："<<English<<" ";
    cout<<"数学成绩："<<Math<<endl;
    cout<<"平均分："<<Average<<endl;
}
//================================================================================
class CClass
{
public:
    CClass();
    virtual ~CClass();
    CStudent *n[50];
    static    int i;
    void input();
    void outp();
    void Add();
private:
    char ClassN[50];
};

CClass::CClass()
{
    for(int k=0;k<50;k++)
    {
        n[k]=NULL;
    }
}

CClass::~CClass()
{
    for(int m=0;m<50;m++)
    {
        delete n[m];
        n[m]=NULL;
    }
}
int CClass::i=0;

void CClass::input()
{  
    cout<<"请输入班级名称：";
    cin>>ClassN;
    i++;
    cout<<"您已成功添加一个班级，请返回主菜单选择添加学生信息功能."<<endl;
   
    /*int j=0;
    for (i=0;j==0;i++)
    {
        n[i]=new CStudent;
        cout<<"输入任意键   回车退回主菜单";
        cin>>j;
    }*/
   
}
void CClass::Add()
{
    int j=0;
    for (i=0;j==0;i++)
    {   
        cout<<"请输入第 " <<i+1<<"个学生的信息";
        n[i]=new CStudent;
        cout<<"输入任意键   回车退回主菜单";
        cin>>j;
    }
    i++;
}
void CClass::outp()
{
    char search_name[50];
    int k;
    cout<<"请输入你想要打印的学生的身份证号."<<endl;
    cin>>search_name;
        for(k=0;k<i;k++)
    {
        if(strcmp(n[k]->IDNo,search_name)==0)
           
        {    cout<<"班级名称："<<ClassN<<"  ";
            n[k]->showP();
            n[k]->showS();
        }
    }
}

//================================================================================
/*void Wfile()
{
    int j;char c;
    int i;
    CClass A1[1];
    cout<<"是否保存文件？是输入 y 否 输入 n    退出 \n";
    c=getchar();
    c=getchar();
    if(c=='y'||c=='Y')
    {
        ofstream fout("test");
        if(!fout)
        {
            cout<<"Cantnot open ouput file.";
        }
        for(j=0;j<i;j++)
        {
        fout<<A1[j].Math;
        }
        fout.close();
    }
}*/
void main()
{   
    int j,p=0;   
    CClass A[50];
    do
    {
        cout<<"_____________________学生信息管理系统___________________"<<endl;
        cout<<"_______________________请选择操作_______________________"<<endl;
        cout<<"______________________01.创建班级________________________"<<endl;
        cout<<"______________________02.添加学生信息____________________"<<endl;
        cout<<"______________________03.修改学生信息____________________"<<endl;
        cout<<"______________________04.删除学生信息____________________"<<endl;
        cout<<"______________________05.打印学生信息____________________"<<endl;
        cout<<"______________________06.退出____________________________"<<endl;
        cout<<"___________请输入你要的功能：___________________________"<<endl;
        cin>>j;
        switch(j)
        {
        case 01:A[p].input();break;
        case 02:A[p].Add();break;
        case 03:;break;
        case 04:;break;
        case 05:A[p].outp();break;
        case 06:;break;
        default:cout<<"错误!!";break;
        }
        }while(j!=06);
    p++;

}
//================================================================================