C++项目作业 学生管理系统

/*Student.h*/
#pragma once
#include<string.h>
using namespace std;
#include<string>

class Student
{
public:
    //ID age name math english sport 专业 是子类都具有的 所以就在基类中声明
    int ID;
    int age;
    string major = "";
    char name[];
    float math, english, sport;
    Student *next;               //链表指针
    //一下get函数  因为子类的专业不同  所以实现的方式不同 声明虚函数 在子类中实现
    virtual float get_shi_bian_fun();
    virtual float get_fan_han_fen_xi() ;
    virtual float get_wei_fen_jihe();
    virtual float get_zonghe_english();
    virtual float get_spoken_english();
    virtual float get_zu_cheng_yuanli();
    virtual float get_ti_xi_jie_gou();
    virtual float get_hui_bian();
    virtual string  get_major();
    //因为每个子类遍历的东西也不同  所以遍历函数也要为虚函数  在子类中以不同的方式来实现
    virtual void  traverse(Student *t);
    virtual float get_main_average();//取平均数也一样，返回平均成绩
    virtual float get_average_score();
    virtual void change();  //每个成员的科目不一样，需要修改的东西也不一样
    Student();
    virtual ~Student();
};

/*Student.cpp

/*Math_Student.h*/
#pragma once
#include "Student.h"
#include <string>
class Math_Student :
    public Student
{
public:
    //特有的科目成员  都声明为float
    float shi_bian_fun;
    float fan_han_fen_xi;
    float wei_fen_jihe;
    string major = "Math_Student";//专业直接初始化
    Math_Student();
    ~Math_Student();
    //get函数  方便在manage类里面拿到数据信息
    float get_shi_bian_fun();
    float get_fan_han_fen_xi() ;
    float get_wei_fen_jihe() ;
    float get_main_average();
    float get_average_score();
    string  get_major();
    //遍历信息
    void traverse(Student *t);
    void change(); //修改信息

};

/*Math_Student.cpp*/
#include "Math_Student.h"

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

Math_Student::Math_Student()
{

    cout << "请输入学生信息：" << endl;
    cout << "age:" << endl;
    cin >> age;
    getchar();
    cout << "name:";
    cin >> name;
    getchar();
    cout << "ID:" << endl;
    cin >> ID;
    getchar();
    cout << "sport_score:" << endl;
    cin >>sport;
    getchar();
    cout << "math_score:" << endl;
    cin >> math;
    getchar();
    cout << "english_score" << endl;
    cin >> english;
    getchar();
    cout << "shi_bian_fun_score" << endl;
    cin >>shi_bian_fun;
    getchar();
    cout << "fan_han_fen_xi_score" << endl;
    cin >>fan_han_fen_xi;
    getchar();
    cout << "wei_fen_jihe_score" << endl;
    cin >>wei_fen_jihe;
    getchar();

    cout << "录入成功！" << endl;
}

Math_Student::~Math_Student()
{
}

void Math_Student::change() {
    cout << "    实变函数：" << endl;
    cin >> shi_bian_fun;
    getchar();
    cout << "    泛函分析：" << endl;
    cin >> fan_han_fen_xi;
    getchar();
    cout << "    微分几何：" << endl;
    cin >> wei_fen_jihe;
    getchar();

}

void Math_Student::traverse(Student *t) {
    //公共的信息修改 在 manage 里面 这里来到类里面来修改特有的信息
            cout << "学生信息为：" << endl
                 << "    学号：" << t->ID << "  姓名：" <<name << "  年龄：" <<age << "  专业：" <<major << endl
                 <<"公共课成绩："<<endl
                 << "    数学：" <<math << "  英语：" <<english << "  体育：" << sport << endl
                 << "专业课成绩："<<endl
                 <<"     实变函数："<<t->get_shi_bian_fun()<<"  泛函分析："<<t->get_fan_han_fen_xi()<<"  微分几何："<<t->get_wei_fen_jihe()<<endl
                 <<endl;
}

float Math_Student::get_main_average() {

    return ((math + english + sport) / 3.0);
}

float  Math_Student::get_average_score() {
    float av = ;
    av += math; av += sport; av += english, av += shi_bian_fun, av += fan_han_fen_xi, av += wei_fen_jihe;
    return (av / 6.0);

}

float Math_Student:: get_shi_bian_fun() {
    return shi_bian_fun;
}

float Math_Student ::get_fan_han_fen_xi() {
    return fan_han_fen_xi;
}

float Math_Student::get_wei_fen_jihe() {
    return  wei_fen_jihe;
}

string  Math_Student::get_major() {
    return major;
}
;

/*English_Student.h*/
#pragma once
#include "Student.h"
#include <string>
class English_Student :
    public Student
{
public:
    //特有成员变量
    float zonghe_english;
    float spoken_english;
    string major = "English_Student";

    English_Student();
    ~English_Student();
    float get_zonghe_english();
    float get_spoken_english();
    string  get_major();
    float get_main_average();
    void change();
    void  traverse(Student *t);
    float get_average_score();
};

/*English_Student.cpp*/
#include "English_Student.h"

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

English_Student::English_Student()
{

    cout << "age:" << endl;
    cin >> age;
    getchar();
    cout << "name:";
    cin >> name;
    getchar();
    cout << "ID:" << endl;
    cin >> ID;
    getchar();
    cout << "sport_score:" << endl;
    cin >> sport;
    getchar();
    cout << "math_score:" << endl;
    cin >> math;
    getchar();
    cout << "english_score" << endl;
    cin >> english;
    cout << "zonghe_english_score" << endl;
    cin >> zonghe_english;
    cout << "spoken_english_score" << endl;
    cin >> spoken_english;
    getchar();
    cout << "录入成功！" << endl;
}

English_Student::~English_Student()
{
}

void English_Student::change() {
    //公共的信息修改 在 manage 里面 这里来到类里面来修改特有的信息
    cout << "    综合英语：" << endl;
    cin >> zonghe_english;
    cout << "    口语英语：" << endl;
    cin >> spoken_english;
    getchar();
}

 void  English_Student:: traverse(Student *t) {
    //因为实在 类里面 可以直接访问到数据
     //输出的信息 分了 几行 便于好看
             cout << "学生信息为：" << endl
                  << "    学号：" << ID << "  姓名：" << name << "  年龄：" << age << "  专业：" << major << endl
                  <<"公共课成绩："<<endl
                  << "    数学：" << math << "  英语：" << english << "  体育：" << sport << endl
                  << "专业课成绩：" <<endl
                  <<"     综合英语："<< t->get_zonghe_english() << "  口语英语：" << t->get_spoken_english() <<endl
                  <<endl;
}

 float  English_Student::get_average_score() {
     float av = 0.0;  //来求和  在类里面 可以访问到数据
     av += math; av += sport; av += english;
     av += zonghe_english; av += spoken_english;
    return (av / 5.0) ; //返回平均分 /5.0 为float

 }

 float English_Student::get_main_average() {
     //直接返回 公共课平均分   为float
     return ((math + english + sport) / 3.0);
 }

 float English_Student::get_zonghe_english() {
     return zonghe_english; //返回综合英语的分
 }

 float English_Student::get_spoken_english() {
     return spoken_english;//返回口语英语的分
 }

 string  English_Student::get_major() {
     return major; //返回专业  为string
 }
 ;

/*IT_Student.h*/
#pragma once
#include "Student.h"
#include <string>
class IT_Student :
    public Student
{
public:
    //特有科目成员变量
    float zu_cheng_yuanli;
    float ti_xi_jie_gou;
    float hui_bian;
    string major = "IT_Student";
    //一系列get函数 返回float
    float get_zu_cheng_yuanli();
    float get_ti_xi_jie_gou();
    float get_hui_bian();
    float get_average_score();
    float get_main_average();
    string  get_major();
    IT_Student();
    ~IT_Student();
    void  traverse(Student *t);
    void change();

};

/*IT_Student.cpp*/
#include "IT_Student.h"

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

IT_Student::IT_Student()
{
    cout << "age:" << endl;
    cin >> age;
    getchar();
    cout << "name:";
    cin >> name;
    getchar();
    cout << "ID:" << endl;
    cin >> ID;
    getchar();
    cout << "sport_score:" << endl;
    cin >> sport;
    getchar();
    cout << "math_score:" << endl;
    cin >> math;
    getchar();
    cout << "english_score" << endl;
    cin >> english;
    cout << "zu_cheng_yuanli_score" << endl;
    cin >> zu_cheng_yuanli;
    cout << "ti_xi_jie_gou_score" << endl;
    cin >> ti_xi_jie_gou;
    cout << "hui_bian_score" << endl;
    cin >> hui_bian;
    getchar();
    cout << "录入成功！" << endl;
}

IT_Student::~IT_Student()
{
}

void  IT_Student::change() {
    //公共的信息修改 在 manage 里面 这里来到类里面来修改特有的信息
    cout << "    组成原理：" << endl;
    cin >> zu_cheng_yuanli;
    cout << "    体系结构：" << endl;
    cin >> ti_xi_jie_gou;
    cout << "    汇编语言：" << endl;
    cin >> hui_bian;
    getchar();
}

float IT_Student::get_main_average() {
    return ((math + english + sport) / 3.0);
}

void  IT_Student::traverse(Student *t) {
    //因为实在 类里面 可以直接访问到数据
    //输出的信息 分了 几行 便于好看
            cout << "学生信息为：" << endl
                 << "    学号：" << ID << "  姓名：" << name << "  年龄：" << age << "  专业：" << major << endl
                 <<"公共课成绩："<<endl
                 << "    数学：" <<math << "  英语：" << english << "  体育" << sport << endl
                 << "专业课成绩： "<<endl
                 <<"    组成原理："<< t->get_zu_cheng_yuanli() << "  体系结构：" << t->get_ti_xi_jie_gou() <<"  汇编语言："<<t->get_hui_bian()<< endl
                 <<endl;
    }

float IT_Student::get_average_score() {
    float av = ;
    av += math; av += sport; av += english;
    av += zu_cheng_yuanli; av += ti_xi_jie_gou; av += hui_bian;
    return (av / 6.0);

}

float IT_Student::get_zu_cheng_yuanli() {
    return zu_cheng_yuanli;
}

/*main.cpp*/
**#include "manage_student.h"
#include "Student.h"
#include<iostream>
#include "Math_Student.h"
#include "IT_Student.h"
#include "English_Student.h"
using namespace std;

/*void traverse(Student *head) {
    int index = 1;    // 用于计数第几个学生
    Student *temp = head;
    while (temp != NULL) {  //同样一直到后面没有地址结束
        cout << temp->math;
        temp = temp->next;
    }
}*/

void menu(Student *head,manage_student Chead) {
    int m = ;
    int ID = ;
    int conter = ;
    while () {
        cout << "                         ***************请选择您需要的操作：****************" << endl;
        cout << "                         *              1.  增加学生信息                   *" << endl;
        cout << "                         *              2.  删除学生信息                   *" << endl;
        cout << "                         *              3.  修改学生信息                   *" << endl;
        cout << "                         *              4.  按学号ID查询                   *" << endl;
        cout << "                         *              5.  查询某位学生的平均分           *" << endl;
        cout << "                         *              6.  某个学生的三科平均成绩         *" << endl;
        cout << "                         *              7.  按公共课平均分从高到低排序     *" << endl;
        cout << "                         *              8.  遍历学生信息                   *" << endl;
        cout << "                         *              9.  结束功能并把信息写入文件中     *" << endl;
        cout << "                         *              0.  退出程序                       *" << endl;
        cout << "                         ***************************************************" << endl;
        rewind(stdin);
        cin >> m;
        if (m >= && m < ) {
            switch (m) {
            case : Chead.append_student(head); break;
            case : {cout << "要删除学生信息的学号:";
                cin >> ID;
                head = Chead.delete_student(head, ID, Chead.getlength(head)); }break;
            case : {cout << "需要修改学生信息的同学ID：";
                cin >> ID;
                Chead.change_message(head, ID); }break;
            case : {cout << "按学号查询  请输入需要查询的同学的ID为：";
                cin >> ID;
                Chead.search(head, ID); }break;
            case : {
                cout << "请输入您需要查询学生的平均成绩的ID：";
                    cin >> ID;
                    Chead.get_average_score(head,Chead.getlength(head),ID );
                 }break;
            case : {
                cout << "请输入您需要查询学生的平均成绩的ID：";
                cin >> ID;
                Student *t = head;
                while (t != NULL) {
                    if (t->ID == ID) {
                        cout << "该同学的公共课平均成绩为：" << t->get_main_average() << endl;
                    }t = t->next;
                }
                break;
            }

            case : {
                Chead.rank_average_score(head, Chead.getlength(head));
                cout << "排序成功！"; break;
            }
            case : {
                Student *t = head;
                while (t != NULL) {
                    t->traverse(t);
                    t=t->next;
                }break;
            }
            case : {
                Chead.openfile(head, Chead.getlength(head));
                cout << "写入文件成功！"; break;
            }
            case : {
                Chead.release(head);//结束之前free掉链表
                return; }
            }
        }
        else cout << "输入有错误  请输入0-9的整数"; continue;
    }

/*manage_student.h*/
#pragma once
#include<iostream>
#include "Student.h"

class manage_student
{
public:
    //存入文件  传入头指针和长度
    void  openfile(Student *head, int len);
    //成绩排序   传入头指针和长度
    void rank_average_score(Student *head,int len);
    //修改信息   指定ID找到学生信息 修改 传入头 和 ID
    void change_message(Student *head, int ID);
    //增加信息  传入头就可以
    void append_student(Student *head);
    //删除学生信息   传入头 需要删除学生信息的ID 链表长度
    Student * delete_student(Student *head,int ID,int len);
    //创建链表
    Student * create();
    //搜索查询学生信息 根据ID搜索
    void search(Student *head, int ID);
    //得到链表的长度  传入头  返回链表长度
    int getlength(Student *head);
    //得到平均分  显示平均分
    void get_average_score(Student *head, int len,int ID);
    void release(Student *head);

    manage_student();
    ~manage_student();
};

/*manage_student.cpp*/
#include "manage_student.h"
#include "Student.h"
#include<iostream>
#include "Math_Student.h"
#include "IT_Student.h"
#include "English_Student.h"
#include<string.h>
using namespace std;

#include<fstream>
#include<iomanip>

manage_student::manage_student()
{
}

manage_student::~manage_student()
{

}

Student *  manage_student:: create() {
    int num = ; //来计数 输入的第几个学生
    int temp;  //用来输入选择初始化的学生的专业
    int len = ; //表示链表的长度
    cin >> len;  //也就是初始输入需要添加的学生数目
    Student stu;//用来初始化指针
    Student *pre = &stu;
    Student *c = &stu;
    Student *Head = &stu;  //最后要返回的头指针
    while (num < len) {
        cout << "************您需要添加此学生的专业是？  1：数学系  2：英语系  3：计算机系" << endl;
        cin >> temp;
        if (temp == ) {
            c = new Math_Student;  //一定要new一个**********不然会覆盖之前的
            if (num == ) {         // 千万不能 Math_Student c  这个错误调了几天！！！！！！
                Head = c;   //  头指针的地址
                Head->next = NULL;  //第一个的尾给空
                pre = Head;  //pre指向  前一个 也就是头
            }
            if (num) {
                pre->next = c; //前一个的尾接到下一个的地址
                pre = pre->next; //pre 指向next指针
                pre->next = NULL;  //next指针指向的 弄为空
            }
            ++num;
            continue;
        }
        else if (temp == ) {
            c = new English_Student;
            if (num == ) {
                Head = c;   //  头指针的地址
                Head->next = NULL;  //第一个的尾给空
                pre = Head;  //pre指向  前一个 也就是头
            }
            if (num) {
                pre->next = c; //前一个的尾接到下一个的地址
                pre = pre->next; //pre 指向next指针
                pre->next = NULL;  //next指针指向的 弄为空
            }
            ++num;
            continue;
        }
        else if (temp == ) {
            c = new IT_Student;
            if (num == ) {
                Head = c;   //  头指针的地址
                Head->next = NULL;  //第一个的尾给空
                pre = Head;  //pre指向  前一个 也就是头
            }
            if (num) {
                pre->next = c; //前一个的尾接到下一个的地址
                pre = pre->next; //pre 指向next指针
                pre->next = NULL;  //next指针指向的 弄为空
            }
            ++num;
            continue;
        }
        else {
            cout << "输入有误！请重新输入" << endl; continue;
        }
    }
    return Head;  //把头指针返回到main里 便于取用
}

int manage_student::getlength(Student * head)
    {
        int num = ; //=0 或者 =1 取决于while的判断条件
        Student *t=head;
        while (t->next != ) {    //当head指向后面没有了 它就是NULL  结束
            ++num;
            t = t->next;  //如果head 不是NULL ++num后要把head指针指向最后
        }
    return num;  //返回int长度
    }

void manage_student::search(Student *head,int ID) {
    Student *t = head; //用*t来遍历
    while (t != NULL) {  //只要t不是空 就进入
        if (t->ID == ID) { //如果匹配到 ID
            t->traverse(t); //用基类的指针调用子类的遍历方法
            }t = t->next;
    }
}
void manage_student::release(Student *head) {
    Student *n;   //需要一个指针存着下一个地址
    while (head != NULL) {
        n = head->next;  //把n指向下一块要释放的地址
        free(head);
        head = n;   //然后再把head从前一个地址移到下一个地址
    }
}
void manage_student::append_student(Student *head) {
    Student *c = head;  //都用基类的指针来操作
    Student *t = head;
    int temp;
    while (t->next != NULL) {
        t = t->next;  //把t移动到最后一块链表
    }
    cout << "************您需要添加此学生的专业是？  1：数学系  2：英语系  3：计算机系" << endl;
    cin >> temp;
    if (temp == ) {
        c = new Math_Student;  //一定要new一个
            t->next = c; //前一个的尾接到下一个的地址
            t = t->next; //pre 指向next指针
            t->next = NULL;  //next指针指向的 弄为空
    }
    else if (temp == ) {
            c = new English_Student;  //一定要new一个
            t->next = c; //前一个的尾接到下一个的地址
            t = t->next; //pre 指向next指针
            t->next = NULL;  //next指针指向的 弄为空
    }
    else if (temp == ) {
            c = new IT_Student;  //一定要new一个
            t->next = c; //前一个的尾接到下一个的地址
            t = t->next; //pre 指向next指针
            t->next = NULL;  //next指针指向的 弄为空
    }
    else {
        cout << "输入有误！请重新输入" << endl;
    }
} 

Student * manage_student::delete_student(Student *head, int ID,int len)
{
    //用*t来遍历
    Student *t = head;
    Student *temp;//临时指针
    for (int i = ; i < (len - ); ++i) {
        if (i == ) {  //如果就是第一块链表  需要特殊处理  因为头Head会变
            if (head->ID == ID) { head = head->next;  delete t;  return head; } //一定要返回一个新的头Head
            if ((t->next)->ID == ID) {  //如果是第二块链表匹配
                temp = t->next;  //把第一块跟第三块连接起来
                t->next = (t->next)->next;
                delete temp; return head; //delete调 第二块 返回头Head
            }
        }
        if (i != ) {
            if ((t->next)->ID == ID) {  //如果遍历的不是第一块了，操作都一样
                temp = t->next;  //前一块的next
                t->next = (t->next)->next; //前后连接
                delete temp; return head; //删掉中间
            }t = t->next;
        }
    }cout << "删除成功！" << endl; return head; //返回头指针
}

void manage_student::change_message(Student *head, int ID) {
    Student *t = head;
    while (t!= NULL) {
        if (t->ID == ID) {//ID匹配  进入
            //  匹配属于数学系
            if (t->get_major() == "Math_Student") {
                //在此处修改公共的信息
                cout << "*******请输入要修改的学生信息：" << endl;
                cout << "          ID：" << endl;
                cin >> t->ID;
                cout << "          姓名：" << endl;
                cin >> t->name;
                cout << "          年龄：" << endl;
                cin >> t->age;
                cout << "          数学：" << endl;
                cin >> t->math;
                cout << "          英语：" << endl;
                cin >> t->english;
                cout << "          体育：" << endl;
                cin >> t->sport;
                t->change();  //然后再去子类里面调用change修改特有的成员变量
            }
            if (t->get_major() == "English_Student") {
                cout << "*******请输入要修改的学生信息：" << endl;
                cout << "          ID：" << endl;
                cin >> t->ID;
                cout << "          姓名：" << endl;
                cin >> t->name;
                cout << "          年龄：" << endl;
                cin >> t->age;
                cout << "          数学：" << endl;
                cin >> t->math;
                cout << "          英语：" << endl;
                cin >> t->english;
                cout << "          体育：" << endl;
                cin >> t->sport;
                t->change();
            }
            if (t->get_major() == "IT_Student") {
                cout << "*******请输入要修改的学生信息：" << endl;
                cout << "          ID：" << endl;
                cin >> t->ID;
                cout << "          姓名：" << endl;
                cin >> t->name;
                cout << "          年龄：" << endl;
                cin >> t->age;
                cout << "          数学：" << endl;
                cin >> t->math;
                cout << "          英语：" << endl;
                cin >> t->english;
                cout << "          体育：" << endl;
                cin >> t->sport;
                t->change();
            }

            cout << "信息修改完成！"<<endl; return;
        }

        t = t->next;
    }
    cout << "对不起！查无此人，请重新确认学号是否输入正确，谢谢！"<<endl;
}

void manage_student::rank_average_score(Student *head,int len) {
    Student *t = head;  //用*t来 遍历
    Student *pre = head;//把前面的存着 来跟后面的比较
    t = t->next; //t往后移动一个
    int ID;
    char name[];
    float math,  english, sport;
    for (int i = ; i < (len - ); ++i) {
        while (t != NULL) {
            //如果后面的平均分比前面的平均分高 就进入
            if ( t->get_average_score() >pre->get_average_score() ){
                strcpy_s(name, t->name); strcpy_s(t->name, pre->name); strcpy_s(pre->name, name);
                ID = t->ID; t->ID = pre->ID; pre->ID = ID;
                math = t->math; t->math = pre->math; pre->math = math;
                sport = t->sport; t->sport = pre->sport; pre->sport = sport;
                english = t->english; t->english = pre->english; pre->english = english;
            }
            t = t->next;
            //t每次循环完了之后 就把pre后移一个 t接在pre的后面
        }pre = pre->next; t = pre->next;
    }
}

void manage_student::openfile(Student *head, int len) {
    //同样用t遍历
    Student *t = head;
    ofstream ofile;               //定义输出文件
    ofile.open("D:\\学生信息");     //作为输出文件打开
    //for循环把链表 里面的信息写入文件
    for (int i = ; i < len; ++i) {
        //判断系别  因为每个专业的成员不一样
        if (t->get_major() == "Math_Student") {
            ofile << "录入的各学生的信息如下：  " << endl;
            ofile << "  基本信息：" << "  学号" << t->ID << "  姓名：" << t->name << "  年龄：" << t->age << "  专业：" << t->get_major() << endl
                << "  公共课成绩：" << "  数学：" << t->math << "  英语：" << t->english << "  体育：" << t->sport << endl
                << "  专业课成绩：" << "  实变函数" << t->get_shi_bian_fun() << "  泛函分析：" << t->get_fan_han_fen_xi() << "  微分几何" << t->get_wei_fen_jihe() << endl;
            t = t->next; continue;
        }
    if (t->get_major() == "English_Student") {
        ofile << "录入的各学生的信息如下：  " << endl;
        ofile << "  基本信息：" << "  学号" << t->ID << "  姓名：" << t->name << "  年龄：" << t->age << "  专业：" << t->get_major() << endl
            << "  公共课成绩：" << "  数学：" << t->math << "  英语：" << t->english << "  体育：" << t->sport << endl
            << "  专业课成绩：" << "  综合英语：" << t->get_zonghe_english() << "  口语英语：" << t->get_spoken_english() << endl;
            t = t->next; continue;
        }
        if (t->get_major() ==  "IT_Student") {
            ofile << "录入的各学生的信息如下：  " << endl;
            ofile << "  基本信息：" << "  学号" << t->ID << "  姓名：" << t->name << "  年龄：" << t->age << "  专业：" << t->get_major() << endl
                << "  公共课成绩：" << "  数学：" << t->math << "  英语：" << t->english << "  体育：" << t->sport << endl
                << "  专业课成绩：" << "  组成原理：" << t->get_zu_cheng_yuanli() << "  体系结构：" << t->get_ti_xi_jie_gou() << "  汇编语言：" << t->get_hui_bian() << endl;
            t = t->next; continue;
        }
    }
    ofile.close();
    return ;
}

void manage_student::get_average_score(Student *head, int len,int ID) {
    Student *t = head; //用t遍历
    for (int i = ; i < len; ++i) {
        if (t->ID == ID) {
            //用基类的指针调用子类的函数  返回平均分 输出
            cout << "该学生的平均成绩为：" << t->get_average_score() << endl; return;
        }
        t = t->next;
    }
    cout << "请确认您输入的ID是否有误" << endl;
}
;

}

void main() {
    cout << "欢迎进入学生管理系统！请输入需要添加的学生数： "<<endl;
    Student temp; //用来初始化指针
    Student *Head=&temp;
    Student *t=&temp;
    int len;
    manage_student Chead;
    Head=Chead.create();//把头地址传回来给Head 指向的是第一个类stu

    menu(Head, Chead); //调用菜单函数

    system("pause");
    return;
}

float IT_Student::get_ti_xi_jie_gou() {
    return ti_xi_jie_gou;
}

float IT_Student::get_hui_bian() {
    return hui_bian;
}

string  IT_Student::get_major() {
    return major;
}
;

*/
#include "Student.h"
#include<iostream>

Student::Student()
{
}

Student::~Student()
{
}

//这些函数都是假的  真正实现在子类里面
float  Student::get_average_score() {
    return ;
}

float Student::get_main_average() {
    return ;
}

void  Student::traverse(Student *t) {
    cout << "我在Student 里面" << endl;
}

 float Student:: get_shi_bian_fun() {
     return ;
}

 float Student::get_fan_han_fen_xi() {
     return ;
}

 float Student::get_wei_fen_jihe() {
     return ;
}

 float Student::get_zonghe_english() {
     return ;
  }

 float Student::get_spoken_english() {
     return ;
  }

 float Student::get_zu_cheng_yuanli() {
     return ;
  }

 float Student::get_ti_xi_jie_gou() {
     return ;
  }

 float Student::get_hui_bian() {
     return ;
  }

 string  Student::get_major() {
     return ;
 }

 void Student::change() {

 }
;