#pragma once
#pragma once
/*************************************************
Copyright (C), 2010, Tyut
File name:     GradateManager.h
Author: gaobaolu      Version: 1.0     Date: 2010.6.28
Description:   研究生管理类
*************************************************/
//#ifndef UNDERGRADUATE_MANAGER_H
#define UNDERGRADUATE_MANAGER_H
#include <iostream>
#include <string>
#include <fstream>
#include"graduate.h"
using namespace std;
/* Define a Class : GradateManager 研究生管理类*/
class GradateManager
{
private:
    int top; //记录指针
    Graduate graduates[100]; //研究生记录
public:
    GradateManager();//构造函数,将Undergraduate.txt读到undergraduates[]中  
    int queryByNo(string sno);//按研究生号查找 //找到：返回数组下标//没找到：返回-1
    void clearStudent();  //删除所有研究生信息    
    int addStudent(Graduate s); //添加研究生,需要先查找是否存在 
    int modifyStudent(string sno);  //修改学生信息 ,需要先查找是否存在
    int deleteStudent(string sno);//删除研究生，删除前先查找其是否存在 
    int queryStudent(string sno);//查找研究生,查到则显示,否则提示未查到   
    void displayAll();//输出所有研究生信息
    void dataManage(); //研究生库维护
    void dataSave();
    void dataRead();
    ~GradateManager();//析构函数,将undergraduates[]写入Undergraduate.txt文件中
};
//构造函数,将Undergraduate.txt读到undergraduates[]中    
GradateManager::GradateManager()
{
    dataRead();
}
//按研究生号查找
//找到：返回数组下标
//没找到：返回-1 
int GradateManager::queryByNo(string sno)
{
    for (int i = 0; i <= top; i++)
        if (graduates[i].getStudentNo() == sno)
            return i;
    return -1;
}
//删除所有本科生信息 
void GradateManager::clearStudent()
{
    top = -1;
}
//添加研究生,需要先查找是否存在
int GradateManager::addStudent(Graduate s)
{
    int p = queryByNo(s.getStudentNo());
    if (p == -1)
    {
        top++;
        graduates[top] = s;
        dataSave();//保存       
        return 1;
    }
    else
    {
        cout << "--------->此学生已经存在 !<----------" << endl << endl;
        return 0;
    }
}
//修改研究生，删除前先查找其是否存在
int GradateManager::modifyStudent(string  sno)
{
    int p = queryByNo(sno);
    if (p == -1)
    {
        cout << "--------->此学生不存在 !<----------" << endl << endl;
        return 0;
    }
    else
    {
        cout << "请输入该生的新信息: " << endl << endl;
        graduates[p].inputData();
        dataSave();//保存 
        return 1;
    }

}
//删除研究生，删除前先查找其是否存在 
int GradateManager::deleteStudent(string sno)
{
    int p = queryByNo(sno);
    if (p == -1)
    {
        cout << "--------->此学生不存在 !<----------" << endl << endl;
        return 0;
    }
    else
    {
        for (int i = p; i < top; i++)
            graduates[i] = graduates[i + 1];
        top--;
        cout << "--------->删除完成!<----------" << endl << endl;
        dataSave();//保存       
        return 1;
    }
}
//查找研究生
int GradateManager::queryStudent(string sno)
{
    int p = queryByNo(sno);
    if (p == -1)
    {
        cout << "--------->此学生不存在 !<----------" << endl << endl;
        return 0;
    }
    else
    {
        cout << "--------->此学生存在:<----------" << endl << endl;
        graduates[p].displayDetails();
        return 1;
    }
}
//输出所有研究生信息
void GradateManager::displayAll()
{
    for (int i = 0; i <= top; i++)
    {
        cout << "--------第" << i << "个学生情况----------" << endl << endl;
        graduates[i].displayDetails();

    }
}
//析构函数,将undergraduates[]写入Undergraduate.txt文件中
GradateManager::~GradateManager()
{
    dataSave();
}
void GradateManager::dataManage()
{
    int choice = 1;
    string sstudentNo;
    Graduate s;

    while (choice != 0)
    {
        cout << "********************************************" << endl;
        cout << "\t\t研究生维护\n";
        cout << "^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^" << endl;
        cout << "\n \t\t 1:新增 ";
        cout << "\n \t\t 2:修改 ";
        cout << "\n \t\t 3:删除 ";
        cout << "\n \t\t 4:查找 ";
        cout << "\n \t\t 5:显示 ";
        cout << "\n \t\t 6:全部删除 ";
        cout << "\n \t\t 0:退出 ";
        cout << endl;
        cout << "*********************************************" << endl;
        cout << "请选择：" << endl;
        cin >> choice;
        switch (choice)
        {
        case 1:
            s.inputData();
            addStudent(s);
            break;
        case 2:
            cout << " 请输入学号:";
            cin >> sstudentNo;
            modifyStudent(sstudentNo);
            break;
        case 3:
            cout << " 请输入学号:";
            cin >> sstudentNo;
            deleteStudent(sstudentNo);
            break;
        case 4:
            cout << " 请输入学号:";
            cin >> sstudentNo;
            queryStudent(sstudentNo);
            break;
        case 5:
            displayAll();
            break;
        case 6:
            clearStudent();
            break;
        default:
            break;
        }
    }
}
void GradateManager::dataSave()//存储资料函数,将read[]写入Undergraduate.txt文件中
{
    fstream file("C:\\Undergraduate.dat", ios::out);
    for (int i = 0; i <= top; i++)
        file.write((char*)&graduates[i], sizeof(graduates[i]));
    file.close();
}
void GradateManager::dataRead() //构造函数,将Undergraduate.txt读到read[]中
{
    Graduate s;
    top = -1;
    fstream file("C:\\graduate.dat", ios::in);
    while (1)
    {
        file.read((char*)&s, sizeof(s));
        if (!file) break;
        top++;
        graduates[top] = s;
    }
    file.close();
}
//#endif //UNDERGRADUATE_MANAGER_H