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graduateManager.h

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+#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