1.系统分析
本系统的用户分为普通用户和管理员两类，其中普通用户包括教师和学生。普通用户只能对自己的信息进行查询与修改，管理员则拥有所有功能权限。
1.1模块划分
学生选课系统，在登录模块之后，根据系统用户的身份不同划分为三个模块，即：学生模块、教师模块和管理员模块。
1.2功能模块描述
（1）登录模块
登录模块用于用户身份选择与用户登录，完成基本的验证。根据所填信息进行判断，提示“登录成功”、“用户名不存在”或者“密码错误”的信息。
（2）学生模块
学生登录之后，可以查看课程、选课以及修改密码等功能。
（3）教师模块
教师登录之后，可以查看自己所教课程的信息，以及选择该课程的学生信息，可以修改个人密码。
（4）管理员模块
管理员登录之后，可以对该系统进行管理，原则上拥有所有用户的全部权限。主要功能有添加、修改及删除课程信息，设置选课、退课时间，查看课程信息和修改密码等。
2.系统设计
【系统流程图】
【类图】
3.测试数据
（1）课程信息测试数据，见文件“Subject.txt”；
（2）学生信息测试数据，见文件“Student.txt”；
（3）学生账号密码测试数据，见文件“studentIP.txt”；
（4）教师账号密码测试数据，见文件“TeacherIP.txt”；
（5）管理员账号密码测试数据，见文件“ManagerIP.txt”；
（6）学生选课情况测试数据，保存于文件“StSubject.txt”；
（7）选课时间测试数据，见文件“TimeSelect.txt”；
（8）退课时间测试数据，见文件“TimeQuit.txt”。
4.文件说明
5.系统效果图【部分】
【登录】
【学生】
【教师】
【管理员】
6.源代码
【运行前需要自行新建所需文件，必要时自己加上测试数据】
#include <iostream>
#include <fstream>
#include <string>
#include <cstdlib>
#include <cstring>
#include <conio.h>
#include <ctime>
#include <iomanip>
using namespace std;
class Student;
//账号密码
class IdPw
{
public:
IdPw(){}
~IdPw(){}
string id; //账号
string password; //密码
IdPw *next;
};
//课程
class Subject
{
public:
Subject(){}
~Subject(){}
string subID; //课程号
string subName; //课程名
string subTearcherID; //任课教师工号
string subTeacher; //任课老师
string subCate; //课程类型
float mark; //学分
int maxNum; //课程最大容量
int okNum; //选此课的人数
Subject *next;
Student *head_SubSt; //选此课的学生信息
};
//基类
class Base
{
public:
Base(){}
~Base(){}
void readShowSub(); //显示可选课程
IdPw ip;
};
//学生
class Student : virtual public Base
{
public:
Student(){}
~Student(){}
void querySub(); //查询已选课程
void selecSub(); //选课
void quitSub(); //退课
void modifyPw(); //修改密码
int n; //已选课程数
string stNo; //学号
string name; //姓名
string college; //学院
string major; //专业
string clas; //班级
Student *next;
Subject *head_stSub; //所选课程
};
//教师
class Teacher : virtual public Base
{
public:
Teacher(){}
~Teacher(){}
void querySubInfo(); //查询所教课程信息
void modifyPw(); //修改密码
};
//管理员
class Manager : public Student, public Teacher
{
public:
Manager(){}
~Manager(){}
void addSub(); //添加课程
void deleteSub(); //删除课程
void modifySub(); //修改课程信息
void setSelSubTime(); //设置选课时间
void setQuitSubTime(); //设置退课时间
void modifyPwM(); //修改密码
void ShowSub();
void writeSub(Subject *head_sub);
void writeAddSub(Subject *p);
};
class Time
{
public:
int year;
int month;
int day;
};
/**声明对象**/
Student st;
Teacher tea;
Manager ma;
Time start, endt;
/** Base **/
//读取课程文件
Subject* readSub()
{
Subject *head_sub = new Subject;
head_sub ->next = NULL;
Subject *p, *q;
q = head_sub;
ifstream in("Subject.txt");
if (!in)
{
cout << "\n\n\t\t\t\tCan't open \"Subject.txt\"!";
exit(0);
}
p = new Subject;
while (in >> p ->subID >> p ->subName >> p ->mark >> p ->okNum >> p ->maxNum >> p ->subTeacher >> p ->subTearcherID >> p ->subCate)
{
p ->next = NULL;
q ->next = p;
q = p;
p = new Subject;
}
in.close();
return head_sub;
}//Base::readSub
//显示可选课程
void Base::readShowSub()
{
Subject *head_sub = new Subject;
head_sub ->next = NULL;
head_sub = readSub();
Subject *p = head_sub ->next;
cout << setiosflags(ios_base::left) << setw(4) << "序号" << setw(13) << " 课程编号" << setw(16) << " 课程名" << setw(6) << "学分" << setw(7) << "剩余" << setw(10) << "最大容量" << setw(10) <<"任课老师" << "课程属性\n";
cout << "===========================================";
cout << "====================================" << endl;
int i = 1;
while (p)
{
if (p ->maxNum - p ->okNum > 0)
cout << setiosflags(ios_base::left) << " " << setw(4) << i++ << setw(14) << p ->subID << setw(14) << p ->subName << setw(6) << p ->mark << setw(8) << p ->maxNum - p ->okNum << setw(10) << p ->maxNum << setw(10) << p ->subTeacher << setw(10) <<p ->subCate << endl << endl;
p = p ->next;
}
}//Base::readShowSub
//读取账号密码文件
IdPw * read(string fname)
{
IdPw *head_IP = new IdPw;
IdPw *q = head_IP;
ifstream in(fname);
if (!in)
{
cout << "Can't open the file!" << endl;
exit(0);
}
IdPw *p = new IdPw;
while (in >> p ->id >> p ->password)
{
p ->next = NULL;
q ->next = p;
q = p;
p = new IdPw;
}
in.close();
return head_IP;
}//read()
//写入账号密码文件
void write(IdPw *head_ip, string fname)
{
IdPw *p = head_ip ->next;
head_ip ->next = NULL;
ofstream ou(fname);
if (!ou)
{
cout << "Can't open the file!" << endl;
exit(0);
}
while(p)
{
ou << p ->id << " " << p ->password << endl;
p = p ->next;
}
ou.close();
}//write
/** Student **/
//修改密码
void Student::modifyPw()
{
IdPw *head_ip = new IdPw;
head_ip ->next = NULL;
string pw1, pw2, pw3;
int flag = 1;
head_ip = read("studentIP.txt");
if (head_ip == NULL)
{
cout << "\n\n\t\t\t\t文件打开错误，密码修改失败！";
return ;
}
IdPw *p = head_ip ->next;
cout << "\n\t\t\t\t请输入原密码：";
cin >> pw1;
cout << "\n\n\t\t\t\t请输入新密码：";
cin >> pw2;
cout << "\n\n\t\t\t\t再次输入新密码：";
cin >> pw3;
p = head_ip ->next;
while (p)
{
if (p ->id == st.ip.id)
{
if (p ->password == pw1)
{
if (pw2 == pw3)
{
p ->password = pw2;
cout << "\n\n\t\t\t\t密码修改成功！";
cout << " *按Enter键返回！*" << endl;
write(head_ip, "studentIP.txt");
}
else
{
cout << "\n\n\t\t\t\t两次新密码不一致！";
}
flag = 0;
}
}
if (flag == 0)
break;
p = p ->next;
}
if (flag == 1)
cout << "\n\n\t\t\t\t原密码输入错误！";
}//Student::modifyPw()
//读取选课时间
void readTime1()
{
ifstream in("TimeSelect.txt");
if (!in)
{
cout << "Can't open \"TimeSelect.txt\"!";
exit(0);
}
in >> start.year >> start.month >> start.day;
in >> endt.year >> endt.month >> endt.day;
}//readTime1()
//读取退课时间
void readTime2()
{
ifstream in("TimeQuit.txt");
if (!in)
{
cout << "Can't open \"TimeQuit.txt\"!";
exit(0);
}
in >> start.year >> start.month >> start.day;
in >> endt.year >> endt.month >> endt.day;
}//readTime2()
/** 计算两个日期的“时间差” **/
int diffDay(Time t1, Time t2)
{
if (t1.month == t2.month)
return t2.day-t1.day;
return 31-t1.day+t2.day;
}//diffDay(Time t1, Time t2)
/** 读取学生-课程信息文件 **/
Student* readStSub()
{
Student *head_st = new Student;
head_st ->next = NULL;
Student *p, *q;
p = new Student;
q = head_st;
q ->next = NULL;
p ->head_stSub = new Subject;
p ->head_stSub ->next = NULL;
Subject *s, *t;
t = p ->head_stSub;
t ->next = NULL;
// 读取学生选课文件
ifstream in("StSubject.txt");
if (!in)
{
cout << "Can't open \"StSubject.txt\"!";
exit(0);
}
while (in >> p ->stNo >> p ->n)
{
for (int i = 0; i < p ->n; i++)
{
s = new Subject;
in >> s ->subID;
s ->next = NULL;
t ->next = s;
t = s;
}
p ->next = NULL;
q ->next = p;
q = p;
p = new Student;
p ->head_stSub = new Subject;
t = p ->head_stSub;
t ->next = NULL;
}//while
in.close();
return head_st;
}//readStSub()
/** 更新学生-课程信息文件 **/
void writeStSub(Student *head_st)
{
Student *p;
Subject *s;
ofstream ou2("StSubject.txt");
if (!ou2)
{
cout << "Can't open \"StSubject.txt\"!";
exit(0);
}
p = head_st ->next;
while (p)
{
//该学生所选的课程数加一
if (p ->stNo == st.ip.id)
p ->n++;
ou2 << p ->stNo << " " << p ->n;
s = p ->head_stSub ->next;
while (s)
{
ou2 << " " << s ->subID;
s = s ->next;
}
ou2 << endl;
p = p ->next;
}
ou2.close();
}//writeStSub()
/** 学生选课 **/
void Student::selecSub()
{
//判断是否是选课时间
Time nowTime;
time_t t = time(NULL);
tm *tt = localtime(&t);
nowTime.year = tt ->tm_year+1900;
nowTime.month = tt ->tm_mon+1;
nowTime.day = tt ->tm_mday;
readTime1();
int x = diffDay(start, endt);
int y = diffDay(start, nowTime);
if (x >= y)
{
Subject *head_sub = new Subject;
head_sub ->next = NULL;
head_sub = readSub();
Subject *a = head_sub ->next;
//显示可选课程
readShowSub();
int c;
cout << "\n 请输入要选择的课程（序号）：";
cin >> c;
//根据输入的序号定位课程
int i = 1;
int flag = 0;
while (a)
{
if (c == i)
{
flag = 1;
break;
}
if (a ->maxNum - a ->okNum > 0)
i++;
a = a ->next;
}
if (flag == 1)
{
/** 判断是否已选此课，并更新信息 **/
Student *head_st = new Student;
head_st ->next = NULL;
head_st = readStSub();
Student *p;
p = new Student;
p ->head_stSub = new Subject;
p ->next = NULL;
Subject *s, *t;
//判断该学生本学期是否已选本课程
int flag1 = 0, flag2 = 1;
p = head_st ->next;
while (p)
{
if (p ->stNo == st.ip.id)
{
flag1 = 1;
s = p ->head_stSub ->next;
t = p ->head_stSub;
while (s)
{
if (s ->subID == a ->subID)
{
flag2 = 0;
break;
}
t = s;
s = s ->next;
}
break;
}//if
p = p ->next;
}//while
//更新学生-课程文件
if (flag1 == 1 && flag2 == 1)
{
//将新选课程加入链表
s = new Subject;
s ->subID = a ->subID;
s ->next = NULL;
t ->next = s;
writeStSub(head_st);
//修改课程信息
a ->okNum++;
ma.writeSub(head_sub);
//更新课程_学生信息
Student *head_st2 = new Student;
Student *e = new Student, *r;
r = head_st2;
r ->next = NULL;
//读取学生基本信息
ifstream in2("Student.txt");
if (!in2)
{
cout << "Can't open \"Student.txt\"!";
exit(0);
}
while (in2 >> e ->stNo >> e ->name >> e ->college >> e ->major >> e ->clas)
{
e ->next = NULL;
r ->next = e;
r = e;
e = new Student;
}
in2.close();
//将学生信息加入到课程-学生文件
r = head_st2 ->next;
while (r)
{
if (r ->stNo == st.ip.id)
break;
r = r ->next;
}
string ssss = a ->subID + ".txt";
ofstream ou(ssss, ios::app);
if (!ou)
{
cout << "Can't open \"" << ssss << "\"!";
exit(0);
}
ou << r ->stNo << " " << r ->name << " " << r ->college << " " << r ->major << " " << r ->clas << endl;
ou.close();
cout << "选课成功！";
cout << " *按Enter键返回！*" << endl;
}//if
else
{
cout << " 你本学期已选本课程！" << endl;
}
}//if
else
{
cout << " 输入错误！" << endl;
}
}//if (x >= y)
else
cout << "现在不是选课时间！";
}//Student::selecSub()
/** 查看已选课程 **/
void Student::querySub()
{
Subject *head_Sub = new Subject;
head_Sub ->next = NULL;
Subject *p, *s;
Student *head_st =new Student;
head_st ->next = NULL;
Student *sp;
head_Sub = readSub();
head_st = readStSub();
sp = head_st ->next;
int i = 1;
cout << "序号 课程号 " << " 课程名 " << " 学分 " << " 任课教师 " << " 课程属性" << endl;
cout << "===========================================";
cout << "===================================" << endl;
while (sp)
{
if (sp ->stNo == st.ip.id)
{
s = sp ->head_stSub ->next;
while (s)
{
p = head_Sub;
while (p)
{
if (p ->subID == s ->subID)
{
cout << " " << setiosflags(ios_base::left) << setw(6) << i++ << setw(13) << p ->subID << setw(18) << p ->subName << setw(6) << p ->mark << setw(10) << p ->subTeacher << p ->subCate << endl << endl;
break;
}
p = p ->next;
}//while
s = s ->next;
}//while
break;
}//if
sp = sp ->next;
}//while
}//Student::querySub()
/** 读取课程-学生文件 **/
Student * readSubSt(string s)
{
Student *head = new Student;
Student *r = new Student, *q;
q = head;
q ->next = NULL;
ifstream in(s);
if (!in)
{
cout << "Can't open \"" << s << "\"!";
exit(0);
}
while (in >> r ->stNo >> r ->name >> r ->college >> r ->major >> r ->clas)
{
r ->next = NULL;
q ->next = r;
q = r;
r = new Student;
}
in.close();
return head;
}//readSubSt
/** 退课 **/
void Student::quitSub()
{
//判断是否是选课时间
Time nowTime;
time_t t = time(NULL);
tm *tt = localtime(&t);
nowTime.year = tt ->tm_year+1900;
nowTime.month = tt ->tm_mon+1;
nowTime.day = tt ->tm_mday;
readTime2();
int x = diffDay(start, endt);
int y = diffDay(start, nowTime);
if (x >= y)
{
//显示已选课程
querySub();
int c;
cout << "请选择退选课的序号：";
cin >> c;
//定位课程
Student *head_st = new Student;
head_st ->next = NULL;
Student *p;
head_st = readStSub();
int i = 1;
Subject *s;
string subId;
p = head_st ->next;
while (p)
{
if (p ->stNo == st.ip.id)
{
s = p ->head_stSub ->next;
while (s)
{
i++;
s = s ->next;
}
break;
}
}//while
if (c <= i && c > 0)
{
i = 1;
//更新学生-课程文件
ofstream ou("StSubject.txt");
if (!ou)
{
cout << "Can't open \"StSubject.txt\"!";
exit(0);
}
p = head_st ->next;
while (p)
{
if (p ->stNo == st.ip.id)
{
p ->n--;
ou << p ->stNo << " " << p ->n;
s = p ->head_stSub ->next;
while (s)
{
if (i != c)
ou << " " << s ->subID;
else
subId = s ->subID;
i++;
s = s ->next;
}
}//if
else
{
ou << p ->stNo << " " << p ->n;
s = p ->head_stSub ->next;
while (s)
{
ou << " " << s ->subID;
s = s ->next;
}
}
ou << endl;
p = p ->next;
}//while
ou.close();
//更新课程文件
Subject *head_sub = new Subject;
head_sub ->next = NULL;
head_sub = readSub();
s = head_sub ->next;
while (s)
{
if (s ->subID == subId)
{
s ->okNum--;
break;
}
s = s ->next;
}
ofstream ou2("Subject.txt");
if (!ou2)
{
cout << "Can't open the file!";
exit(0);
}
s = head_sub ->next;
while (s)
{
ou2 << s ->subID << " " << s ->subName << " " << s ->mark << " " << s ->okNum << " " << s ->maxNum << " " << s ->subTeacher << " " << s ->subTearcherID << " " << s ->subCate << endl;
s = s ->next;
}
ou2.close();
//更新课程-学生文件
Student *head_st2 = new Student;
head_st2 ->next = NULL;
string sss = subId + ".txt";
head_st2 = readSubSt(sss);
ofstream ou3(sss);
if (!ou3)
{
cout << "Can't open the file!";
exit(0);
}
p = head_st2 ->next;
while (p)
{
if (p ->stNo != st.ip.id)
ou << p ->stNo << " " << p ->name << " " << p ->college << " " << p ->major << " " << p ->clas << endl;
p = p ->next;
}
ou3.close();
cout << "退课成功！";
cout << " *按Enter键返回！*" << endl;
}//if
else
{
cout << "输入错误！";
}
}//if
else
{
cout << "现在不是退课时间！";
}
}//Student::quitSub()
/** Teacher **/
//修改密码
void Teacher::modifyPw()
{
IdPw *head_ip = new IdPw;
head_ip ->next = NULL;
string pw1, pw2, pw3;
int flag = 1;
head_ip = read("TeacherIP.txt");
if (head_ip == NULL)
{
cout << "\n\n\t\t\t\t文件打开错误，密码修改失败！";
return ;
}
IdPw *p = head_ip ->next;
cout << "\n\t\t\t\t请输入原密码：";
cin >> pw1;
cout << "\n\n\t\t\t\t请输入新密码：";
cin >> pw2;
cout << "\n\n\t\t\t\t再次输入新密码：";
cin >> pw3;
p = head_ip ->next;
while (p)
{
if (p ->id == tea.ip.id)
{
if (p ->password == pw1)
{
if (pw2 == pw3)
{
p ->password = pw2;
cout << "\n\n\t\t\t\t密码修改成功！";
write(head_ip, "TeacherIP.txt");
}
else
{
cout << "\n\n\t\t\t\t两次新密码不一致！";
}
flag = 0;
}//if
}
if (flag == 0)
break;
p = p ->next;
}
if (flag == 1)
cout << "\n\n\t\t\t\t原密码输入错误！";
}//Teacher::modifyPw
/** 查询所教课程信息 **/
void Teacher::querySubInfo()
{
Subject *head_sub = new Subject;
head_sub ->next = NULL;
Student *head_SubSt = new Student;
head_SubSt ->next = NULL;
head_sub = readSub();
Subject *p = head_sub ->next;
cout << " 序号" << " 课程编号\t" << "课程名\t" << " 学分 " << "选课人数" << " 最大容量 " << "任课老师" << " 课程属性\n";
cout << "===========================================";
cout << "===================================" << endl;
int i = 1;
while (p)
{
if (p ->subTearcherID == tea.ip.id)
cout << setw(3) << i++ << "."<< setw(13) << p ->subID << setw(15) << p ->subName << setw(4) << p ->mark << setw(8) << p ->okNum << setw(12) << p ->maxNum << setw(12) << p ->subTeacher << p ->subCate << endl << endl;
p = p ->next;
}
string c;
cout << "\n *1-查看详细信息 0-返回*" << endl << endl;
cout << " 请选择：";
cin >> c;
cout << endl;
if (c == "1")
{
cout << " *请选择科目序号： ";
int c2, t = 1;
cin >> c2;
int flag = 0;
p = head_sub ->next;
while (p)
{
if (tea.ip.id == p ->subTearcherID)
{
if (t == c2)
{
flag = 1;
break;
}
t++;
}
p = p ->next;
}
if (flag == 1)
{
string subId = p ->subID + ".txt";
head_SubSt = readSubSt(subId);
Student *head_new = new Student, *p1, *t, *r, *s;
p1 = head_new ->next = head_SubSt ->next;
p1 = p1 ->next;
head_new ->next ->next = NULL;
while (p1)
{
t = p1 ->next;
r = head_new ->next;
s = head_new;
while (r!=NULL && p1 ->stNo > r ->stNo)
{
s = r;
r = r ->next;
}
s ->next = p1;
p1 ->next = r;
p1 = t;
}
cout << "序号 " << " 学号 " << " 姓名 " << " 学院 " << " 专业班级" << endl;
cout << "===========================================";
cout << "===================================" << endl;
int t2 = 1;
Student *sp = head_new ->next;
while (sp)
{
cout << " " << setiosflags(ios_base::left) << setw(6) << t2++ << setw(12) << sp ->stNo << setw(10) << sp ->name << setw(12) << sp ->college << sp ->major << sp ->clas << endl << endl;
sp = sp ->next;
}
}//if
else
{
cout << "*输入错误！ ";
}
}//if
else if (c != "0")
{
cout << "*输入错误！ ";
}
cout << " 按Enter返回！";
}//Teacher::querySubInfo()
/** Manager **/
/** 写入课程文件 **/
void Manager::writeSub(Subject *head_sub)
{
Subject *p;
ofstream ou("Subject.txt");
if (!ou)
{
cout << "\n\n\t\t\t\tCan't open the file!";
exit(0);
}
p = head_sub ->next;
while (p)
{
ou << p ->subID << " " << p ->subName << " " << p ->mark << " " << p ->okNum << " " << p ->maxNum << " " << p ->subTeacher << " " << p ->subTearcherID << " " << p ->subCate << endl;
p = p ->next;
}
ou.close();
}//Manager::writeSub
/** 写入添加课程文件 **/
void Manager::writeAddSub(Subject *p)
{
ofstream ou("Subject.txt", ios::app);
if (!ou)
{
cout << "\n\n\t\t\t\tCan't open the file!";
exit(0);
}
ou << p ->subID << " " << p ->subName << " " << p ->mark << " " << p ->okNum << " " << p ->maxNum << " " << p ->subTeacher << " " << p ->subTearcherID << " " << p ->subCate << endl;
ou.close();
}//Manager::writeAddSub
/** 添加课程 **/
void Manager::addSub()
{
ifstream in("Subject.txt");
if (!in)
{
cout << "Can't open the file!\n";
exit(0);
}
Subject *head_sub = new Subject;
head_sub ->next = NULL;
head_sub = readSub();
Subject *q;
Subject *p = new Subject;
int y;
do
{
y = 0;
cout << "请输入课程号：";
cin >> p ->subID;
q = head_sub ->next;
while (q)
{
if (q ->subID == p ->subID)
{
y = 1;
cout << "该课程号已存在，请重新输入！" << endl;
break;
}
q = q ->next;
}
}while (y == 1);
cout << "请输入课程名：";
cin >> p ->subName;
cout << "请输入课程学分：";
cin >> p ->mark;
cout << "请输入最大学生容量：";
cin >> p ->maxNum;
cout << "请输入课程类型归属：";
cin >> p ->subCate;
cout << "请输入任课教师工号：";
cin >> p ->subTearcherID;
cout << "请输入任课教师姓名：";
cin >> p ->subTeacher;
p ->okNum = 0;
cout << "确定要添加此课程？\n";
cout << " 1-确定 0-取消\n";
cout << "请选择：";
int c;
cin >> c;
if (c == 1)
{
writeAddSub(p);
cout << "添加课程成功！";
}
string s = p ->subID + ".txt";
ofstream ou(s);
ou.close();
cout << " *按Enter键返回！*" << endl;
}//Manager::addSub()
/** 修改课程信息 **/
void Manager::modifySub()
{
ifstream in("Subject.txt");
if (!in)
{
cout << "Can't open the file!\n";
exit(0);
}
Subject *head_sub = new Subject;
head_sub ->next = NULL;
string s;
head_sub = readSub();
Subject *p = head_sub ->next;
int y = 1;
int choice;
while (y)
{
system("cls");
cout << " ------------------\n";
cout << " *选 课 系 统*\n";
cout << " *修改课程*\n";
cout << " ------------------\n\n";
cout << " *******************************************\n\n";
cout << " *******************************************\n\n";
cout << " || 1-修改课程名 2-修改课程学分 ||\n\n";
cout << " || 3-修改课程容量 4-修改任课教师 ||\n\n";
cout << " || 5-修改课程归属 6-全部修改 ||\n\n";
cout << " || 0-退出修改 ||\n\n";
cout << " *******************************************\n\n";
cout << " *******************************************\n\n";
cout << " 请输入所选择的序号:";
cin >> choice;
if(choice >= 0 && choice <= 6)
y = 0;
else
{
cout << " 输入错误，请重新输入！\n";
getchar();
getchar();
system("cls");
}//switch(choice)
}//while(y)
if (choice != 0)
{
cout << "请输入要修改课程的课程号：";
cin >> s;
}
p = head_sub ->next;
int flag = 1;
while (p)
{
if (p ->subID == s)
{
flag = 0;
break;
}
p = p ->next;
}
if (flag == 0)
{
int flag = 1;
switch(choice)
{
case 0: break;
case 1:
cout << "请输入修改后的课程名：";
cin >> p ->subName;
break;
case 2:
cout << "请输入修改后的课程学分：";
cin >> p ->mark;
break;
case 3:
cout << "请输入修改后的课程容量：";
cin >> p ->maxNum;
break;
case 4:
cout << "请输入修改后的任课教师工号：";
cin >> p ->subTearcherID;
cout << "请输入修改后的任课教师：";
cin >> p ->subTeacher;
break;
case 5:
cout << "请输入修改后的课程归属：";
cin >> p ->subCate;
break;
case 6:
cout << "请输入修改后的课程名：";
cin >> p ->subName;
cout << "请输入修改后的课程学分：";
cin >> p ->mark;
cout << "请输入修改后的课程容量：";
cin >> p ->maxNum;
cout << "请输入修改后的任课教师工号：";
cin >> p ->subTearcherID;
cout << "请输入修改后的任课教师：";
cin >> p ->subTeacher;
break;
default :
flag = 0;
break;
}//switch
if (flag == 1)
{
cout << "\n确定要修改课程信息？";
cout << "\n 1-确定 0-取消\n";
cout << "请选择：";
int c;
cin >> c;
if (c == 1)
{
writeSub(head_sub);
cout << "修改课程成功！";
}
}
else
cout << "输入错误，修改失败！";
}//if
else if (choice == 0)
{
;
}
else
{
cout << "未找到此课程号对应的信息！";
getchar();
}
cout << " *按Enter键返回！*" << endl;
}//Manager::modifySub
/** 删除课程信息 **/
void Manager::deleteSub()
{
Subject *head_sub = new Subject;
head_sub ->next = NULL;
Subject *p, *q;
head_sub = readSub();
string s;
cout << "请输入要删除课程的课程号：";
cin >> s;
p = head_sub ->next;
q = head_sub;
int flag = 1;
while (p)
{
if (p ->subID == s)
{
flag = 0;
break;
}
q = p;
p = p ->next;
}
if (flag == 0)
{
cout << "要删除的课程信息为：\n";
cout << "课程号：" << p ->subID << endl;
cout << "课程名：" << p ->subName << endl;
cout << "任课教师：" << p ->subTeacher << endl << endl;
cout << "\n确定要修改课程信息？";
cout << "\n 1-确定 0-取消\n";
cout << "请选择：";
int c;
cin >> c;
if (c == 1)
{
q ->next = p ->next;
free(p);
writeSub(head_sub);
char sn[20];
int len = s.size();
for (int i = 0; i <= len; i++)
{
sn[i] = s[i];
}
strcat(sn, ".txt");
remove(sn);
cout << "\n删除成功！\n";
}//if
}//if
else
{
cout << "未找到该课程！";
getchar();
}
cout << " *按Enter键返回！*" << endl;
}//Manager::deleteSub
/**设置选课时间**/
void Manager::setSelSubTime()
{
cout << "选课开始时间\n";
cout << "年："; cin >> start.year;
cout << "月："; cin >> start.month;
cout << "日："; cin >> start.day;
cout << "选课结束时间\n";
cout << "年："; cin >> endt.year;
cout << "月："; cin >> endt.month;
cout << "日："; cin >> endt.day;
ofstream ou("TimeSelect.txt");
if (!ou)
{
cout << "Can't open \"TimeSelect.txt\"!";
exit(0);
}
ou << start.year << " " << start.month << " " << start.day << endl;
ou << endt.year << " " << endt.month << " " << endt.day << endl;
ou.close();
cout << "设置成功！ *按Enter键返回！*" << endl;
}//Manager::setSelSubTime
/**设置选课时间**/
void Manager::setQuitSubTime()
{
cout << "退课开始时间\n";
cout << "年："; cin >> start.year;
cout << "月："; cin >> start.month;
cout << "日："; cin >> start.day;
cout << "退课结束时间\n";
cout << "年："; cin >> endt.year;
cout << "月："; cin >> endt.month;
cout << "日："; cin >> endt.day;
ofstream ou("TimeQuit.txt");
if (!ou)
{
cout << "Can't open \"TimeQuit.txt\"!";
exit(0);
}
ou << start.year << " " << start.month << " " << start.day << endl;
ou << endt.year << " " << endt.month << " " << endt.day << endl;
ou.close();
cout << "设置成功！ *按Enter键返回！*" << endl;
}//Manager::setQuitSubTime
//修改密码
void Manager::modifyPwM()
{
IdPw *head_ip = new IdPw;
string pw1, pw2, pw3;
int flag = 1;
head_ip = read("ManagerIP.txt");
if (head_ip == NULL)
{
cout << "\n\n\t\t\t\t文件打开错误，密码修改失败！";
return ;
}
IdPw *p = head_ip ->next;
cout << "\n\t\t\t\t请输入原密码：";
cin >> pw1;
cout << "\n\n\t\t\t\t请输入新密码：";
cin >> pw2;
cout << "\n\n\t\t\t\t再次输入新密码：";
cin >> pw3;
p = head_ip ->next;
while (p)
{
if (p ->id == ma.ip.id)
{
if (p ->password == pw1)
{
if (pw2 == pw3)
{
p ->password = pw2;
cout << "\n\n\t\t\t\t密码修改成功！";
cout << " *按Enter键返回！*" << endl;
write(head_ip, "ManagerIP.txt");
}
else
{
cout << "\n\n\t\t\t\t两次新密码不一致！";
}
flag = 0;
}
}
if (flag == 0)
break;
p = p ->next;
}
if (flag == 1)
cout << "\n\n\t\t\t\t原密码输入错误！";
}//Manager::modifyPwM
void Manager::ShowSub()
{
Subject *head_sub = new Subject;
head_sub ->next = NULL;
head_sub = readSub();
Subject *p = head_sub ->next;
cout << setiosflags(ios_base::left) << setw(4) << "序号" << setw(13) << " 课程编号" << setw(16) << " 课程名" << setw(6) << "学分" << setw(7) << "剩余" << setw(10) << "最大容量" << setw(10) <<"任课老师" << "课程属性\n";
cout << "===========================================";
cout << "====================================" << endl;
int i = 1;
while (p)
{
cout << setiosflags(ios_base::left) << " " << setw(4) << i++ << setw(14) << p ->subID << setw(14) << p ->subName << setw(6) << p ->mark << setw(8) << p ->maxNum - p ->okNum << setw(10) << p ->maxNum << setw(10) << p ->subTeacher << setw(10) <<p ->subCate << endl << endl;
p = p ->next;
}
}//Manager::ShowSub()
/** load() **/
int key;
//登录界面
void loadMenu(int t)
{
char pw[20];
system("cls");
cout << "\n\n\n\n\n\n\n";
cout << " ╔*☆***◎***◇***☆*** 欢迎光临 ***☆***◇***◎***☆*╗\n";
cout << " ************************* 教 务 系 统 ************************\n\n";
cout << endl << endl;
cout << "\t\t\t\t请输入用户名：";
switch(t)
{
case 1: cin >> st.ip.id; break;
case 2: cin >> tea.ip.id; break;
case 3: cin >> ma.ip.id; break;
}
cout << "\n\t\t\t\t请输入密码： ";
int i = 0;
char c;
do
{
c = getch();
if (c == '\b')
{
cout << "\b";
cout << '\0';
i--;
cout << "\b";
}
else if (c != '\r')
{
cout << "*";
pw[i] = c;
i++;
}
}while (c != '\r');
pw[i] = '\0';
string pw1 = (string) pw;
switch(t)
{
case 1: st.ip.password = pw1; break;
case 2: tea.ip.password = pw1; break;
case 3: ma.ip.password = pw1; break;
}
}//loadMenu()
//学生登录
int load_student()
{
int flag = 0;
loadMenu(1);
ifstream in("studentIP.txt");
if (!in)
{
cout << "Can't open \"studentIP.txt\"!" << endl;
exit(0);
}
string ids, pws;
while (in >> ids >> pws)
{
if (ids == st.ip.id)
{
flag = 1;
break;
}
}
in.close();
if (flag == 0)
{
key = 0;
cout << "\n\n\t\t\t\t账号不存在！";
getchar();
getchar();
return 0;
}
if (pws == st.ip.password)
{
return 1;
}
return 0;
}//load_student()
//教师登录
int load_teacher()
{
int flag = 0;
loadMenu(2);
ifstream in("TeacherIP.txt");
if (!in)
{
cout << "Can't open \"TeacherIP.txt\"!" << endl;
exit(0);
}
string ids, pws;
while (in >> ids >> pws)
{
if (ids == tea.ip.id)
{
flag = 1;
break;
}
}
in.close();
if (flag == 0)
{
key = 0;
cout << "\n\n\t\t\t\t账号不存在！";
getchar();
getchar();
return 0;
}
if (pws == tea.ip.password)
{
return 1;
}
return 0;
}//load_teacher()
//管理员登录
int load_manager()
{
int flag = 0;
loadMenu(3);
ifstream in("ManagerIP.txt");
if (!in)
{
cout << "Can't open \"ManagerIP.txt\"!" << endl;
exit(0);
}
string ids, pws;
while (in >> ids >> pws)
{
if (ids == ma.ip.id)
{
flag = 1;
break;
}
}
in.close();
if (flag == 0)
{
key = 0;
cout << "\n\n\t\t\t\t账号不存在！";
getchar();
getchar();
return 0;
}
if (pws == ma.ip.password)
{
return 1;
}
return 0;
}//load_manager()
void Menu_Student()
{
int y = 1;
int choice;
while (y)
{
system("cls");
cout << " ------------------\n";
cout << " *选 课 系 统*\n";
cout << " ------------------\n\n";
cout << " *******************************************\n\n";
cout << " *******************************************\n\n";
cout << " || 1-选课 2-查看可选课程 ||\n\n";
cout << " || 3-退课 4-查看已选课程 ||\n\n";
cout << " || 5-修改密码 0-退出系统 ||\n\n";
cout << " *******************************************\n\n";
cout << " *******************************************\n\n";
cout << " 请输入所选择的序号:";
cin >> choice;
system("cls");
switch (choice)
{
case 0: y = 0; break;
case 1: st.selecSub(); getchar(); break;
case 2: st.readShowSub(); cout << "按Enter键返回！"; getchar(); break;
case 3: st.quitSub(); getchar(); break;
case 4: st.querySub(); cout << "按Enter键返回！"; getchar(); break;
case 5: st.modifyPw(); getchar(); break;
default:
cout << " 输入错误，请重新输入！\n";
getchar();
break;
}//switch(choice)
getchar();
}//while(y)
}//Menu_Student()
void Menu_Teacher()
{
int y = 1;
int choice;
while (y)
{
system("cls");
cout << " ------------------\n";
cout << " *选 课 系 统*\n";
cout << " ------------------\n\n";
cout << " *******************************************\n\n";
cout << " *******************************************\n\n";
cout << " || 1-查看所教课程信息 2-修改密码 ||\n\n";
cout << " || 0-退出系统 ||\n\n";
cout << " *******************************************\n\n";
cout << " *******************************************\n\n";
cout << " 请输入所选择的序号:";
cin >> choice;
system("cls");
switch (choice)
{
case 0: y = 0; break;
case 1: tea.querySubInfo(); getchar(); break;
case 2: tea.modifyPw(); getchar(); break;
default:
cout << " 输入错误，请重新输入！\n";
getchar();
break;
}//switch(choice)
getchar();
}//while(y)
}//Menu_Teacher()
void Menu_Manager()
{
int y = 1;
int choice;
while (y)
{
system("cls");
cout << " ------------------\n";
cout << " *选 课 系 统*\n";
cout << " ------------------\n\n";
cout << " *******************************************\n\n";
cout << " *******************************************\n\n";
cout << " || 1-添加课程 2-修改课程信息 ||\n\n";
cout << " || 3-删除课程 4-修改密码 ||\n\n";
cout << " || 5-设置选课时间 6-设置退课时间 ||\n\n";
cout << " || 7-查看可选课程 0-退出系统 ||\n\n";
cout << " *******************************************\n\n";
cout << " *******************************************\n\n";
cout << " 请输入所选择的序号:";
cin >> choice;
system("cls");
switch (choice)
{
case 0: y = 0; break;
case 1: ma.addSub(); getchar(); break;
case 2: ma.modifySub(); getchar(); break;
case 3: ma.deleteSub(); getchar(); break;
case 4: ma.modifyPwM(); getchar(); break;
case 5: ma.setSelSubTime(); getchar(); break;
case 6: ma.setQuitSubTime(); getchar(); break;
case 7: ma.ShowSub(); cout << "*按Enter键返回！"; getchar(); break;
default:
cout << " 输入错误，请重新输入！\n";
getchar();
break;
}//switch(choice)
getchar();
}//while(y)
}//Menu_Manager()
//登录
void load()
{
int n;
int y = 1;
while (y)
{
key = 1;
system("cls");
cout << "\n\n\n\n\n\n\n";
cout << " ╔*☆***◎***◇***☆*** 欢迎光临 ***☆***◇***◎***☆*╗\n";
cout << " ************************* 教 务 系 统 ************************\n\n";
cout << endl << endl;
cout << " ============1-学生登录===========\n";
cout << " ============2-教师登录===========\n";
cout << " ============3-管理员登录=========\n";
cout << " ============0-退出系统===========\n";
cout << " 请输入您的选择:";
cin >> n;
cout << endl;
switch(n)
{
case 0: y = 0; break;
case 1: if (load_student() == 0 && key == 1)
{
cout << "\n\n\n\t\t\t\t密码输入错误！";
getchar();
getchar();
}
else if (key == 1)
{
cout << "\n\n\n\t\t\t\t登录成功，按Enter进入！";
getchar();
getchar();
Menu_Student();
}
break;
case 2: if(load_teacher() == 0 && key == 1)
{
cout << "\n\n\n\t\t\t\t密码输入错误！";
getchar();
getchar();
}
else if (key == 1)
{
cout << "\n\n\n\t\t\t\t登录成功，按Enter进入！";
getchar();
getchar();
Menu_Teacher();
}
break;
case 3: if(load_manager() == 0 && key == 1)
{
cout << "\n\n\n\t\t\t\t密码输入错误！";
getchar();
getchar();
}
else if (key == 1)
{
cout << "\n\n\n\t\t\t\t登录成功，按Enter进入！";
getchar();
getchar();
Menu_Manager();
}
break;
default : y = 1; cout << "\n\n\t\t\t\t输入错误！";
}//switch
}//while(y)
}//load()
int main()
{
load();
return 0;
}
