教师id    姓名    密码	1    大明	123123

#include <iostream>#include <string>#include <fstream>using namespace std;const int T_SUM = 128;					//教师容纳量const int S_SUM = 1024;					//学生容纳量const int C_SUM = 128;					//课程容纳量class Teacher {public:	static int inputTeacher();			//从文件读入教师数据到对象数组	static void outputTeacher();		//从对象数组输出教师数据到文件	static void printHead();			//输出字段名	static int teacherSum;				//储存实际教师人数	void init(string tid, string tname, string tpassword);	//初始化教师信息	bool login();						//登录功能	void find();						//查询某个老师信息	void addStudent();					//用于实例化一个学生类并调用学生类的init函数（增加学生信息）	void delStudent();					//删除学生信息	void setStudent();					//修改学生信息	int findStudent();					//查询学生信息	void setpassword();					//教师修改自己的密码	void showMyInfo();					//供登录教师查看自己的信息	void addCourse();					//增加课程信息	void delCourse();					//删除课程信息	void setCourse();					//修改课程信息protected:	string tid;							//教师id	string tname;						//教师姓名	string tpassword;					//教师登录密码};class Student {public:	friend class Teacher;				//友元类，使得学生类的保护成员能被教师类访问	static int inputStudent();			//从文件读入学生数据到对象数组	static void outputStudent();		//从对象数组输出学生数据到文件	static void sortByASC();			//总成绩按升序排列	static void sortByDESC();			//总成绩按降序排列	static void sortBySid();			//总成绩按学号排列	static void printHead();			//输出字段名	static void display();				//显示所有学生信息	static void selectFail();			//显示不及格的学生	static int studentSum;				//储存实际学生	void init(string sid, string sname, string spassword, double midScore , double finalScore);	//初始化(增加)学生信息	bool login();						//登录功能	void add();							//增加学生信息	void del();							//删除学生信息	void find();						//查询某个学生信息	void setSid();						//修改学生id	void setSname();					//修改学生姓名	void setSpassword();				//修改学生密码	void setMidScore();					//修改期中成绩	void setFinalScore();				//修改期末成绩	void showMyInfo();					//供登录学生查看自己的信息	void chooseCourse();				//选修课程	void delCourse();					//退选课程protected:	string sid;							//学生id	string sname;						//学生姓名	string spassword;					//学生登录密码	double midScore;					//学生期中成绩	double finalScore;					//学生期末成绩	double sumScore;					//学生总分	double aveScore;					//学生平均成绩	string _course;						//选修课程名};class Course {public:	friend class Teacher;				//友元类，使得课程类的保护成员能被教师类访问	friend class Student;				//友元类，使得课程类的保护成员能被学生类访问	static int inputCourse();			//从文件读入课程数据到对象数组	static void outputCourse();			//从对象数组输出课程数据到文件	static void display();				//显示所有课程	static void printHead();			//输出字段名	static int courseSum;				//储存实际课程	void init(string cid, string cname, int csum);	//初始化课程信息	void add();							//添加课程	void del();							//删除课程	void setCid();						//修改课程号	void setCname();					//修改课程名	void setCsum();						//修改课程数	void find();						//查询课程信息protected:	string cid;							//课程编号	string cname;						//课程名	int csum;							//课程剩余数};Teacher teacher[T_SUM];int Teacher::teacherSum = inputTeacher();Student student[S_SUM];int Student::studentSum = inputStudent();Course course[C_SUM];int Course::courseSum = inputCourse();//class of Teacherint Teacher::inputTeacher() {	int count = 0;	string tid;		string tname;	string tpassword;		ifstream fin;	fin.open("D:\\teacher.txt");	//没有文件就创建文件	if(!fin) {		outputTeacher();		return 0;	//返回0个教师数	}	//过滤字段名	string temp;	fin >> temp;	fin >> temp;	fin >> temp;	for(int i = 0; i < T_SUM; i++){		fin >> tid; 		fin >> tname;		fin >> tpassword;		if (fin.get() == EOF)			break;		teacher[i].init(tid, tname, tpassword);		count++;	}	return count;}void Teacher::outputTeacher() {	ofstream fout;	fout.open("D:\\teacher.txt", ios::trunc|ios::in);	if(!fout) {cout<<"写入数据失败！";return;}	fout << "教师id" << "\t"		<<	"姓名"	<< "\t"		<<	"密码"	<< "\t";	fout << endl; 	for(int i = 0; i < teacherSum; i++){		fout << teacher[i].tid << "\t"			<< teacher[i].tname << "\t"			<< teacher[i].tpassword << endl;	}	fout.close();}void Teacher::printHead() {	cout << endl;	cout << "教师id" << "\t"		<<	"姓名"	<< "\t"		<<	"密码"	<< "\t";	cout << endl;}bool Teacher::login() {	cout << endl;	string tid;	string tpassword;	cout << "---登录界面---" << endl;	cout << "请输入教师id：" ;	cin >> tid;	cout << "请输入密码: " ;	cin >> tpassword;	Teacher temp;	for(int i = 0; i < teacherSum; i++) {		temp = teacher[i];		if(tid == temp.tid) {			if(tpassword == temp.tpassword) {				cout << endl;				cout << "---登录成功：欢迎你" << temp.tname << "!---" <<endl;				//登录成功后要用对象数组中存放的信息初始化当前对象				init(teacher[i].tid, teacher[i].tname, teacher[i].tpassword);				return true;			} else {				cout << endl;				cout << "---登录失败：密码不正确！---" ;				cout << endl;				return false;			}		}	}	cout << endl;	cout << "---登录失败：找不到该教师id！---" ;	cout << endl;	return false;}void Teacher::init(string tid, string tname, string tpassword) {	this -> tid = tid;	this -> tname = tname;	this -> tpassword = tpassword;}void Teacher::addStudent() {	Student temp;	string sid;		string sname;	string spassword = "123456";	//默认密码	double midScore;		double finalScore;		cout << endl;back:	cout << "请输入学生学号：";	cin >> sid;	//学号不能重复的输入合法性检查	for(int i = 0; i < Student::studentSum; i++) {		if(sid == student[i].sid ) {			cout<<endl				<<"学号不能重复，请重新输入。"				<<endl;			goto back;		}	}	cout << "请输入学生姓名：";	cin >> sname;	cout << "请输入学生期中成绩：";	cin >> midScore;	cout << "请输入学生期末成绩：";	cin >> finalScore;	temp.init(sid, sname, spassword, midScore, finalScore);	temp.add();	cout << endl;	cout << "---添加学生信息成功！---";	cout << endl;}int Teacher::findStudent() {	Student temp;	string sid;	cout << endl;	cout << "请输入要查找学生的学号：";	cin >> sid;	int i;	for(i = 0; i < Student::studentSum; i++) {		if(sid == student[i].sid) {			temp.init(student[i].sid, student[i].sname, student[i].spassword, student[i].midScore, student[i].finalScore);			cout << "---找到如下学生信息---";			Student::printHead();			temp.find();			//返回找到的学生在对象数组中的位置			return i;		}	}	cout << endl;	cout << "---找不到该学生！---";	cout << endl;	return -1;}void Teacher::delStudent() {	Student temp;	cout<<endl;	cout<< "---请先查找要被删除的学生---";	cout<<endl;	string sid;	cout << endl;	cout << "请输入要查找学生的学号：";	cin >> sid;	for(int i = 0; i < Student::studentSum; i++) {		if(sid == student[i].sid) {			temp.init(student[i].sid, student[i].sname, student[i].spassword, student[i].midScore, student[i].finalScore);			temp.del();			return;		}	}	cout << endl;	cout << "---找不到该学生！---";	cout << endl;}void Teacher::setStudent() {	Student temp;	int point = findStudent();	cout << endl;	temp = student[point];	int flg;	cout<<"┌───────────┐"<<endl		<<"│   学生成绩管理系统   │"<<endl		<<"│   修改学生信息菜单   │"<<endl		<<"├───────────┤"<<endl		<<"│   1.修改学生学号     │"<<endl		<<"│   2.修改学生姓名     │"<<endl		<<"│   3.修改学生密码     │"<<endl		<<"│   4.修改期中成绩     │"<<endl		<<"│   5.修改期末成绩     │"<<endl		<<"│   6.返回上级菜单     │"<<endl		<<"└───────────┘"<<endl;	cout<<"请输入操作编号：";	cin>>flg;	switch (flg)	{	case(1):		temp.setSid();break;	case(2):		temp.setSname();break;	case(3):		temp.setSpassword();break;	case(4):		temp.setMidScore();break;	case(5):		temp.setFinalScore();break;	case(6):		return;	default:		cout<<endl<<"───输入有误！───"<<endl<<endl;		break;	}}void Teacher::setpassword() {	string tpassword;	cout << endl;	cout << "请输入新密码：";	cin >> tpassword;	this -> tpassword = tpassword;	for(int i = 0; i < teacherSum; i++) {		if(this -> tid == teacher[i].tid) {			teacher[i].tpassword = tpassword;			break;		}	}	outputTeacher();	inputTeacher();	cout << "---密码修改成功！---" <<endl;}void Teacher::showMyInfo() {	printHead();	find();}void Teacher::find() {	cout << tid << "\t"		<< tname << "\t"		<< tpassword << "\t";	cout << endl;}void Teacher::addCourse() {	Course temp;	string cid;	string cname;	int csum;	cout << endl;back9:	cout << "请输入课程号：";	cin >> cid;	//学号不能重复的输入合法性检查	for(int i = 0; i < Course::courseSum; i++) {		if(cid == course[i].cid ) {			cout<< endl				<< "---课程号不能重复，请重新输入！---"				<< endl;			goto back9;		}	}	cout << "请输入课程名称：";	cin >> cname;	cout << "请输入课程数目：";	cin >> csum; 	temp.init(cid, cname, csum);	temp.add();	cout << endl;	cout << "---添加课程信息成功！---";	cout << endl;}void Teacher::delCourse() {	Course temp;	cout<<endl;	cout<< "---请先查找要被删除的课程---";	cout<<endl;	string cid;	cout << endl;	cout << "请输入要查找的课程号：";	cin >> cid;	for(int i = 0; i < Course::courseSum; i++) {		if(cid == course[i].cid) {			temp.init(course[i].cid, course[i].cname, course[i].csum);			temp.del();			return;		}	}	cout << endl;	cout << "---找不到该课程！---";	cout << endl;}void Teacher::setCourse() {	Course temp;	cout<<endl;	cout<< "---请先查找要被修改的课程---";	cout<<endl;	string cid;	cout << endl;	cout << "请输入要查找的课程号：";	cin >> cid;	int point = -1;	for(int i = 0; i < Course::courseSum; i++) {		if(cid == course[i].cid) {			temp = course[i];			point = i;		}	}	cout << "---找到以下课程---" << endl;	temp.find();	if(point == -1) {		cout << endl;		cout << "---找不到该课程！---";		cout << endl;		return;	}	int flg;	cout<<"┌───────────┐"<<endl		<<"│   学生成绩管理系统   │"<<endl		<<"│     课程管理菜单     │"<<endl		<<"├───────────┤"<<endl		<<"│     1.修改课程号     │"<<endl		<<"│     2.修改课程名     │"<<endl		<<"│     3.修改课程数     │"<<endl		<<"├───────────┤"<<endl		<<"│    4.返回上级菜单    │"<<endl		<<"└───────────┘"<<endl;	cout<<"请输入操作编号：";	cin>>flg;	switch (flg)	{		case(1):			temp.setCid();			break;		case(2):			temp.setCname();			break;		case(3):			temp.setCsum();			break;		case(4):			return;		default:			cout<<endl<<"───输入有误！───"<<endl<<endl;			break;	}}//class of Studentint Student::inputStudent() {	int count = 0;	string sid;		string sname;		string spassword;		double midScore;		double finalScore;	string _course;	ifstream fin;	fin.open("D:\\student.txt");	//没有文件就创建文件	if(!fin) {		outputStudent();		return 0;	//返回0个学生数	}	//过滤字段名	string temp;	fin >> temp; 	fin >> temp;	fin >> temp;	fin >> temp;	fin >> temp;	fin >> temp;		fin >> temp;	fin >> temp;	for(int i = 0; i < S_SUM; i++){		fin >> sid; 		fin >> sname;		fin >> spassword;		fin >> midScore;		fin >> finalScore;		fin >> temp;	//总分和平均成绩让init函数去计算，这里读入temp为过滤掉		fin >> temp;		fin >> _course;		if (fin.get() == EOF)			break;		student[i].init(sid, sname, spassword, midScore, finalScore);		student[i]._course = _course;		count++;	}	return count;}void Student::outputStudent() {	ofstream fout;	fout.open("D:\\student.txt", ios::trunc|ios::in);	if(!fout) {cout<<"写入数据失败！";return;}	fout << "学号" << "\t"		<<	"姓名"	<< "\t"		<<	"密码"	<< "\t"		<<	"期中"	<< "\t"		<<	"期末"	<< "\t"		<<	"总分"	<< "\t"		<<	"平均分"	<< "\t"		<<	"选修课"	<< "\t";	fout << endl;	for(int i = 0; i < studentSum; i++){		//只将未被标记删除的学生导入文件		if( student[i].sid != "deleted") {			fout << student[i].sid<< "\t\t"				<< student[i].sname << "\t"				<< student[i].spassword << "\t\t"				<< student[i].midScore << "\t\t"				<< student[i].finalScore << "\t\t"				<< student[i].sumScore << "\t\t"				<< student[i].aveScore << "\t\t"				<< student[i]._course << endl;		}	}	fout.close();}void Student::printHead() {	cout << endl;	cout << "学号" << "\t"		<<	"姓名"	<< "\t"		<<	"密码"	<< "\t"		<<	"期中"	<< "\t"		<<	"期末"	<< "\t"		<<	"总分"	<< "\t"		<<	"平均分"	<< "\t"		<<	"选修课"	<< "\t";	cout << endl;}void Student::init(string sid, string sname, string spassword, double midScore , double finalScore) {	this -> sid = sid;	this -> sname = sname;	this -> spassword = spassword;	this -> midScore = midScore;	this -> finalScore = finalScore;	//计算总分和平均分	this -> sumScore = midScore + finalScore;	this -> aveScore = sumScore / 2;	//选课功能为后加，这样写有点不正确	for(int i = 0; i < studentSum; i++) {		if(this -> sid == student[i].sid) {			_course = student[i]._course;			return;		}	}	_course = "无";}void Student::add() {	student[studentSum].sid = sid;	student[studentSum].sname = sname;	student[studentSum].spassword = spassword;	student[studentSum].midScore = midScore;	student[studentSum].finalScore = finalScore;	student[studentSum].sumScore = sumScore;	student[studentSum].aveScore = aveScore;	student[studentSum]._course = _course;	Student::studentSum++;	outputStudent();}void Student::del() {	bool flg = false;	string flg0;	//先找到要被删除的学生在对象数组中的位置	for(int i = 0; i < studentSum; i++) {		if(sid == student[i].sid ) {			//二次确认			cout << endl;			cout << "---你确定要删除学生：" << sid << "，" << student[i].sname << "。---";			cout << endl;			cout << "---输入Y确定---";			cout << endl;			cin >> flg0;			if(flg0 == "Y" || flg0 == "y") {				//将被删除学生的sid标记为deleted				student[i].sid = "deleted";				//学生总数-1				Student::studentSum--;					//使删除后的学生覆盖到对象数组中				outputStudent();				inputStudent();					flg = true;				cout << endl;				cout << "---删除学生信息成功！---";				cout << endl;				break;			} else {				break;			}		}	}	if(flg == false) {		cout << endl;		cout << "---删除学生信息失败！---";		cout << endl;	}}void Student::find() {	cout << sid << "\t"		<< sname << "\t"		<< spassword << "\t"		<< midScore << "\t"		<< finalScore << "\t"		<< sumScore << "\t"		<< aveScore << "\t"		<< _course;	cout << endl;}void Student::sortByASC() {	Student temp;	//将对象数组student中的数据按总分升序排序	for(int i = 0; i < studentSum - 1; i++){		for(int j = i + 1; j < studentSum; j++){			if( student[i].sumScore > student[j].sumScore){				temp = student[i]; 				student[i] = student[j]; 				student[j] = temp;			}		}	}	//输出到文件保存	outputStudent();}void Student::sortByDESC() {	Student temp;	//将对象数组student中的数据按总分降序排序	for(int i = 0; i < studentSum - 1; i++){		for(int j = i + 1; j < studentSum; j++){			if( student[i].sumScore < student[j].sumScore){				temp = student[i]; 				student[i] = student[j]; 				student[j] = temp;			}		}	}	//输出到文件保存	outputStudent();}void Student::sortBySid() {	Student temp;	//将对象数组student中的数据按总分降序排序	for(int i = 0; i < studentSum - 1; i++){		for(int j = i + 1; j < studentSum; j++){			if( student[i].sid > student[j].sid){				temp = student[i]; 				student[i] = student[j]; 				student[j] = temp;			}		}	}	//输出到文件保存	outputStudent();}void Student::display() {	printHead();	//遍历数组，赋值给temp，调用temp对象find()函数进行输出	Student temp;	for(int i = 0; i < studentSum; i++){		temp = student[i];		temp.find();	}}void Student::selectFail() {	printHead();	//遍历数组，赋值给temp，调用temp对象find()函数进行输出	Student temp;	for(int i = 0; i < studentSum; i++){		//期中，期末有一科不及格就筛选出来并输出		if(student[i].midScore < 60 || student[i].finalScore < 60) {			temp = student[i];			temp.find();		}	}}void Student::setSid() {	cout << endl;	string sid;	for(int i = 0; i < Student::studentSum; i++) {		//注意this		if(this -> sid == student[i].sid ) {back0:			cout << "请输入新的学号：";			cin >> sid;			//学号不能重复的输入合法性检查			for(int i = 0; i < Student::studentSum; i++) {				if(sid == student[i].sid ) {					cout<< endl						<< "---学号不能重复，请重新输入！---"						<< endl;					goto back0;				}			}			student[i].sid = sid;			break;		}	}	outputStudent();	inputStudent();	cout << "---学号修改成功！---" <<endl;}void Student::setSname() {	cout << endl;	string sname;	for(int i = 0; i < Student::studentSum; i++) {		if(this -> sid == student[i].sid) {			cout << "请输入新的姓名：";			cin >> sname;			student[i].sname = sname;			break;		}	}	outputStudent();	inputStudent();	cout << "---姓名修改成功！---" <<endl;}void Student::setSpassword() {	cout << endl;	string spassword;	for(int i = 0; i < Student::studentSum; i++) {		if(this -> sid == student[i].sid) {back1:			cout << "请输入新的密码：";			cin >> spassword;			//新密码不能为初始密码123456 且不能少于6位			if(spassword == "123456" && spassword.length() < 6) {				cout<<endl					<<"密码过于简单，请重新输入！"					<<endl					<<endl;				goto back1;				//学生有权限更改自己的密码，要将当前对象的spassword也更改了				this -> spassword = spassword;				student[i].spassword = spassword;				break;			}		}	}	outputStudent();	inputStudent();	cout << "---密码修改成功！---" <<endl;}void Student::setMidScore() {	cout << endl;	double midScore;	for(int i = 0; i < Student::studentSum; i++) {		if(this -> sid == student[i].sid) {			cout << "请输入新的期中成绩：";			cin >> midScore;			student[i].midScore = midScore;			break;		}	}	outputStudent();	inputStudent();	cout << "---期中成绩修改成功！---" <<endl;}void Student::setFinalScore() {	cout << endl;	double finalScore;	for(int i = 0; i < Student::studentSum; i++) {		if(this -> sid == student[i].sid) {			cout << "请输入新的期末成绩：";			cin >> finalScore;			student[i].finalScore = finalScore;			break;		}	}	outputStudent();	inputStudent();	cout << "---期末成绩修改成功！---" <<endl;}bool Student::login() {	cout << endl;	string sid;	string spassword;	cout << "---登录界面---" << endl;	cout << "请输入学号：" ;	cin >> sid;	cout << "请输入密码（初始密码123456）: " ;	cin >> spassword;	Student temp;	for(int i = 0; i < studentSum; i++) {		temp = student[i];		if(sid == temp.sid) {			if(spassword == temp.spassword) {								//判断是否第一次登录，第一次登录需要改密码				if(temp.spassword != "123456") {					cout << endl;					cout << "---登录成功：欢迎你" << temp.sname << "!---" <<endl;					//登录成功后要用对象数组中存放的信息初始化当前对象					init(student[i].sid, student[i].sname, student[i].spassword, student[i].midScore , student[i].finalScore);					return true;				} else {					cout << endl;					cout << "---登录成功：你是第一次登录，需要修改密码！ ---" << endl;					//登录成功后要用对象数组中存放的信息初始化当前对象					init(student[i].sid, student[i].sname, student[i].spassword, student[i].midScore , student[i].finalScore);					student[i].setSpassword();					return true;				}			} else {				cout << endl;				cout << "---登录失败：密码不正确！---" ;				return false;			}		}	}	cout << endl;	cout << "---登录失败：找不到该学号，请联系管理员！---" ;	cout << endl;	return false;}void Student::showMyInfo() {	printHead();	find();}void Student::chooseCourse() {	cout << endl;	Course::display();	cout << endl;	Course temp;	string cid;	cout << "请选择要选修的课程号：" << endl;	cin >> cid;	for(int i = 0; i < Course::courseSum; i++) {		if(cid == course[i].cid) {			if(course[i].csum > 0 && _course == "无") {				_course = course[i].cname;				course[i].csum--;	//选修后，课程剩余量-1				//保存数据				for(int j = 0; j < Student::studentSum; j++)  {					if(this -> sid == student[j].sid) {						student[j]._course = course[i].cname;						outputStudent();						//记得保存course对象数组中的数据到文件！！						Course::outputCourse();							break;					}				}				cout << "---选修"<< course[i].cname << "成功！---";				cout << endl;				return;			} else if(_course != "无") {				cout << "---你已选修了" << _course << "课程，请退选后重试！---";				cout << endl;				return;			} else {				cout << "---该课程已满！---";				cout << endl;				return;			}		}	}	cout << "---找不到该课程！---";	cout << endl;}void Student::delCourse() {	cout << endl;	string flg;	cout << "---你确定要退选 " << _course << " 课程？输入Y确定。---" << endl;	cin >> flg;	if(flg == "Y" || flg == "y") {		for(int i = 0; i < Course::courseSum; i++) {			if(_course == course[i].cname) {				course[i].csum++;	//退选后，课程剩余数+1				_course = "无";				//保存数据				for(int j = 0; j < Student::studentSum; j++) {					if(this -> sid == student[j].sid) {						student[j]._course = _course;						outputStudent();												break;					}				} 				//记得保存course对象数组中的数据到文件！！				Course::outputCourse();					cout << "---退选"<< course[i].cname << "成功！---";				cout << endl;				return; 			}		}	}	cout << "---退选失败！---";	cout << endl; }//class of Courseint Course::inputCourse() {	int count = 0;	string cid;		string cname;	int csum;	ifstream fin;	fin.open("D:\\course.txt");	//没有文件就创建文件	if(!fin) {		outputCourse();		return 0;	//返回0个课程数	}	//过滤字段名	string temp;	fin >> temp;	fin >> temp;	fin >> temp;	for(int i = 0; i < C_SUM; i++){		fin >> cid; 		fin >> cname;		fin >> csum;		if (fin.get() == EOF)			break;		course[i].init(cid, cname, csum);		count++;	}	return count;}void Course::outputCourse() {	ofstream fout;	fout.open("D:\\course.txt", ios::trunc|ios::in);	if(!fout) {cout<<"写入数据失败！";return;}	fout << "课程id" << "\t"		<<	"课程名"	<< "\t"		<<	"剩余数"	<< "\t";	fout << endl; 	for(int i = 0; i < courseSum; i++){		//只将未被标记删除的课程导入文件		if( course[i].cid != "deleted") {			fout << course[i].cid << "\t"				<< course[i].cname << "\t"				<< course[i].csum << endl;		}	}	fout.close();}void Course::init(string cid, string cname, int csum) {	this -> cid = cid;	this -> cname = cname;	this -> csum = csum;}void Course::printHead() {	cout << endl;	cout << "课程id" << "\t"		<<	"课程名"	<< "\t"		<<	"剩余数"	<< "\t";	cout << endl;}void Course::add() {	course[courseSum].cid = cid;	course[courseSum].cname = cname;	course[courseSum].csum = csum;	Course::courseSum++;	outputCourse();}void Course::del() {	bool flg = false;	string flg0;	//先找到要被删除的课程在对象数组中的位置	for(int i = 0; i < courseSum; i++) {		if(cid == course[i].cid ) {			//二次确认			cout << endl;			cout << "---你确定要删除课程：" << cid << "，" << course[i].cid << "。---";			cout << endl;			cout << "---输入Y确定---";			cout << endl;			cin >> flg0;			if(flg0 == "Y" || flg0 == "y") {				//将被删除课程的cid标记为deleted				course[i].cid = "deleted";				//课程总数-1				Course::courseSum--;					//使删除后的课程覆盖到对象数组中				outputCourse();				inputCourse();					flg = true;				cout << endl;				cout << "---删除课程信息成功！---";				cout << endl;				break;			} else {				break;			}		}	}	if(flg == false) {		cout << endl;		cout << "---删除课程信息失败！---";		cout << endl;	}}void Course::find() {	cout << cid << "\t"		<< cname << "\t"		<< csum << "\t";	cout << endl;}void Course::setCid() {	cout << endl;	string cid;	for(int i = 0; i < courseSum; i++) {		//注意this		if(this -> cid == course[i].cid) {back1:			cout << "请输入新的课程号：";			cin >> cid;			//学号不能重复的输入合法性检查			for(int i = 0; i < Course::courseSum; i++) {				if(cid == course[i].cid ) {					cout<< endl						<< "---课程号不能重复，请重新输入！---"						<< endl;					goto back1;				}			}			course[i].cid = cid;			break;		}	}	outputCourse();	inputCourse();	cout << "---课程号修改成功！---" <<endl;}void Course::setCname() {	cout << endl;	string cname;	for(int i = 0; i < courseSum; i++) {		if(this -> cname == course[i].cname) {			cout << "请输入新的课程号：";			cin >> cname;			course[i].cname = cname;			break;		}	}	outputCourse();	inputCourse();	cout << "---课程名修改成功！---" <<endl;}void Course::setCsum() {	cout << endl;	int csum;	for(int i = 0; i < courseSum; i++) {		if(this -> csum == course[i].csum) {			cout << "请输入新的课程数：";			cin >> csum;			course[i].csum = csum;			break;		}	}	outputCourse();	inputCourse();	cout << "---课程数修改成功！---" <<endl;}void Course::display() {	printHead();	//遍历数组，赋值给temp，调用temp对象find()函数进行输出	Course temp;	for(int i = 0; i < courseSum; i++){		temp = course[i];		temp.find();	} }//主函数用来做界面显示和函数调用void main() {		/*	Teacher t;//	t.addStudent();//	t.findStudent();//	Student::login();//	Teacher::printHead();//	t.delStudent();	t.setStudent();	Student::display();	Teacher::outputTeacher();	Student::outputStudent();	*///	Course::display();		Student stu;	Teacher tea;//	tea.addCourse();//	tea.setCourse();	int flg;	bool result;	do{menu0:		cout<<"┌───────────┐"<<endl			<<"│     学生成绩管理     │"<<endl			<<"│      和选课系统      │"<<endl			<<"│     选择登录类型     │"<<endl			<<"├───────────┤"<<endl			<<"│     1.学生登录       │"<<endl			<<"│     2.教师登录       │"<<endl			<<"├———————————┤"<<endl			<<"│     3.退出系统       │"<<endl			<<"└───────────┘"<<endl;		cout<<"请输入操作编号：";		cin>>flg;		switch (flg)		{		case(1):			system("cls");			//判断登录是否成功			result = false;			result = stu.login();			if(result) {goto menu1;}			break;		case(2):			system("cls");			//判断登录是否成功			result = false;			result = tea.login();			if(result) {goto menu2;}			break;		case(3):			cout<<endl;			cout<<"┌───────────┐"<<endl				<<"│      感谢使用！      │"<<endl				<<"└───────────┘"<<endl;			getchar();getchar();			return;		default:			system("cls");			cout<<endl<<"───输入有误，请重新输入！───"<<endl<<endl;			goto menu0;			break;		}	}while(1);menu1:	do{		cout<<"┌───────────┐"<<endl			<<"│     学生成绩管理     │"<<endl			<<"│      和选课系统      │"<<endl			<<"│    学生操作主菜单    │"<<endl			<<"├───────────┤"<<endl			<<"│   1.查询成绩和选课   │"<<endl			<<"│      2.学生选课      │"<<endl			<<"│      3.退选课程      │"<<endl			<<"│      4.更改密码      │"<<endl			<<"├———————————┤"<<endl			<<"│      5.退出登录      │"<<endl			<<"└───────────┘"<<endl;		cout<<"请输入操作编号：";		cin>>flg;		switch (flg)		{		case(1):			system("cls");			stu.showMyInfo();			break;		case(2):			system("cls");			stu.chooseCourse();			break;		case(3):			system("cls");			stu.delCourse();			break;		case(4):			system("cls");			stu.setSpassword();			break;		case(5):			system("cls");			goto menu0;			return;		default:			system("cls");			cout<<endl<<"───输入有误，请重新输入！───"<<endl<<endl;			goto menu1;			break;		}	}while(1);menu2:	do{		cout<<"┌───────────┐"<<endl			<<"│     学生成绩管理     │"<<endl			<<"│      和选课系统      │"<<endl			<<"│    教师操作主菜单    │"<<endl			<<"├───────────┤"<<endl			<<"│      1.学生管理      │"<<endl			<<"│      2.选课管理      │"<<endl			<<"├———————————┤"<<endl			<<"│    3.显示我的信息    │"<<endl			<<"│      4.更改密码      │"<<endl			<<"├———————————┤"<<endl			<<"│      5.退出登录      │"<<endl			<<"└───────────┘"<<endl;		cout<<"请输入操作编号：";		cin>>flg;		switch (flg)		{		case(1):			system("cls");			goto menu21;			break;		case(2):			system("cls");			tea.setCourse();			break;		case(3):			system("cls");			tea.showMyInfo();			break;		case(4):			system("cls");			tea.setpassword();			break;		case(5):			system("cls");			goto menu0;			break;		default:			system("cls");			cout<<endl<<"───输入有误，请重新输入！───"<<endl<<endl;			goto menu2;			break;		}	}while(1);menu21:	do{		cout<<"┌───────────┐"<<endl			<<"│     学生成绩管理     │"<<endl			<<"│      和选课系统      │"<<endl			<<"│    教师操作主菜单    │"<<endl			<<"│      /学生管理       │"<<endl			<<"├───────────┤"<<endl			<<"│    1.查询学生信息    │"<<endl			<<"│    2.修改学生信息    │"<<endl			<<"│    3.增加学生信息    │"<<endl			<<"│    4.删除学生信息    │"<<endl			<<"│  5.显示所有学生信息  │"<<endl			<<"├———————————┤"<<endl			<<"│      6.退出登录      │"<<endl			<<"└───────────┘"<<endl;		cout<<"请输入操作编号：";		cin>>flg;		switch (flg)		{		case(1):			system("cls");			tea.findStudent();			break;		case(2):			system("cls");			tea.setStudent();			break;		case(3):			system("cls");			tea.addStudent();			break;		case(4):			system("cls");			tea.delStudent();			break;		case(5):			system("cls");			Student::display();			goto menu25;			break;		case(6):			system("cls");			goto menu0;			break;		default:			system("cls");			cout<<endl<<"───输入有误，请重新输入！───"<<endl<<endl;			goto menu21;			break;		}	}while(1);menu25:	do{		cout<<"┌───────────┐"<<endl			<<"│     学生成绩管理     │"<<endl			<<"│      和选课系统      │"<<endl			<<"│      /学生管理       │"<<endl			<<"│   /查询学生信息菜单  │"<<endl			<<"├───────────┤"<<endl			<<"│    1.升序排列成绩    │"<<endl			<<"│    2.降序排列成绩    │"<<endl			<<"│    3.学号排列成绩    │"<<endl			<<"│   4.列出不及格名单   │"<<endl			<<"├———————————┤"<<endl			<<"│    5.返回上级菜单    │"<<endl			<<"└───────────┘"<<endl;		cout<<"请输入操作编号：";		cin>>flg;		switch (flg)		{		case(1):			system("cls");			Student::sortByASC();			Student::display();			break;		case(2):			system("cls");			Student::sortByDESC();			Student::display();			break;		case(3):			system("cls");			Student::sortBySid();			Student::display();			break;		case(4):			system("cls");			Student::selectFail();			break;		case(5):			system("cls");			goto menu2;			return;		default:			system("cls");			cout<<endl<<"───输入有误，请重新输入！───"<<endl<<endl;			goto menu25;			break;		}	}while(1);}