Student course selection system (curriculum design of Shandong Agricultural University)

#include <iostream>
#include <string>
#include <cstring>
#include <fstream>
#include <cstdlib>
#include <windows.h>
const int INC=20;
using namespace std;
class Course{
// Course number 、 Course name 、 credits 、 Total class hours 、 Theoretical hours 、 Experimental hours 、 The first semester 、 Start and end weeks 、 Class capacity 、 The number of students who choose courses （ For the initial 0）
private:
	string num;
	string title;
	float credit;
	int period;
	int theory_period;
	int experiment_period;
	string term;
	string week;
	int course_people;
	int people;
public:
    Course(string num0="BF002345",string title0="Web3D technology ",float credit0=3,
         int period0=54,int theory_period0=28,int experiment_period0=26,string term0="2016-2017-1",string week0="1-14",int course_people0=9,int people0=0)
         {  num=num0;title=title0;credit=credit0;period=period0;theory_period=theory_period0;experiment_period=experiment_period0;term=term0;week=week0;course_people=course_people0;people=people0;}
    void setNum(string num0){num=num0;}
    void setTitle(string title0){title=title0;}
    void setCredit(float credit0){credit=credit0;}
    void setPeriod(int period0){period=period0;}
    void setTheory_period(int theory_period0){theory_period=theory_period0;}
    void setExperiment_period(int experiment_period0){experiment_period=experiment_period0;}
    void setTerm(string term0){term=term0;}
    void setWeek(string week0){week=week0;}
    void setCourse_people(int course_people0){course_people=course_people0;}
    void setPeople(int people0){people=people0;}
    string getNum(){return num;}
    string getTitle(){return title;}
    float getCredit(){return credit;}
    int getPeriod(){return period;}
    int getTheory_period(){return theory_period;}
    int getExperiment_period(){return experiment_period;}
    string getTerm(){return term;}
    string getWeek(){return week;}
    int getCourse_people(){return course_people;}
    int getPeople(){return people;}
    void dispACourse(){
        cout <<num<< '\t'<<title<< '\t'<<credit<< '\t'<<period<< '\t'<<theory_period<< '\t'<<experiment_period<< '\t'<<term<< '\t'<<week<< '\t'<<course_people<< '\t'<<people<<'\n';
}
    friend class InCourse;
    friend class StudentSelectCourse;
};
class Student{
// Student number 、 full name 、 college 、 Professional class 
private:
	string num;
	string name;
	string college;
	string classno;
public:
    Student(string num0="20136954",string name0=" Tang Wu ",string college0=" School of resources and environment ",string classno0=" In the letter 13-1"){
    num=num0;name=name0;college=college0; classno=classno0;}
    void setNum(string num0){num=num0;}
    void setName(string name0){name=name0;}
    void setCollege(string college0){college=college0;}
    void setClassno(string classno0){classno=classno0;}
    string getNum(){return num;}
    string getName(){return name;}
    string getCollege(){return college;}
    string getClassno(){return classno;}
    void dispAStudent(){
        cout <<num<< '\t'<<name<< '\t'<<college<< '\t'<<classno<< '\n';
    }
    friend class Instudent;
    friend class StudentSelectCourse;
};
class SelectCourse{
// Student number 、 full name 、 college 、 Course number 、 Course name 、 The first semester 、 Deselect flag （0- Selected ,1- Selection ）
private:
	string num;
	string name;
	string coursenum;
	string coursetitle;
	string term;
	int choice;
public:
	SelectCourse(string num0="20132947",string name0=" Li Guihua ",string coursenum0="BF002345",
            string coursetitle0="Web3D technology ",string term0="2016-2017-1",int choice0=0)
        {
                num=num0;name=name0;coursenum=coursenum0;coursetitle=coursetitle0;term=term0;choice=choice0;
	}
    void setNum(string num0){num=num0;}
    void setName(string name0){name=name0;}
    void setCourseNum(string coursenum0){coursenum=coursenum0;}
    void setCourseTitle(string coursetitle0){coursetitle=coursetitle0;}
    void setTerm(string term0){term=term0;}
    void setChoice(int choice0){choice=choice0;}
    string getNum(){return num;}
    string getName(){return name;}
    string getCourseNum(){return coursenum;}
    string getCourseTitle(){return coursetitle;}
    string getTerm(){return term;}
    int getChoice(){return choice;}
    void dispSelectCourse(){
        cout <<num<< '\t'<<name<< '\t'<< '\t'<<coursenum<< '\t'<<coursetitle<< '\t'<<term<<'\t'<<choice<<'\n';
    }
    friend class InSelectCourse;
    friend class StudentSelectCourse;
};
class InCourse{
    public:
    Course *course;int coursecount;
void write2Coursefile(){
    string num;
	string title;
	float credit;
	int period;
	int theory_period;
	int experiment_period;
	string term;
	string week;
	int course_people;
	int people;
    ofstream outf( "course.txt", ios::out ) ;
    // The file name written should be the same as the file name read ; When debugging, you can take different file names , To avoid overwriting the original file 
    if ( !outf )
      { cerr << "File could not be open." << endl ;  }
    outf<<" Course information \n";
    for(int i=0;i<coursecount;i++)
    {
        outf<<course[i].getNum()<< '\t'<<course[i].getTitle()<< '\t';
        outf<<course[i].getCredit()<< '\t'<<course[i].getPeriod()<< '\t';
        outf<<course[i].getTheory_period()<<'\t'<<course[i].getExperiment_period()<<'\t';
        outf<<course[i].getTerm()<< '\t'<<course[i].getWeek()<< '\t' ;
        outf<<course[i].getCourse_people()<< '\t'<<course[i].getPeople()<< '\n' ;
      }
    outf.close() ;
    }
int incourseFile( char * fileName, int delLine)
{
    int i;
    string num;
	string title;
	float credit;
	int period;
	int theory_period;
	int experiment_period;
    string term;
	string week;
	int course_people;
	int people;
    ifstream inf( fileName, ios::in ) ;
    if ( !inf )
      { cerr << "File could not be open." << endl ; return 1;   }
  char s[80];
  int a;
  float b;
  for ( i=1; i <= delLine; i++ )
      inf.getline( s,80 ) ;
  i=0;
  while( inf>>num>>title>>credit>>period>>theory_period>>experiment_period>>term>>week>>course_people>>people )  //{ inf.getline( s, 80 ) ;    cout << s << endl ; }
  {

      //inf,getchar();

      if(title.length()>0)       i++;

  }
    coursecount=i;
    //cout<<coursecount<<endl;
    inf.clear();
    inf.seekg(0,ios::beg);
    for ( i=1; i <= delLine; i++ )
      inf.getline( s, 80 ) ;
    course=new Course[coursecount+INC];
    for ( i=0; i <coursecount; i++ )
      {

            inf>>num>>title>>credit>>period>>theory_period>>experiment_period>>term>>week>>course_people>>people;
      if(title.length()>0){
        if(num[0]==10) num=num.substr(1);
        course[i]=Course();
        course[i].setNum(num);
        course[i].setTitle(title);
        course[i].setCredit(credit);
        course[i].setPeriod(period);
        course[i].setTheory_period(theory_period);
        course[i].setExperiment_period(experiment_period);
        course[i].setTerm(term);
        course[i].setWeek(week);
        course[i].setCourse_people(course_people);
        course[i].setPeople(people);
        }
      }
  inf.close() ;
  return coursecount;
  }
  friend class StudentSelectCourse;
  int addcourse(string num,string title,float credit,int period,int theory_period,int experiment_period,string term,string week,int course_people,int people){
        int i=coursecount;
        course[i]=Course();
        course[i].setNum(num);
        course[i].setTitle(title);
        course[i].setCredit(credit);
        course[i].setPeriod(period);
        course[i].setTheory_period(theory_period);
        course[i].setExperiment_period(experiment_period);
        course[i].setTerm(term);
        course[i].setWeek(week);
        course[i].setCourse_people(course_people);
        course[i].setPeople(people);
        ++coursecount;
        return coursecount;
      }
    void searchcoursebynum(string num){// Fuzzy Lookup contains num String of 
        bool found=false;
        for(int i=0;i<coursecount;i++)
        if((course[i].getNum()).find(num)!= string::npos) {
            //cout<<course[i].getNum()<< course[i].getNum().find(num)<<endl;
            cout<<i<<"\t";
            course[i].dispACourse();
            found=true;
   //         return i;
            }
        if(!found)cout<<"course num:"<<num<<" not found."<<endl;
   //         return -1;
        }
    int searchcoursebynump(string num){// Exact search equals num String of 
        for(int i=0;i<coursecount;i++)
        if((course[i].getNum())==num) {
            //cout<<course[i].getNum()<< course[i].getNum().find(num)<<endl;
            cout<<i<<"\t";
            course[i].dispACourse();
            return i;
            }
            return -1;
        }
     void searchcoursebytitle(string title){
        bool found=false;
        for(int i=0;i<coursecount;i++)
        if((course[i].getTitle()).find(title)!= string::npos) {
            //cout<<course[i].getTitle()<< course[i].getTitle().find(title)<<endl;
            cout<<i<<"\t";
            course[i].dispACourse();
            found=true;
            //return i;
            }
            if(!found)cout<<"course title:"<<title<<" not found."<<endl;
            //return -1;
        }
    int searchcoursebytitlep(string title){
        for(int i=0;i<coursecount;i++)
        if(course[i].getTitle()==title) {
            //cout<<course[i].getTitle()<< course[i].getTitle().find(title)<<endl;
            cout<<i<<"\t";
            course[i].dispACourse();
            return i;
            }
            cout<<"course title:"<<title<<" not found."<<endl;
            return -1;
        }
    void sortcoursebynum(){
        for(int i=0;i<coursecount;i++){
            int k=i;
            for(int j=i+1;j<coursecount;j++)
                if(course[j].getNum()<course[k].getNum()) k=j;
            //cout<<k<<" k&i "<<i<<" :"<<course[i].getNum()<<"---"<<course[k].getNum()<<endl;
            if(k!=i){
                Course t=course[i];course[i]=course[k];course[k]=t;
                }
            }
        }
    void sortcoursebytitle(){
        for(int i=0;i<coursecount;i++){
            int k=i;
            for(int j=i+1;j<coursecount;j++)
                if(course[j].getTitle()<course[k].getTitle()) k=j;
            if(k!=i){
                Course t=course[i];course[i]=course[k];course[k]=t;
                }
            }
        }
    void changecoursebynum(string oldnum,string newnum){
        int k=searchcoursebynump(oldnum);
        if(k>=0)    {
            course[k].setNum(newnum);
            cout<<"changecoursebynum successed:"<<endl;
            course[k].dispACourse();
        }
        else cout<<"changecourse failed. No course of num="<<oldnum<<endl;
        }
    void deletecoursebynum(string num){
        int k=searchcoursebynump(num);
        if(k>=0)    {
            cout<<"Course to be deleted :"<<endl;
            course[k].dispACourse();
            course[k]=course[coursecount-1];
            cout<<"deletecoursebynum successed:"<<endl;
            coursecount--;
            //return coursecount;
        }
        else cout<<"deletecourse  failed. No course of num="<<num<<endl;
        }

    void changecoursebytitle(string oldtitle,string newtitle){
        int k=searchcoursebytitlep(oldtitle);
        if(k>=0)    {
            course[k].setTitle(newtitle);
            cout<<"changecoursebytitle successed:"<<endl;
            course[k].dispACourse();
        }
        else cout<<"changecourse failed. No course of title="<<oldtitle<<endl;
        }

    void deletecoursebytitle(string title){
        int k=searchcoursebytitlep(title);
        if(k>=0)    {
            cout<<"Course to be deleted :"<<endl;
            course[k].dispACourse();
            course[k]=course[coursecount-1];
            cout<<"deletecoursebytitle successed:"<<endl;
            coursecount--;
            //return bookcount;
        }
        else cout<<"deletecourse  failed. No course of title="<<title<<endl;

        }
};
class InStudent{
    public:
    Student *student;int studentcount;
    string a[100];
    void write2Studentfile(){

        }
int instudentFile( char * fileName, int delLine)
{
    string num,name,college,classno;
    int i;
    ifstream inf( fileName, ios::in ) ;
  if ( !inf )
      { cerr << "File could not be open." << endl ; return 1;   }
  char s[80];
  for ( i=1; i <= delLine; i++ )
      inf.getline( s, 80 ) ;
  i=0;
  while( !inf.eof() )  //{ inf.getline( s, 80 ) ;    cout << s << endl ;  }
  {
      inf.getline( s, 80,'\t' ) ;//num=s;
      inf.getline( s, 80,'\t' ) ;name=s;
      inf.getline( s, 80,'\t' ) ;//college=s;
      inf.getline( s, 80 ) ;//classno=s;
      if(name.length()>0)        i++;
      }
  studentcount=i;
  //cout<<studentcount<<endl;
    inf.clear();
    inf.seekg(0,ios::beg);
    for ( i=1; i <= delLine; i++ )
      inf.getline( s, 80 ) ;
    student=new Student[studentcount+INC];
    for ( i=0; i <studentcount; i++ )
      {
      inf.getline( s, 80,'\t' ) ;num=s;
      inf.getline( s, 80,'\t' ) ;name=s;
      inf.getline( s, 80,'\t' ) ;college=s;
      inf.getline( s, 80 ) ;classno=s;
      if(name.length()>0){
          if(num[0]==10)num=num.substr(1);
        student[i]=Student();
        student[i].setNum(num);
        student[i].setName(name);
        student[i].setCollege(college);
        student[i].setClassno(classno);
        }
      }
  inf.close() ;
  return studentcount;

  }
    int addstudent(string num,string name,string college,string classno){
        int i=studentcount;
        student[i]=Student();
        student[i].setNum(num);
        student[i].setName(name);
        student[i].setCollege(college);
        student[i].setClassno(classno);
        ++studentcount;
        return studentcount;
      }
      // Query student information through student number 
   void searchstudentbynum(string num){
        bool found=false;
        for(int i=0;i<studentcount;i++)
        if((student[i].getNum()).find(num)!= string::npos) {
            cout<<i<<"\t";
            student[i].dispAStudent();
            found=true;
            //return i;
            }
        if(!found)cout<<"student of num: "<<num<<" not found"<<endl;
            //return -1;
        }
   int searchstudentbynump(string num){
        for(int i=0;i<studentcount;i++)
        if(student[i].getNum()==num) {
            cout<<i<<"\t";
            student[i].dispAStudent();
            return i;
            }
            return -1;
        }
        // Search for student information by name 
    void searchstudentbyname(string name){
        bool found=false;
        for(int i=0;i<studentcount;i++)
        if((student[i].getName()).find(name)!= string::npos) {
            //cout<<student[i].getName()<< student[i].getName().find(name)<<endl;
            cout<<i<<"\t";
            student[i].dispAStudent();
            found=true;
            //return i;
            }
            if(!found)cout<<"student name:"<<name<<" not found."<<endl;
            //return -1;
        }
    int searchstudentbynamep(string name){
        for(int i=0;i<studentcount;i++)
        if(student[i].getName()==name) {
            //cout<<student[i].getName()<< student[i].getName().find(Name)<<endl;
            cout<<i<<"\t";
            student[i].dispAStudent();
            return i;
            }
            cout<<"student name:"<<name<<" not found."<<endl;
            return -1;
        }
        // Query student information through professional classes 
    void searchstudentbyclassno(string classno){
        bool found=false;
        for(int i=0;i<studentcount;i++)
        if((student[i].getClassno()).find(classno)!= string::npos) {
            cout<<i<<"\t";
            student[i].dispAStudent();
            found=true;
            //return i;
            }
        if(!found)cout<<"student of classno: "<<classno<<" not found"<<endl;
            //return -1;
        }
   int searchstudentbyclassnop(string classno){
        for(int i=0;i<studentcount;i++)
        if(student[i].getClassno()==classno) {
            cout<<i<<"\t";
            student[i].dispAStudent();
            return i;
            }
            return -1;
        }

        // Sort student information in ascending order by student number 
    void sortstudentbynum(){
        for(int i=0;i<studentcount;i++){
            int k=i;
            for(int j=i+1;j<studentcount;j++)
                if(student[j].getNum()<student[k].getNum()) k=j;
            //cout<<k<<" k&i "<<i<<" :"<<student[i].getNum()<<"---"<<student[k].getNum()<<endl;
            if(k!=i){
                Student t=student[i];student[i]=student[k];student[k]=t;
                }
            }
        }
        // Sort student information in ascending order by College 
    void sortstudentbycollege(){
        for(int i=0;i<studentcount;i++){
            int k=i;
            for(int j=i+1;j<studentcount;j++)
                if(student[j].getCollege()<student[k].getCollege()) k=j;
            if(k!=i){
                Student t=student[i];student[i]=student[k];student[k]=t;
                }
            }
        }
        // By student number + Name modify student information 
    void changestudentbynumname(string oldnum,string oldname,string newnum,string newname){
        int k=searchstudentbynump(oldnum);
        int j=searchstudentbynamep(oldname);
        if(k>=0&&j>=0)    {
            student[k].setNum(newnum);
            student[j].setName(newname);
            cout<<"changestudentbynum+name successed:"<<endl;
            student[k].dispAStudent();
        }
        else cout<<"changestudent failed. No reader of num+name="<<oldnum<<" "<<oldname<<endl;
        }
        // By student number + Name delete student information 
    void deletestudentbynumname(string num,string name){
        int k=searchstudentbynump(num);
        int j=searchstudentbynamep(name);
        if(k>=0&&j>=0)    {
            cout<<"Student to be deleted :"<<endl;
            student[j].dispAStudent();
            student[j]=student[studentcount-1];
            cout<<"deletestudentbynumname successed:"<<endl;
            studentcount--;
            //return studentcount;
        }
    }
  friend class StudentSelectCourse;
};
class InSelectCourse{
    public:
    SelectCourse *selectcourse;int selectcoursecount;
 void write2SelectCoursefile(){

        }
int inselectcourseFile( char * fileName, int delLine)
{
    string num,name,coursenum,coursetitle,term;
	int choice;
    int i;
    ifstream inf( fileName, ios::in ) ;
  if ( !inf )
      { cerr << "File could not be open." << endl ; return 1;   }
  char s[80];
  for ( i=1; i <= delLine; i++ )
      inf.getline( s, 80 ) ;
  i=0;
  while( !inf.eof() )
  {
      inf.getline( s, 80,'\t') ;
      inf.getline( s, 80,'\t' ) ;
      inf.getline( s, 80,'\t' ) ;
      inf.getline( s, 80,'\t' ) ;
      inf.getline( s, 80 ) ;
      inf>>choice;
      if(strlen(s)>1)        i++;
      }
 selectcoursecount=i;
  //cout<<selectcoursecount<<endl;
    inf.clear();
    inf.seekg(0,ios::beg);
    for ( i=1; i <= delLine; i++ )
      inf.getline( s, 80 ) ;
    selectcourse=new SelectCourse[selectcoursecount+INC];
    for ( i=0; i <selectcoursecount; i++ )
      {
      inf.getline( s, 80,'\t' ) ;num=s;
      inf.getline( s, 80,'\t' ) ;name=s;
      inf.getline( s, 80,'\t' ) ;coursenum=s;
      inf.getline( s, 80,'\t' ) ;coursetitle=s;
      inf.getline( s, 80,'\t' ) ;term=s;
      inf>>choice;
      if(name.length()>0){
          if(num[0]==10)num=num.substr(1);
        selectcourse[i]=SelectCourse();
        selectcourse[i].setNum(num);
        selectcourse[i].setName(name);
        selectcourse[i].setCourseNum(coursenum);
        selectcourse[i].setCourseTitle(coursetitle);
        selectcourse[i].setTerm(term);
        selectcourse[i].setChoice(choice);
        }
      }
  inf.close() ;
  return selectcoursecount;
  }
  void searchbynum(string num){
        bool found=false;
        for(int i=0;i<selectcoursecount;i++)
        if((selectcourse[i].getNum()).find(num)!= string::npos) {
            //cout<<selectcourse[i].getNum()<< selectcourse[i].getNum().find(num)<<endl;
            cout<<i<<"\t";
            selectcourse[i].dispSelectCourse();
            found=true;
            //return i;
            }
            if(!found)cout<<"selectcourse num:"<<num<<" not found."<<endl;
            //return -1;
        }
    int searchbynump(string num){
        for(int i=0;i<selectcoursecount;i++)
        if(selectcourse[i].getNum()==num) {
            //cout<<selectcourse[i].getNum()<< selectcourse[i].getNum().find(num)<<endl;
            cout<<i<<"\t";
            selectcourse[i].dispSelectCourse();
            return i;
            }
            cout<<"selectcourse num:"<<num<<" not found."<<endl;
            return -1;
        }
    void searchbycoursenum(string coursenum){
        bool found=false;
        for(int i=0;i<selectcoursecount;i++)
        if((selectcourse[i].getCourseNum()).find(coursenum)!= string::npos) {
            //cout<<selectcourse[i].getCourseNum()<< selectcourse[i].getCourseNum().find(coursenum)<<endl;
            cout<<i<<"\t";
            selectcourse[i].dispSelectCourse();
            found=true;
            //return i;
            }
            if(!found)cout<<"selectcourse coursenum:"<<coursenum<<" not found."<<endl;
            //return -1;
        }
    int searchbycoursenump(string coursenum){
        for(int i=0;i<selectcoursecount;i++)
        if(selectcourse[i].getCourseNum()==coursenum) {
            //cout<<selectcourse[i].getCourseNum()<< selectcourse[i].getNum().find(coursenum)<<endl;
            cout<<i<<"\t";
            selectcourse[i].dispSelectCourse();
            return i;
            }
            cout<<"selectcourse coursenum:"<<coursenum<<" not found."<<endl;
            return -1;
        }
    void searchbyclassno(string classno){
        int i,k;
        InStudent b;
        b.instudentFile("student.txt",1);
        int j=0;
        for(i=0;i<b.studentcount;i++){
        if((b.student[i].getClassno()).find(classno)!= string::npos) {
            b.a[j]=b.student[i].getNum();
            j++;
            }
        }
        if(j==0)
            cout<<" Students in this major class have no record of course selection "<<endl;
        for(int k=0;k<j;k++)
        searchbynum(b.a[k]);

    }
};
class StudentSelectCourse{
    InCourse cr;
    InStudent st;
    InSelectCourse sc;
    public:
    void write2file(){
        cr.write2Coursefile();
        st.write2Studentfile();
        sc.write2SelectCoursefile();

        }
    void init(){
        cr.incourseFile( "course.txt", 1);
        st.instudentFile( "student.txt", 1);
        sc.inselectcourseFile( "studcourse.txt", 1);
        }
    void dispCourse(){
        for ( int i=0; i <cr.coursecount; i++ )
            {cout<<i<<":";
            cr.course[i].dispACourse();}
        }
    void dispStudent(){
        for ( int i=0; i <st.studentcount; i++ )
            {cout<<i<<":";
            st.student[i].dispAStudent();}
        }
    void dispSelectCourse(){
        for ( int i=0; i <sc.selectcoursecount; i++ )
            {cout <<i<<":";
            sc.selectcourse[i].dispSelectCourse();}
          }
    void dispCount(){
        cout<<cr.coursecount<<endl;
        cout<<st.studentcount<<endl;
        cout<<sc.selectcoursecount<<endl;
        }
    void addcourse(){
        string num,title,term,week;
        float credit;
	int period,theory_period,experiment_period,course_people,people;
        char num0[80],tit[80],ter[80],wee[80];
        cout<<" Course number 、 Course name 、 Course nature 、 Total class hours 、 Theoretical hours 、 Experimental hours 、 The first semester 、 Start and end weeks 、 Class capacity 、 The number of students who choose courses "<<endl;
        string num1="BF002357",title0=" Big data analysis ",term0="11-14",week0=" tsinghua university press ";
        float credit0=2.5;
        int period0=54;
        int theory_period0=27;
        int experiment_period0=27;
        int course_people0=45;
        int people0=25;
        cr.addcourse(num1,title0,credit0,period0,theory_period0,experiment_period0,term0,week0,course_people0,people0);

        int i=cr.coursecount-1;
        cout <<i<<":";
        cr.course[i].dispACourse();
        }
    void addstudent(){
        string num,name,college,classno;
        char num0[80],nam[80],coll[80],clas[80];
        cout<<" Student number 、 full name 、 college 、 Professional class :"<<endl;

        string num1="20151000",name0=" Wang Tao ",college0="computer",class0="network class 1";
        st.addstudent(num1,name0,college0,class0);
        int i=st.studentcount-1;
        cout <<i<<":";
        st.student[i].dispAStudent();
        }
    void searchcourse(){
        cout<<"2． Course information query ： According to the course number 、 Course name, etc ."<<endl;
        char tit[80];
        string num="BF002345", title="Web3D technology ";
        int i,j,k,select;
        while(1){
            cout<<" Course information query ："<<endl;
            cout<<"1． Query by course number "<<endl;
            cout<<"2． Query by course name "<<endl;
            cout<<"0. return"<<endl;
            cin>>select;
            cin.get();
            switch(select){
                case 1:
                    cout<<" Course number :";
                    getline(cin,num,'\n');
                    cr.searchcoursebynum(num);
                    break;
                case 2:
                    cout<<" Course name :";
                    getline(cin,title,'\n');
                    cr.searchcoursebytitle(title);
                    break;
                case 0:return;
            }
        }
        }
    void sortcourse(){
        int select;
        cout<<"3． Course information sorting ： By course number 、 Course names are sorted in ascending order ."<<endl;
        cout<<" Course information sorting ："<<endl;
        cout<<"1． Sort by course number "<<endl;
        cout<<"2． Sort by course name "<<endl;
        cout<<"0. return"<<endl;
        cin>>select;
        switch(select){
            case 1:
                    cout<<" Course number :";
                    cr.sortcoursebynum();
                    dispCourse();
                    break;
            case 2:
                    cout<<" Course name :";
                    cr.sortcoursebytitle();
                    dispCourse();
                    break;
            case 0:return;
            }
        }
    void editcourse(){
        string oldnum="BF002345",oldtitle="Web3D technology ",newnum="BF002357",newtitle="Linux operating system ";
        int select;
        cout<<"4． Modification of course information 、 Delete ： By course number 、 Modify and delete the course name ."<<endl;
        while(1){
        cout<<" Modification of course information 、 Delete ："<<endl;
        cout<<"1． Modify according to the course number "<<endl;
        cout<<"2． Delete by course number "<<endl;
        cout<<"3． Modify by course name "<<endl;
        cout<<"4． Delete by course name "<<endl;
        cout<<"0. return"<<endl;
        cin>>select;
        cin.get();
        switch(select){
            case 1:
                    cout<<"old Course number :";
                    getline(cin,oldnum,'\n');
                    cout<<"new Course number :";
                    getline(cin,newnum,'\n');
                    cout<<"changecoursebynum: "<<oldnum<<" to "<<newnum<<endl;
                    cr.changecoursebynum(oldnum,newnum);
                    //dispCourse();
                    break;
            case 2:
                    cout<<"delete Course number :";
                    getline(cin,oldnum,'\n');
                    cout<<"delete Course number :"<<oldnum<<endl;
                    cr.deletecoursebynum(oldnum);
                    //dispcourse();
                    break;
            case 3:
                    cout<<"old Course name :";
                    getline(cin,oldtitle,'\n');
                    cout<<"new Course name :";
                    getline(cin,newtitle,'\n');
                    cout<<"changecoursebytitle: "<<oldtitle<<" to "<<newtitle<<endl;
                    cr.changecoursebytitle(oldtitle,newtitle);
                    //dispCourse();
                    break;
            case 4:
                    cout<<"delete Course name :";
                    getline(cin,oldtitle,'\n');
                    cout<<"deletecoursebytitle: "<<oldtitle<<endl;
                    cr.deletecoursebytitle(oldtitle);
                    //dispCourse();
                    break;
            case 0:return;
            }
        }
    }
        void searchstudent(){
        cout<<"6． Student information inquiry ： By student number 、 full name 、 Professional classes, etc ."<<endl;
        char tit[80];
        string num="20136954",name=" Tang Wu ",classno=" In the letter 13-1";
        int i,j,k,select;
        while(1){
            cout<<" Student information inquiry ："<<endl;
            cout<<"1． By student number "<<endl;
            cout<<"2． Search by name "<<endl;
            cout<<"3． Query by professional class "<<endl;
            cout<<"0. return"<<endl;
            cin>>select;
            cin.get();
            switch(select){
                case 1:
                    cout<<" Student number :";
                    getline(cin,num,'\n');
                    st.searchstudentbynum(num);
                    break;
                case 2:
                    cout<<" full name :";
                    getline(cin,name,'\n');
                    st.searchstudentbyname(name);
                    break;
                case 3:
                    cout<<" Professional class :";
                    getline(cin,classno,'\n');
                    st.searchstudentbyclassno(classno);break;
                case 0:return;
            }
        }
        }
    void sortstudent(){
        int select;
        cout<<"7． Student information ranking ： According to the student id 、 Colleges, etc. are sorted in ascending order ."<<endl;
        cout<<" Reader information sorting ："<<endl;
        cout<<"1． Sort by student number "<<endl;
        cout<<"2． Sort by College "<<endl;
        cout<<"0. return"<<endl;
        cin>>select;
        switch(select){
            case 1:
                    cout<<" Student number :";
                    st.sortstudentbynum();
                    dispStudent();
                    break;
            case 2:
                    cout<<" college :";
                    st.sortstudentbycollege();
                    dispStudent();
                    break;
            case 0:return;
            }
        }
    void editstudent(){
        string oldnum="2015000000",newnum="20076954",oldname="Noname",newname=" Tang Wu ";
        int select;
        cout<<"8． Modification of student information 、 Delete ： According to the student id + Name to modify and delete reader information ."<<endl;
        while(1){
        cout<<" Modification of student information 、 Delete ："<<endl;
        cout<<"1． According to the student id + Name change "<<endl;
        cout<<"2． According to the student id + Name delete "<<endl;
        cout<<"0. return"<<endl;
        cin>>select;
        cin.get();
        switch(select){
            case 1:
                    cout<<"old Student number + full name :";
                    getline(cin,oldnum,'\n');
                    getline(cin,oldname,'\n');
                    cout<<"new Student number + full name :";
                    getline(cin,newnum,'\n');
                    getline(cin,newname,'\n');
                    cout<<"changestudentbynumname: "<<oldnum<<" "<<oldname<<" to "<<newnum<<" "<<newname<<endl;
                    st.changestudentbynumname(oldnum,oldname,newnum,newname);
                    //dispStudent();
                    break;
            case 2:
                    cout<<"delete Student number + full name :";
                    getline(cin,oldnum,'\n');
                    getline(cin,oldname,'\n');
                    cout<<"delete Student number + full name :"<<oldnum<<" "<<oldname<<endl;
                    st.deletestudentbynumname(oldnum,oldname);
                    //dispStudent();
                    break;
            case 0:return;
            }
        }
    }
    void studentselectacourse(){
        cout<<"9． Students' course selection ： Enter the student id + Course number , If the course capacity in the course information table of the course is greater than the number of selected courses , You can choose courses ."<<endl;
        string stnum="20132947",coursenum="BF002345",stname,coursetitle,term;
        int choice;
        int select,stpos,coursepos;
        while(1){
            cout<<" Students' course selection ："<<endl;
            cout<<"1． Course selection "<<endl;
            cout<<"0．return"<<endl;
            cin>>select;
            cin.get();
            if(select==0)return;
            cout<<"select Student number :";
            getline(cin,stnum,'\n');
            cout<<"select Course number :";
            getline(cin,coursenum,'\n');
            coursepos=cr.searchcoursebynump(coursenum);
            stpos=st.searchstudentbynump(stnum);
            if(coursepos>=0&&stpos>=0){
                int hm=cr.course[coursepos].getCourse_people();
                int hn=cr.course[coursepos].getPeople();
                if(hm>hn){
                    stname=st.student[stpos].getName();
                    coursetitle=cr.course[coursepos].getTitle();
                    term=cr.course[coursepos].getTerm();
                    choice=0;
                    cr.course[coursepos].setPeople(hn+1); // Modify the number of selected courses in the course information table 
                    sc.selectcourse[sc.selectcoursecount].setNum(stnum);
                    sc.selectcourse[sc.selectcoursecount].setName(stname);
                    sc.selectcourse[sc.selectcoursecount].setCourseNum(coursenum);
                    sc.selectcourse[sc.selectcoursecount].setCourseTitle(coursetitle);
                    sc.selectcourse[sc.selectcoursecount].setTerm(term);
                    sc.selectcourse[sc.selectcoursecount].setChoice(choice);
                    sc.selectcoursecount++;
                    sc.selectcourse[sc.selectcoursecount-1].dispSelectCourse();
                    cout<<" Successful course selection "<<endl;
                    }
                else cout<<coursenum<<"  Course capacity <= The number of students who choose courses "<<". can't be selected. "<<endl;
                }
            else{
                if(coursepos<0)cout<<"No course "<<coursenum<<". can't select!"<<endl;
                if(stpos<0)cout<<"No student "<<stnum<<". can't select!"<<endl;
            }
        }
    }
    void studentdropacourse(){
        cout<<"10． Student withdrawal ： Enter the student id + Course number , Modify the number of selected courses in the course information table -1, Set the withdrawal of students with this student number from the course in the student selection table "<<endl;
        string stnum="20132947",coursenum="BF002345",stname,coursetitle,term;
        int choice;
        int select,stpos,coursepos,stcoursepos;
        while(1){
            cout<<" Student withdrawal ："<<endl;
            cout<<"1． The drop "<<endl;
            cout<<"0．return"<<endl;
            cin>>select;
            cin.get();
            if(select==0)return;
            cout<<"return Student number :";
            getline(cin,stnum,'\n');
            cout<<"return Course number :";
            getline(cin,coursenum,'\n');
            coursepos=cr.searchcoursebynump(coursenum);
            stpos=st.searchstudentbynump(stnum);
            stcoursepos=sc.searchbynump(stnum);
            if(coursepos>=0&&stpos>=0&&stcoursepos>=0){
                    choice=1;
                    cr.course[coursepos].setPeople(cr.course[coursepos].getPeople()-1);
                    sc.selectcourse[stcoursepos].setChoice(choice);
                    sc.selectcourse[stcoursepos].dispSelectCourse();
                    cout<<" Successful withdrawal "<<endl;

                }
            else{
                if(coursepos<0)cout<<"No course "<<coursenum<<". can't drop!"<<endl;
                if(stpos<0)cout<<"No student "<<stnum<<". can't drop!"<<endl;
            }
        }
        }
        void searchstudentselectcourse(){
        cout<<"11． Student course selection query ： By student number 、 Course number 、 Professional classes, etc ."<<endl;
        char tit[80];
        string num="20136954",coursenum="BF002345",classno=" In the letter 13-1";
        int i,j,k,select;
        while(1){
            cout<<" Student course selection query ："<<endl;
            cout<<"1． By student number "<<endl;
            cout<<"2． Query by course number "<<endl;
            cout<<"3.  Query by professional class "<<endl;
            cout<<"0. return"<<endl;
            cin>>select;
            cin.get();
            switch(select){
                case 1:
                    cout<<" Student number :";
                    getline(cin,num,'\n');
                    sc.searchbynum(num);
                    break;
                case 2:
                    cout<<" Course number :";
                    getline(cin,coursenum,'\n');
                    sc.searchbycoursenum(coursenum);
                    break;
                 case 3:
                    cout<<" Professional class :";
                    getline(cin,classno,'\n');
                    sc.searchbyclassno(classno);
                    break;
                case 0:return;
            }
        }
        }
};
int main()
{
    StudentSelectCourse ssc;
    ssc.init();
    ssc.dispCourse();
    ssc.dispStudent();
    ssc.dispSelectCourse();
    ssc.dispCount();
    int select;
    while(1){
        cout<<" Menu selection function ："<<endl;
        cout<<"1． Add function of course information ： Include course number 、 Course name 、 Course nature 、 Total class hours 、 Theoretical hours 、 Experimental hours 、 The first semester 、 Start and end weeks 、 Class capacity 、 Number of selected courses, etc "<<endl;
        cout<<"2． Course information query ： According to the course number 、 Course name, etc ."<<endl;
        cout<<"3． Course information sorting ： By course number , Sort by course name, etc. in ascending order ."<<endl;
        cout<<"4． Modification of course information 、 Delete ： Course number , Modify and delete books according to the course name ."<<endl;
        cout<<"5． Student information adding function ： Including student ID 、 full name 、 college 、 Professional classes, etc ."<<endl;
       cout<<"6． Student information inquiry ： By student number 、 full name 、 Class, etc ."<<endl;
       cout<<"7． Student information ranking ： According to the student id 、 Colleges, etc. are sorted in ascending order ."<<endl;
       cout<<"8． Modification of student information 、 Delete ： According to the student id + Name to modify and delete student information ."<<endl;
        cout<<"9． Students' course selection ： Enter the student id + Course number , If the course capacity in the course information table of the course is greater than the number of selected courses , You can choose courses , Modify the number of selected courses in the course information table after selecting courses +1, Add the student's course selection in the student's course selection table ."<<endl;
        cout<<"10． Student withdrawal ： Enter the student id + Course number , Look up the student's selection of course number in the student selection table , If there is , Then modify the number of selected courses in the course information table -1, Set the withdrawal of students with this student number from the course in the student selection table （ The deselection flag is set to 1）."<<endl;
       cout<<"11． Student course selection query ： By student number 、 Course number 、 Professional classes, etc ."<<endl;
        cout<<"0.  exit"<<endl;
        cin>>select;
        switch(select){
            case 1:ssc.addcourse();    ssc.dispCount();break;
            case 2:ssc.searchcourse();break;
            case 3:ssc.sortcourse();break;
            case 4:ssc.editcourse();break;
            case 5:ssc.addstudent();    ssc.dispCount();break;
            case 6:ssc.searchstudent();break;
            case 7:ssc.sortstudent();break;
            case 8:ssc.editstudent();break;
            case 9:ssc.studentselectacourse();break;
            case 10:ssc.studentdropacourse();break;
            case 11:ssc.searchstudentselectcourse();break;
            case 0:ssc.write2file();exit(0);
            }
        }
    return 0;
}