write main for this code in which create manue where user will be able to  add new course enroll student search student drop course display data of course all the function are written in code just call them in main and pass value from user #include   using namespace std; class student { private:     int id;     string name; public:     student();     student(int, string);     int getID();     void setID(int);     string getName();     void setName(string); // student class implementation student() {     id = 0;     name = ""; } student(int id, string name) {     this->id = id;     this->name = name; } int getID() {     return id; } void setID(int id) {     this->id = id; } string getName() {     return name; } void setName(string name) {     this->name = name; } }; class Course { private:     int courseID;     string courseName;     int capacity;     int currentlyEnrolled;     student *students; public:     Course();     Course(int, string, int, int);     // getters     int getcourseID();     string getcourseName();     int getcapacity();     int getcurrentlyEnrolled();     // Setters     void setcourseID(int);     void setcourseName(string);     void setcapacity(int);     void setcurrentlyEnrolled(int);     //methods are here     void enroll(int, string);     void drop(int);     void resize();     void shift(int);     int search(int);     bool isfull();     void printdata();       //implementation of class course     Course()     {         courseID = 0;         courseName = "   ";         capacity = 3;         currentlyEnrolled = 0;         students = new student[capacity];     }     Course(int id, string name, int capacity, int enroll) {         this->courseID = id;         this->courseName = name;         this->capacity = capacity;         currentlyEnrolled = 0;         students = new student[capacity];     }     bool isfull()     {         if (capacity == currentlyEnrolled)         {             return true;         }         else         {             return false;         }     }     //how to resize the course or how to increase capacity     void resize()     {         capacity = capacity + 5;         student*newstudents = new student[capacity];         //coppying data         for (int i = 0; i < currentlyEnrolled; i++)         {             newstudents[i].setID(students[i].getID());             newstudents[i].setName(students[i].getName());         }         delete[] students;         students = newstudents;     }     int search(int studentID)     {         cout << "\n\nEnter student id to Search the list: " << endl;         cin >> studentID;         for (int i = 0; i < currentlyEnrolled; i++)         {             if (students[i].getID() == studentID)             {                 return i;             }         }         return -1;     }     void Course::enroll(int id, string name)     {         if (isfull()) {             resize();             students[currentlyEnrolled].setID(id);             students[currentlyEnrolled].setName(name);             currentlyEnrolled = currentlyEnrolled + 1;         }         else {             students[currentlyEnrolled].setID(id);             students[currentlyEnrolled].setName(name);             currentlyEnrolled = currentlyEnrolled + 1;         }     }     // here is for droping course     void drop(int studentID) {         int index = search(studentID);         if (index == -1) {             cout << "not found" << endl;             return;         }         else {             students[index].setID(0);             students[index].setName("");             shift(index);             currentlyEnrolled = currentlyEnrolled - 1;             cout << "Student Course Dropped Successfully!!!!" << endl;         }     }     void shift(int index) {         for (int i = index; i < currentlyEnrolled; i++) {             students[i].setName(students[i + 1].getName());             students[i].setID(students[i + 1].getID());         }     }     void printdata() {         cout << "courseID is =" << courseID << endl;         cout << "course Name is =" << courseName << endl;         for (int i = 0; i < currentlyEnrolled; i++) {             cout << "ID is " << students[i].getID();         }     } }; int main() { }