Hey can someone help me with a lab ?

Recode the roster example such that it lists the classes each student is enrolled in. Here is an example printout:

All Students last name, first name: courses enrolled Kathleen Andreson: CS1 CS3 CS4 Gerald Edwards: CS1 CS2 CS3 Mary Price: CS1 ...

#include  #include  #include  #include  #include  #include  using std::ifstream; using std::string; using std::getline; using std::list; using std::vector; using std::cout; using std::endl; using std::move; class Student{ public: Student(string firstName, string lastName): firstName_(firstName), lastName_(lastName) {} // move constructor, not really needed, generated automatically Student(Student && org): firstName_(move(org.firstName_)), lastName_(move(org.lastName_)) {} // force generation of default copy constructor Student(const Student & org) = default; string print() const {return firstName_ + ' ' + lastName_;} // needed for unique() and for remove() friend bool operator== (Student left, Student right){ return left.lastName_ == right.lastName_ && left.firstName_ == right.firstName_; } // needed for sort() friend bool operator< (Student left, Student right){ return left.lastName_ < right.lastName_ || (left.lastName_ == right.lastName_ && left.firstName_ < left.lastName_); } private: string firstName_; string lastName_; }; Program reads in 3 files, assuming each file is a class that student is attending. The program will search through the 3 files and find and output the number of classes students take. Note: File only contain student names, the filename is the class name i.e Math 101. // reading a list from a fileName void readRoster(list& roster, string fileName); // printing a list out void printRoster(const list& roster); int main(int argc, char* argv[]){ if (argc <= 1){ cout << "usage: " << argv[0] << " list of courses, dropouts last" << endl; exit(1);} // vector of courses of students vector > courseStudents; for(int i=1; i < argc-1; ++i){ list roster; readRoster(roster, argv[i]); cout << " " << argv[i] << " "; printRoster(roster); courseStudents.push_back(move(roster)); } // reading in dropouts list dropouts; readRoster(dropouts, argv[argc-1]); cout << " dropouts "; printRoster(dropouts); list allStudents; // master list of students for(auto& lst : courseStudents) allStudents.splice(allStudents.end(),lst); cout << " all students unsorted "; printRoster(allStudents); allStudents.sort(); // sorting master list cout << " all students sorted "; printRoster(allStudents); allStudents.unique(); // eliminating duplicates cout << " all students, duplicates removed "; printRoster(allStudents); for (const auto& str : dropouts) // removing individual dropouts allStudents.remove(str); cout << " all students, dropouts removed "; printRoster(allStudents); } void readRoster(list& roster, string fileName){ ifstream course(fileName); string first, last; while(course >> first >> last) roster.push_back(Student(first, last)); course.close(); } // printing a list out void printRoster(const list& roster){ for(const auto& student : roster) cout << student.print() << endl; }