Recode the roster example we studied in class such that it prints the list of classes each student is enrolled in. Here is an example printout:

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

The project should be done using associative containers and class Student to hold the name of the student. Specifically, you need to use a map keyed by the class Student while value could be a list of classes the student is enrolled in. The map should be the ordered map. That is, the data structure to be used in as follows: map>

Here is the source file. rosterObject.cpp

 #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_ < right.firstName_); } private: string firstName_; string lastName_; }; // 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; }