The Course Class

The code has been modified slightly and now uploaded to the site.

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11.13.cpp

#include <iostream>
#include <string>

class Course{
    public:
        Course(const std::string& courseName, int capacity);
        ~Course();
        Course(const Course&);
        std::string getCourseName() const;
        void addStudent(const std::string& name);
        void dropStudent(const std::string& name);
        std::string* getStudents() const;
        int getNumberOfStudents() const;
        void clear();

    private:
        std::string courseName;
        std::string* students;
        int numberOfStudents;
        int capacity;
};

Course::Course(const std::string& courseName, int capacity){
    this -> courseName = courseName;
    this -> capacity = capacity;
    students = new std::string[1];
    numberOfStudents = 0;
}

Course::~Course(){
    delete[] students;
}

Course::Course(const Course& v){
    this -> numberOfStudents = v.numberOfStudents;
    this -> students = new std::string[this -> numberOfStudents];
    for (int i = 0; i < this -> numberOfStudents; i++){
        this -> students[i] = v.students[i];
    }
}

std::string Course::getCourseName() const{
    return this -> courseName;
}

void Course::addStudent(const std::string& name){
    std::string* arr = nullptr;
    if (numberOfStudents == 0){
        students[0] = name;
        numberOfStudents += 1;
        delete[] arr;
        return;
    }
    else {
        numberOfStudents += 1;
        // std::cout << "Capacity" << numberOfStudents << std::endl;
        arr = new std::string[numberOfStudents];
        for (int i = 0; i < numberOfStudents - 1; i++){
            arr[i] = students[i];
        }
        arr[numberOfStudents - 1] = name;
        delete[] students;
        students = arr;
    }
}

void Course::dropStudent(const std::string& name){
    std::string* arr = new std::string[numberOfStudents - 1];
    // for (int i = 0; i < capacity; i++){
    //     arr[i] = students[i];
    // }
    int count = 0;
    for (int i = 0; i < numberOfStudents; i++){
        if (students[i] == name){
            students[i] = "";
        }
    }
    for (int i = 0; i < numberOfStudents; i++){
        if (students[i] == ""){
            continue;
        }
        arr[count] = students[i];
        count++;
    }
    delete[] students;
    students = arr;
    numberOfStudents -= 1;
}

std::string* Course::getStudents() const{
    return students;
}

int Course::getNumberOfStudents() const{
    return numberOfStudents;
}

void Course::clear(){
    std::string* empty = {};
    delete[] students;
    students = empty;
}

int main(){
    Course course1("Data structures", 10);
    Course course2("Database Systems", 15);

    std::cout << course1.getCourseName() << std::endl;;

    course1.addStudent("Peter Jones");
    course1.addStudent("Brian Smith");
    course1.addStudent("Anne Kennedy");

    course1.dropStudent("Peter Jones");

    course2.addStudent("Peter Jones");
    course2.addStudent("Steve Smith");

    std::cout << "Number of students in course1: " <<
        course1.getNumberOfStudents() << "\n";
    std::string* students = course1.getStudents();
    for (int i = 0; i < course1.getNumberOfStudents(); i++){
        std::cout << students[i] << ", ";
    }

    std::cout << "\nNumber of students in course2: " << course2.getNumberOfStudents() << "\n";
    students = course2.getStudents();
    for (int i = 0; i < course2.getNumberOfStudents(); i++){
        std::cout << students[i]  << ", ";
    }
    return 0;
}

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