Question

Write a C++ console program that defines a class named Course that utilizes a dynamically allocated array. Do not use the vector class for this assignment.

The Course class should define private data members for the name of the course, the number of students in the course, an array of student names (string*), and the capacity of the course (the array may not be full of students). Use pointer notation when dealing with the array.

A 2-arg constructor should initialize the course name and also allocate the array given the capacity.

Course(string &courseName, int capacity)

Note that the capacity is the size of the array, but the array may not be full of students.

Define a destructor that will de-allocate the array when a course object is destroyed.

Include accessor methods for the course name and number of students.

Include a mutator method named addStudent that will add a student to the course. A student is represented by a string for the student name. The student name should be added to the array at the appropriate position in the array. If the array's capacity is exceeded then the array's capacity should be increased by 5.

When the array's capacity is increased (inside the addStudent method), print out a short message to the screen:

"Class size has been expanded to " << newCapacity << endl;

A void method should be included that will print out the students in the course.

Test the class from main by creating a course object with an initial capacity of 3. Next add 5 students to the course. Finally display the course name, number of students, and list of students names.

** Note: Do not use square bracket notation [ ] in this program, except for when using the new operator. Use only pointer notation to manipulate the array.

Answer 1

Hello, I have answered this question before. Here is the completed code for this problem. Comments are included, go through it, learn how things work and let me know if you have any doubts or if you need anything to change. If you are satisfied with the solution, please rate the answer. Thanks

#include<iostream>

using namespace std;

class Course{

              private:

              //private attributes

              string name;

              int numStudents;

              string* students;

              int capacity;

             

              public:

              //constructor taking course name and capacity

              Course(string &courseName, int _capacity){

                            name=courseName;

                           capacity=_capacity;

                           //initializing dynamic array

                           students=new string[capacity];

                           numStudents=0;

              }

             

              //destructor

              ~Course(){

                           //deallocating dynamic array. square brackets needs to be used here

                           delete[] students;

              }

             

              //returns the course name

              string getCourseName(){

                           return name;

              }

             

              //returns the number of students

              int getNumberOfStudents(){

                           return numStudents;

              }

             

              //method to add a student to the students array

              void addStudent(string stud_name){

                           //checking if array is full

                           if(numStudents==capacity){

                                         //updating capacity

                                         capacity=capacity+5;

                                         //creating a new dynamic array of new capacity

                                         string* newArray=new string[capacity];

                                         //copying all values from students to new array

                                         for(int i=0;i<numStudents;i++){

                                                       *(newArray+i)=*(students+i);

                                         }

                                         //deleting old array, replacing with new one

                                         delete[] students;

                                         students=newArray;

                                         //displaying a message

                                         cout<<"Class size has been expanded to " << capacity << endl;

                           }

                           //adding new student at the end of the array

                           *(students+numStudents)=stud_name;

                           numStudents++;

              }

             

              //method to print all students

              void printStudents(){

                           cout<<"Following students are opted for this course."<<endl;

                           //looping and printing all students

                           for(int i=0;i<numStudents;i++){

                                         cout<<*(students+i)<<endl;

                           }

              }

                          

};

int main(){

              //creating a course and adding 5 students

              string courseName="CS123";

              Course course(courseName,3);

              course.addStudent("Oliver Queen");

              course.addStudent("Felicity Smoak");

              course.addStudent("John Diggle");

              course.addStudent("Curtis");

              course.addStudent("Dinah");

              //displaying details

              cout<<"Course Name: "<<course.getCourseName()<<endl;

              cout<<"Number of students: "<<course.getNumberOfStudents()<<endl;

              course.printStudents();

              return 0;

}

/*OUTPUT*/

Class size has been expanded to 8

Course Name: CS123

Number of students: 5

Following students are opted for this course.

Oliver Queen

Felicity Smoak

John Diggle

Curtis

Dinah