Question

I have to learn memory management in class and how to dynamically allocate memory with the new operator.

I have a struct that is

struct Course
{
    int courseNumber, creditHours;
    string courseName;
    char grade;
};

I am trying to fill the member variables with a for loop but I am unsure how to use a getline with courseName. I was able to use a regular cin but it won’t work if the class name has spaces.

Below is my code and what I’ve tried but I get a arguement error that courseArray is undefined.

Course* readCourseArray(int &courses)                           //Read Courses
{
    cout<<"\nHow many courses is the student taking?\n";
    cin>>courses;
    const int *sizePTR = &courses;
    Course *coursePTR = new Course[*sizePTR]; 

    for(int count = 0; count < *sizePTR; count++)  //Enter course information
    {
        cout<<"\nEnter student "<<count+1<<"'s course name\n";
        getline(cin,courseArray[count].courseName);
        cout<<"\nEnter student "<<count+1<<"'s course number\n";
        cin>>coursePTR[count].courseNumber;
        cout<<"\nEnter student "<<count+1<<"'s credit hours\n";
        cin>>coursePTR[count].creditHours;
        cout<<"\nEnter student "<<count+1<<"'s grade\n";
        cin>>coursePTR[count].grade;
    }


    return coursePTR;
}

Answer 1

The pointer to your array is called coursePTR, not courseArray. Just replace the name courseArray with coursePTR.

For this line:

const int *sizePTR = &courses;

You don’t have to do that, you can just use courses directly (so, remove all the * from the places you use sizePTR then change sizePTR to courses).

Also I hope you are remembering to delete[] the return value of readCourseArray :)