I am working on an assignment where we have to create a "student" object with a "course" member array that is dynamic so the user can enter from one course to as many as they'd like in the array. I've been trying this every which way and just cannot get the array to resize and accept new elements. Here is my code as it stands now:
cout << "Enter student name > ";
cin >> name;
Student firstStudent(name);
cout << endl << "Enter \"done\" when you are complete";
cout << endl << "Enter a new course : ";
cin >> course;
while (course != "done") {
numCourses++;
firstStudent.addElement(numCourses, course);//makes the array bigger
cout << endl << "Enter a new course : ";
cin >> course;
}//end while
member variables and constructor:
class Student
{
private:
string name;//name of student
string *dynArray = new string[1];//array
public:
Student::Student(string name)
{
this->name = name;
this->numC = 1;//initialized to one to start with
}
resizing and adding an element to the array:
void Student::addElement(int numCourses, string &course) {//DYNAMIC ARRAY
if (numCourses > this->numC) {//checks if there are more courses than there is room in the array
this->numC = numCourses; //this changes the member variable amount
dynArray[numCourses] = course;//adds new course to array
string *temp = new string[numC];//create bigger temp array
temp = dynArray;//write original to temp
delete[]dynArray; //this tells it that it's an array
dynArray = temp;//make dynarray point to temp
}
else {
dynArray[numCourses] = course;//adds new course to array
}
}//end addElement
Even if I manage to get rid of compile errors, it will often come up with runtime errors. I'm sure it has to do with pointers/copying arrays but I'm just learning and haven't yet mastered these concepts.
Edit: dynArray[numCourses] = course; creates a char array. ie if course = "one", dynArray[0] = "o", dynArray[ 1] = "n", etc. Does anyone know how to keep this from happening?
temp = dynArray. You have to write a loop that copies each element of the array.numC?std::vectoris not available (to make you learn how it works under the hood) then the correct thing to do is implement your own vector-type class, and use that, rather than mixing the logic of how to handle a resizable array alongside other unrelated pieces of code.