Pushing a class object onto another class' parameter

I've been given an assignment and it says exactly that. I'm not sure what other way I could so it other than "classTemp.push(temp);" as you can see in BOLD at the bottom of this post. I left the other parts out that weren't very relevant.

Make the following changes in the input function:
-Change the input function to have a parameter that is a reference to a StringOfCars.
-Just after creating the car, push it on to the StringOfCars parameter.

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class Car
{
private:
	string reportingMark;
	int carNumber;
	string kind;
	bool loaded;
	string destination;
public:
	Car() { setUp("", 0, "other", false, "NONE"); }
	Car(Car &obj)
	{
		setUp(obj.reportingMark, obj.carNumber, obj.kind, obj.loaded, obj.destination);
	}
	Car(string reportingMarkTemp, int carNumberTemp, string kindTemp, bool loadedTemp, string destinationTemp)
	{
		setUp(reportingMarkTemp, carNumberTemp, kindTemp, loadedTemp, destinationTemp);
	}
	~Car()
	{}
	void setUp(string reportingMarkTemp, int carNumberTemp, string kindTemp, bool loadedTemp, string destinationTemp);
	void output();
	friend bool operator==(const Car &left, const Car &right);
	Car & Car::operator=(const Car & carB)
	{
		setUp(carB.reportingMark, carB.carNumber, carB.kind, carB.loaded, carB.destination);
		return *this;
	}
};

class StringOfCars
{
private:
	Car* CarPtr = new Car[];
	static const int ARRAY_MAX_SIZE = 10;
	int size;
	int top;
public:
	StringOfCars()
	{
		CarPtr = new Car[];
		size = 0; 
	}
	StringOfCars(const StringOfCars &obj)
	{
		if (obj.size > 0)
			CarPtr = new Car[size];
		else
			CarPtr = NULL;

		size = obj.size;

		for (int i = 0; i < size; i++)
			CarPtr[i] = obj.CarPtr[i];

		top = obj.top;
	}
	~StringOfCars()
	{ 
		delete [] CarPtr;
	}
	void push(Car temp)
	{
		top++;
		CarPtr[top] = temp;
	}
	void pop(Car &temp)
	{
		temp = CarPtr[top];
		top--;
	}
	void output()
	{
		if (top == -1)
			cout << "NO cars" << endl;
		else
		{
			for (int i = 0; i < top; i++)
			{
				cout << "Car " << i << endl;
				&Car::output;
			}
		}
	}
};
void input(StringOfCars & classTemp)
{
	string type;
	string reportingMark;
	int carNumber;
	string kind;
	bool loaded;
	string destination;
	string choice;
	ifstream inputFile;

	inputFile.open("Lab D.txt");

	if (inputFile.fail())
	{
		cout << "File does not exist." << endl;
		system("pause"); //does not compile on Code::Blocks
		exit(100); //does not compile on Code::Blocks
	}

	while (inputFile.peek() != EOF)
	{
		inputFile >> type;
		inputFile >> reportingMark;
		inputFile >> carNumber;
		inputFile >> kind;
		inputFile >> choice;
		if (choice == "true")
		{
			loaded = true;
			while (inputFile.peek() == ' ')
			{
				getline(inputFile, destination);
			}
		}
		if (choice == "false")
		{
			loaded = false;
			while (inputFile.peek() == ' ')
			{
				getline(inputFile, destination);
			}
		}

		Car temp(reportingMark, carNumber, kind, loaded, destination);
		classTemp.push(temp); // WHERE THE COMPILE ERROR OCCURS
	}

	return;
}
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