trying to load from file

[Jreyn]

So, for my homework assignment I am to:

Write a C++ program that is menu-driven that allows for the following menu choices:

1.Load an exam: Loading an exam should prompt the user for an exam file. If no file exists, it should allow the user to specify a different file. Upon a successful load of an exam, the user should be presented with the menu again.

2.Display exam: The program should simply display each question, its point value, and the answer to the screen. (The functionality of actually taking the exam will be created in Week 5). Upon displaying the exam to the screen, the user should be presented with the menu again.

3.Quit: Quit the program gracefully by displaying a "thank you" message to the user, and ensure that all files have been closed along with any other housekeeping that should be done as your program shuts down.

Whenever I run the program I get to the menu but once I input 1 to load the file I get a runtime error and the program tells me that there was an unknown question type. I am guessing that it is getting stuck in the loadExam function in class Exam

**I am not expecting anyone to do this for me but if someone could help point me in the right direction I would be grateful!!!

#include "stdafx.h"
#include <iostream>
#include <string>
#include <fstream>
#include <sstream>
#include <iomanip>
#include <vector>
#include <algorithm>

using namespace std;

class Question
{
protected:
	string question;
	int value;

public:
	Question()
	{}

	Question(string theQuestion, int points)
	{
		question = theQuestion;
		value = points;
	}

	string getQuestion()
	{
		cout << question << endl;
		return question;
	}

	int getValue()
	{
		return value;
	}

	virtual void printOptions() = 0;
	virtual string getAnswer() = 0;

};

class QuestionTF : public Question
{
private:
	string answer;

public:
	QuestionTF(string theQuestion, int points, string theAnswer)
		:Question(theQuestion, points)
	{
		answer = theAnswer;
	}

	void printOptions()
	{
		cout << "(true/false)" << endl;
	}

	string getAnswer()
	{
		cout << "The Answer is: " << answer << endl;
		return answer;
	}

};

class QuestionMC : public Question
{
private:
	string answer;
	vector <string> options;

public:
	QuestionMC(string theQuestion, int points, string theAnswer)
		:Question(theQuestion, points)
	{
		answer = theAnswer;
	}

	void addOption(string anOption)
	{
		options.push_back(anOption);
	}

	void printOptions()
	{
		for (int i = 0; i < options.size(); ++i)
		{
			cout << options[i] << endl;
		}
	}

	string getAnswer()
	{
		cout << "The answer is: " << answer << endl;
		return answer;
	}

};

class Exam
{
protected:
	vector <Question*> questions;
	int question;

public:
	Exam() {}

	bool loadExam(std::string filename)
	{
		Question* question;
		vector <string> answerChoices;
		ifstream filein;
		int numQuestions, pointValue;
		string questionType, strQuestion, strAnswer, choice, num;

		filein.open(filename);

		if (!filein.is_open())
		{
			return false;
		}

		else
		{
			getline(filein, num);
			numQuestions = stoi(num);


			for (int i = 0; i < numQuestions; i++)
			{
				getline(filein, questionType, ' ');				
				getline(filein, num);
				pointValue = stoi(num);
				getline(filein, strQuestion);


				if (questionType == "TF")
				{
					QuestionTF*question = new QuestionTF(strQuestion, pointValue, strAnswer);
					questions.push_back(question);
				}

				else if (questionType == "MC")
				{
					QuestionMC *question = new QuestionMC(strQuestion, pointValue, strAnswer);
					questions.push_back(question);
				}

				else
				{
					cout << "Error, unknown question type!\n";
				}
			}

			filein.close();
			cout << "Exam loaded successfully!\n";

		}
		return true;
	}

	void displayExam()
	{
		for (int i = 0; i < questions.size(); ++i)
		{
			cout << "Question " << i + 1 << ":";
			cout << questions[i]->getQuestion() << endl;
			cout << "Point Value: " << questions[i]->getValue() << endl;
			cout << "Answer: " << questions[i]->getAnswer() << endl; 
		}
	}


};



int main()
{
	Exam theExam;
	string filename;
	char menuSelection;

	do
	{
			cout << "Welcome to the Testing Center" << endl << endl;
			cout << "  --------Menu--------" << endl << endl;
			cout << "What would you like to do?" << endl;
			cout << "1 - Load an exam" << endl;
			cout << "2 - Display and exam" << endl;
			cout << "Q - Quit" << endl;

			cin >> menuSelection;

			switch (menuSelection)
			{
			case '1':
				cout << "You selected Load an exam\n";
				cout << "What is the name of the exam file?\n";
				cin >> filename;

				theExam.loadExam(filename);

				if (theExam.loadExam(filename) == true)
					cout << "Exam questions have been loaded succesfully!" << endl;

				if (theExam.loadExam(filename) == false)
				{
					cout << "Load exam failed. Please check testbank file!" << endl;
				}

				break;

			case '2':
				cout << "You selected display exam\n";
				theExam.displayExam();
				break;

			case 'q':
			case 'Q':
				cout << "Thank you and good-bye\n";
				break;

			default:
				cout << "Please try again\n";

			}
		

	} 
	
	while (tolower(menuSelection) != 'q');

	system("pause");

    return 0;
}

The text file is named testbank and is as follows:

3
TF 5
There exist birds that cannot fly?
True
MC 10
Who was the President of the USA in 1991?
6
Richard Nixon
Gerald Ford
Jimmy Carter
Ronald Reagan
George Bush Sr.
Bill Clinton
E
TF 10
The city of Boston hosted the 2004 Summer Olympics?
False

[tpb]

You're not reading in all the information for the questions.
For the TF type of question you need to read the True or False line.
For the MC type of question you need to read the number of options, all the options, and the correct answer.

Also note that you are calling loadExam three times in case '1'. It should be more like this:

			case '1':
				cout << "You selected Load an exam\n";
				cout << "What is the name of the exam file?\n";
				cin >> filename;

				if (theExam.loadExam(filename))
					cout << "Exam questions have been loaded succesfully.\n";
				else
					cout << "Load exam failed. Please check testbank file.\n";

				break;

[Jreyn]

tpb,

Thanks for the quick reply and getting me pointed in the right direction! I am going to start looking into what you posted and see if I can't get it sorted out. Ill post with the results in the next day or so.

Thanks Again!!!!!