need help to get program to load/read txt file

[cjharris85]

Below is the code I have and i am in need of help getting program to load a text file so the user can take exam and then display results. I think once if figure out how to do this the program will/should work? i would appreciate and suggestions on how to this? Thanks in advance.

#include <iostream>
#include <string>
#include <fstream>
#include <cstdlib>
#include <vector>

using namespace std;

class Question
{
private:
	string question, answer;
	int value;
	string questiontype;
public:
	Question() {};
	Question(string theQuestion, int pointValue)
	{
		question = theQuestion;
		value = pointValue;
	}

	string getQuestion()
	{
		return question;
	}
	virtual void setQuestion(string answer, int value)
	{
	}
	virtual void setNewQuestion(string answer, int value)
	{
	}
	int getValue()
	{
		return value;
	}
	virtual string printOptions() { return ""; };
	virtual string getAnswer() { return ""; };

};


class QuestionTF : public Question
{
private:
	string answer;
public:
	QuestionTF(string theQuestion, int pointValue, string theAnswer) : Question(theQuestion, pointValue)
	{
		answer = theAnswer;
	}
	string printOptions()
	{
		return "True / False";
	}
	string getAnswer()
	{
		return answer;
	}
};


class QuestionMC : public Question
{
private:
	string answer;
	string options[6];
public:
	QuestionMC(string theQuestion, int pointValue, string theAnswer) : Question(theQuestion, pointValue)
	{
		answer = theAnswer;
		for (int i = 0; i < 6; i++)
		{
			options[i] = "";
		}
	}
	void addOption(string anOption, int i)
	{

		options[i] = anOption;
	}
	string printOptions()
	{
		string str = "";
		for (int i = 0; i < 6; i++)
		{
			str = str + (char)(65 + i) + "." + options[i] + "\n";
		}
		return str;
	}
	string getAnswer()
	{
		return answer;
	}
};

class Student
{
private:
	int pointsAvailable;
	int pointsScored;
public:
	Student()
	{
		pointsAvailable = 0;
		pointsScored = 0;
	}
	void SetPointsScored(int point)
	{
		pointsScored = point;
	}
	int GetPointsScored()
	{
		return pointsScored;
	}
	void SetPointsAvailable(int point)
	{
		pointsAvailable = point;
	}
	int GetPointsAvailable()
	{
		return pointsAvailable;
	}
};

class Examination
{
private:
	vector<Question*> questions;
public:
	void LoadQuestions(ifstream& fin)
	{
		questions.clear();
		int numberofquestions;
		string questiontype;
		string questiontext;
		string correctanswer;

		int pointvalue;

		fin >> numberofquestions;

		string extra;
		char ex;
		for (int i = 0; i < numberofquestions; i++)
		{
			fin >> questiontype;
			if (questiontype == "TF")
			{
				fin >> pointvalue;
				fin >> extra;
				getline(fin, questiontext);
				extra.append(questiontext);
				fin >> correctanswer;
				QuestionTF* questiontf = new QuestionTF(extra, pointvalue, correctanswer);
				questions.push_back(questiontf);

			}
			else if (questiontype == "MC")
			{

				fin >> pointvalue;
				fin.ignore();
				getline(fin, questiontext);
				int numberofoptions;
				fin >> numberofoptions;
				//cout<<"the no of options"<<numberofoptions<<endl;
				string* answers;
				answers = new string[numberofoptions];
				fin.ignore();
				for (int i = 0; i < numberofoptions; i++)
				{
					getline(fin, answers[i]);
					//cout<<answers[i]<<endl;
				}
				fin >> correctanswer;

				QuestionMC* questionmc = new QuestionMC(questiontext, pointvalue, correctanswer);
				for (int i = 0; i < numberofoptions; i++)
				{
					//cout<<answers[i]<<endl;
					questionmc->addOption(answers[i], i);
				}
				questions.push_back(questionmc);

			}
		}
	}
	int GetNumberOfQuestions()
	{
		return questions.size();
	}
	string getCorrectAnswer(int index)
	{
		return questions[index]->getAnswer();
	}
	void DisplayIthQuestion(int index)
	{
		cout << "Question #" << (index + 1) << ": ";
		cout << questions[index]->getQuestion() << endl;
		cout << questions[index]->printOptions() << endl;

	}
	int getPointsValue(int i)
	{
		return questions[i]->getValue();
	}
	void DisplayQuestions()
	{
		for (int i = 0; i < questions.size(); i++)
		{
			cout << "Question #" << (i + 1) << ": ";
			cout << questions[i]->getQuestion() << endl;
			cout << questions[i]->printOptions() << endl;
			cout << "Correct Answer: " << questions[i]->getAnswer() << endl << endl;
		}
	}
};


string ConvertToupper(string str)
{
	for (int i = 0; i < str.length(); i++)
	{
		str[i] = toupper(str[i]);
	}
	return str;
};

char DisplayMenu()
{
	char option;
	while (true)
	{
		cout << "\n""Exam Menu:""\n";
		cout << endl;
		cout << "  1. Load Exam" << endl;
		cout << "  2. Take Exam" << endl;
		cout << "  3. Display Results" << endl;
		cout << "  4. Quit" "\n" << endl;
		cout << "Make a Selection: ";
		cin >> option;
		option = toupper(option);
		if (option == '1' || option == '2' || option == '3' || option == '4')
			return option;
		else
			cout << "Enter a valid option." << endl;
	}
};


char DisplayMenu();
string ConvertToupper(string str);

int main()
{

	int numquestions, choice;
	string examName = "Exam.txt ";
	Examination exam;
	char option;
	int totalpoints = 0;
	int totalAvailablePoints = 0;
	option = DisplayMenu();
	Student student;

	while (option != '4')
	{
		switch (option)
		{
		case '1':
		{
			string filename;
			cout << "\n""Enter filename: ";
			cin >> filename;
			ifstream fin;
			fin.open(filename.c_str());
			while (!fin)
			{
				cout << "\n""Error! Input file does not exists. Try again.""\n" << endl;
				cout << "Enter filename: ";
				cin >> filename;
				fin.open(filename.c_str());
			}
			exam.LoadQuestions(fin);

			fin.close();
		}
		break;
		case  '2':
		{
			string answer;

			for (int i = 0; i < exam.GetNumberOfQuestions(); i++)
			{
				cout << endl;
				exam.DisplayIthQuestion(i);
				cout << "\n""Enter correct answer: ";
				cin >> answer;
				answer = ConvertToupper(answer);
				string correct = ConvertToupper(exam.getCorrectAnswer(i));
				if (answer == correct)
				{
					student.SetPointsScored(student.GetPointsScored() + exam.getPointsValue(i));

					cout << "Correct""\n" << endl;
				}
				else
				{
					cout << "Incorrect""\n" << endl;
					cout << "The correct answer is: " << correct << endl;
				}

				student.SetPointsAvailable(student.GetPointsAvailable() + exam.getPointsValue(i));
			}

		}
		break;
		case  '3':
		{
			cout << "\n""Total points available: " << student.GetPointsAvailable() << endl;
			cout << "Total points scored: " << student.GetPointsScored() << endl;
			cout << "Percentage of points: " << ((double)student.GetPointsScored() / (double)student.GetPointsAvailable()) * 100.0 << endl;
		}
		break;
		}
		option = DisplayMenu();
	}
	getchar();
	return 0;
}

[lastchance]

Well, strictly speaking, that's the code you got from Chegg.com

[thmm]

@lastchance,
how did you find out?

[lastchance]

Google one of the more esoteric phrases in it. I think I tried one of the weird QuestionMC ones.

It's the sort of code where ... if you'd written the code you wouldn't need to ask the question.

[thmm]

@lastchance,
I see. I found it here also http://www.cplusplus.com/forum/general/185771/