#include <iostream>

#include <string>

#include <fstream>

#include <cstdlib>

using namespace std;

 

class Question

{

public:

 string getQuestion()// Get the question

 {

  return question;

 }

 virtual int getValue() // Get point value of question

 {

  return value;

 }

 virtual string getQuestionType()// gets the type of question

 {

  return questiontype;

 }

 virtual void setQuestion(string answer, int value)

 {

 }

 virtual void setNewQuestion(string answer, int value)

 {

 }

 virtual void printOptions()

 {

 }

 virtual string getAnswer()

 {

  return answer;

 }

private:

 string question, answer;

 int value;

 string questiontype;

};

 

// True/False Questions

class QuestionTF : public Question

{

public:

 void setQuestion(string theQuestion, int pointValue)

 {

  string theAnswer;

  questiontype = "TF";

  question = theQuestion;

  value = pointValue;

  options = "true/false";

  getline(cin, theAnswer);

  answer = theAnswer;

 }

 void setNewQuestion(string theQuestion, int pointValue)

 {

  string theAnswer;

  questiontype = "TF";

  question = theQuestion;

  value = pointValue;

  options = "true/false";

  cout << "Enter answer true/falsen";

  getline(cin, theAnswer);

  answer = theAnswer;

 }

 int getValue() // Value for test question

 {

  return value;

 }

 string getQuestionType()// Type of question

 {

  return questiontype;

 }

 void printOptions()

 {

  cout << question << endl;

  cout << answer << endl;

 }

 string getAnswer()

 {

  return answer;

 }

private:

 string question, questiontype;

 string answer;

 string options;

 int value;

};

// Multiple Choice Questions

class QuestionMC : public Question

{

public:

 void setQuestion(string theQuestion, int pointValue)

 {

  string line;

  questiontype = "MC";

  getline(cin, line);

  numberOfOptions = atoi(line.c_str());

  question = theQuestion;

  value = pointValue;

  for (int count = 0; count<numberOfOptions; count++) {

   getline(cin, line);

   options[count] = line;

  }

  getline(cin, line);

  answer = line;

 }

 void setNewQuestion(string theQuestion, int pointValue)

 {

  string line;

  questiontype = "MC";

  cout << "Enter the number of choices: ";

  getline(cin, line);

  numberOfOptions = atoi(line.c_str());

  question = theQuestion;

  value = pointValue;

  for (int count = 0; count<numberOfOptions; count++) {

   cout << "nEnter next option: ";

   getline(cin, line);

   options[count] = line;

  }

  cout << "nEnter Answer: ";

  getline(cin, line);

  answer = line;

 }

 void printOptions()

 {

  char first = 'A';

  cout << question << endl;

  for (int count = 0; count<numberOfOptions; count++) {

   cout << first++ << ". " << options[count] << "n";

  }

  cout << answer << "n";

 }

 int getValue() // Get the point value of the question

 {

  return value;

 }

 string getQuestionType()// Get the type of question

 {

  return questiontype;

 }

 string getAnswer()

 {

  return answer;

 }

private:

 int numberOfOptions;

 string question, answer;

 string options[6];

 string questiontype;

 int value;

};

 

// Function prototypes for the functions supporting the main program functionality

int loadArray(Question *myQuestions[]);

int addQuestion(Question *myQuestions[], int numquestions);

void printQuizQuestions(Question *myQuestions[], int numquestions);

void writeExamQuestionFile(Question *myQuestions[], int numquestions);

 

int main() {

 Question *myQuestions[10];

 int numquestions;

 

 // Opening the testbank file and processing as a question of each type

 try {

  ifstream infile("testbank2.txt");

  streambuf *cinbuf = cin.rdbuf(); 

  cin.rdbuf(infile.rdbuf());      

  string line, theQuestion, theAnswer;

  numquestions = loadArray(myQuestions);

  cin.rdbuf(cinbuf);

 }

 catch (exception& e) {

  cout << "Exception occured";

  cout << "Something went wrong with reading the infile like: " << e.what() << ". Check the contents of testbank2.txt";

 }

 numquestions = addQuestion(myQuestions, numquestions);

 printQuizQuestions(myQuestions, numquestions);

 cout << "Write to textbank File";

 try {

  ofstream outfile("textbank.txt");

  streambuf *coutbuf = std::cout.rdbuf();

  cout.rdbuf(outfile.rdbuf());           

  writeExamQuestionFile(myQuestions, numquestions);

  cout.rdbuf(coutbuf);

  cout << "Text Bank File Written.n" << "n";

 

 }

 catch (exception& e) {

  cout << "Exception occurred";

 }

 getchar();

 return 0;

}

 

// Function to load the array of Questions from the input file

int loadArray(Question *myQuestions[])

{

 string line;

 string questiontype, theQuestion;

 int numquestions, questionvalue;

 // Get the number of questions from the first line in the file

 getline(cin, line);

 numquestions = atoi(line.c_str());

 for (int count = 0; count<numquestions; count++) {

  getline(cin, line);

 

  int npos = line.size();

  int prev_pos = 0;

  int pos = 0;

  while (line[pos] != ' ')

   pos++;

  questiontype = line.substr(prev_pos, pos - prev_pos);

  prev_pos = ++pos;

  questionvalue = atoi(line.substr(prev_pos, npos - prev_pos).c_str());

 

  if (questiontype == "TF")

   {

    myQuestions[count] = new QuestionTF;

    cout << " nEnter the Question: ";

    getline(cin, theQuestion);

    myQuestions[count]->setNewQuestion(theQuestion, questionvalue);

   }

  if (questiontype == "MC")

   {

    myQuestions[count] = new QuestionMC;

    cout << " nEnter the Question: ";

    getline(cin, theQuestion);

    myQuestions[count]->setNewQuestion(theQuestion, questionvalue);

   }

 

 }

 return numquestions;

}

 

// Function to add questions by getting from user and using the interactive methods added to the classes.

int addQuestion(Question *myQuestions[], int numquestions)

{

 int questionvalue;

 int count = numquestions;

 string theQuestion, line, questiontype;

 cout << "Enter the question type and valuen";

 cout << "The question types are MC and TFn";

 getline(cin, line);

 

 // Get the next line with the question type and the value of the question

 int npos = line.size();

 int prev_pos = 0;

 int pos = 0;

 while (line[pos] != ' ')

  pos++;

 questiontype = line.substr(prev_pos, pos - prev_pos);

 prev_pos = ++pos;

 questionvalue = atoi(line.substr(prev_pos, npos - prev_pos).c_str()); // Last word

 if (questiontype == "TF")

 {

   myQuestions[count] = new QuestionTF;

   cout << " nEnter the Question: ";

   getline(cin, theQuestion);

   myQuestions[count]->setNewQuestion(theQuestion, questionvalue);

  }

 if (questiontype == "MC")

  {

   myQuestions[count] = new QuestionMC;

   cout << " nEnter the Question: ";

   getline(cin, theQuestion);

   myQuestions[count]->setNewQuestion(theQuestion, questionvalue);

  } 

 

 return ++numquestions;

}

void printQuizQuestions(Question *myQuestions[], int numquestions)

{

 for (int count = 0; count<numquestions; count++)

 {

  myQuestions[count]->printOptions();

  cout << "n";

 }

}

 

// Function to write to the file in the format needed to read later when loading if needed.

void writeExamQuestionFile(Question *myQuestions[], int numquestions)

{

 int count;

 string qtype;

 cout << numquestions << "n";

 for (count = 0; count<numquestions; count++) {

  qtype = myQuestions[count]->getQuestionType();

  cout << qtype << " " << myQuestions[count]->getValue() << "n";

  myQuestions[count]->printOptions();

 }

}  

HI! I am getting an error when I type the answer in my C++ Program. Need help figuring out what the problem is.