Question

Create a question bank. The language is visual studio c++.

Description:
Question bank computerizes the MCQ based exams.It takes input from a file having questions and their answers
and presents randomly before the exam takers.

Required skill set: OOP, STL(Vector), Arrays and file handling

Answer 1

#include <iostream>

#include <sstream>

#include <fstream>

#include <cstdlib>

#include <vector>

using namespace std;

class MCQ

{

private:

string question, opt1, opt2, opt3, opt4;

char correct;

public:

MCQ()

{

this->question = "";

this->opt1 = "";

this->opt2 = "";

this->opt3 = "";

this->opt4 = "";

this->correct = 0;

}

MCQ(string ques, string opt1, string opt2, string opt3, string opt4, char corr)

{

this->question = ques;

this->opt1 = opt1;

this->opt2 = opt2;

this->opt3 = opt3;

this->opt4 = opt4;

this->correct = corr;

}

string getQuestion(){ return this->question; }

string getOption1(){ return this->opt1; }

string getOption2(){ return this->opt2; }

string getOption3(){ return this->opt3; }

string getOption4(){ return this->opt4; }

char getCorrect(){ return this->correct; }

string toString()

{

stringstream ss;

ss << "Question: " << question << " ?" << endl << "a. " << opt1 << "\nb. " << opt2 << "\nc. " << opt3 << "\nd. " << opt4;

return ss.str();

}

};

void splitIntoTokens(string const &str, const char delimiter, vector<string> &res);

int main()

{

ifstream inFile("questions.txt");

vector<MCQ> mcqs;

int correctAnswers = 0;

if(!inFile.is_open())

{

cout << "Could not open file: questions.txt" << endl;

exit(0);

}

string line;

while(getline(inFile, line))

{

const char delimiter = ',';

vector<string> result;

splitIntoTokens(line, delimiter, result);

string question = result[0];

string option1 = result[1];

string option2 = result[2];

string option3 = result[3];

string option4 = result[4];

char correct = result[5][0];

mcqs.push_back(MCQ(question, option1, option2, option3, option4, correct));

}

inFile.close();

cout << endl;

int nQuestions = mcqs.size();

char yesNo;

do

{

int picker = rand() % nQuestions + 0;

cout << mcqs[picker].toString() << endl;

char correct = mcqs[picker].getCorrect();

char choice;

cout << "Your answer (a/b/c/d): ";

cin >> choice;

while(choice != 'a' && choice != 'b' && choice != 'c' && choice != 'd')

{

cout << choice << " is not a valid choice" << endl;

cout << "Your answer (a/b/c/d): ";

cin >> choice;

}

if(choice == correct)

correctAnswers++;

cout << endl << "Continue?[y/n]: ";

cin >> yesNo;

if(yesNo == 'N' || yesNo == 'n')

{

cout << "\nYour score: " << correctAnswers << endl << "Thank you...Good Bye!\n";

exit(0);

}

cout << endl;

}while(yesNo != 'N' || yesNo != 'n');

}

void splitIntoTokens(string const &str, const char delimiter, vector<string> &res)

{

stringstream ss(str);

string s;

while(getline(ss, s, delimiter))

{

res.push_back(s);

}

}

**************************************************************** SCREENSHOT ***********************************************************

INPUT FILE (questions.txt):