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- cant get it to read the text files and d
cant get it to read the text files and display the txt help
#include <string>
#include <iostream>
#include <vector>
#include <fstream>
using namespace std;
class Question
{
private:
string question;
int value;
public:
Question() {};
Question(string theQuestion, int pointValue)
{
question = theQuestion;
value = pointValue;
}
string getQuestion()
{
return question;
}
int getValue()
{
return value;
}
virtual string printOptions() {
return "";
};
virtual string getAnswer() {
return "";
};
};
class QuestionMC: public Question
{
private:
string answer;
string options[3];
public:
QuestionMC(string theQuestion, int pointValue, string theAnswer): Question(theQuestion, pointValue)
{
answer = theAnswer;
for (int i = 0; i < 3; i++)
{
options[i] = "";
}
}
void addOption(string anOption)
{
for (int i = 0; i < 3; i++)
{
if (options[i] == "")
{
options[i] = anOption;
break;
}
}
}
string printOptions()
{
string str = "";
for (int i = 0; i < 3; i++)
{
if (options[i] != "")
{
str = str + (char)(65 + i) + ". " + options[i] + "\n";
} else
{
break;
}
}
return str;
}
string getAnswer()
{
return answer;
}
};
class QuestionTF: public Question
{
private:
string answer;
public:
QuestionTF(string theQuestion, int pointValue, string theAnswer): Question(theQuestion, pointValue)
{
answer = theAnswer;
}
string printOptions()
{
return "True or False";
}
string getAnswer()
{
return answer;
}
};
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;)
{
fin >> questiontype;
if (questiontype == "TF")
{
fin >> pointvalue;
fin >> extra;
getline(fin, questiontext);
fin >> correctanswer;
QuestionTF * questiontf = new QuestionTF(questiontext, pointvalue, correctanswer);
#include <vector>
getline(fin,correctanswer);
} else if (questiontype == "MC")
{
fin >> pointvalue;
fin.ignore();
getline(fin, questiontext);
int numberofoptions;
fin >> numberofoptions;
string * answers;
answers = new string[numberofoptions];
fin.ignore();
for (int i = 0; i<numberofoptions; i++)
{
getline(fin, answers[i]);
}
fin >> correctanswer;
QuestionMC * questionmc = new QuestionMC(questiontext, pointvalue, correctanswer);
for (int i = 0; i<numberofoptions; i++)
{
questionmc -> addOption(answers[i]);
}
}
}
}
int GetNumberOfQuestions()
{
return questions.size();
}
string getCorrectAnswer(int index)
{
return questions[index].getAnswer();
}
void DisplayIthQuestion(int index)
{
cout << "Question Number" << (index + 1) << ": ";
cout << questions[index].getQuestion() << endl;
cout << questions[index].printOptions() << endl;
}
int getPointsValue(int i) {
return questions[i].getValue();
}
void DisplayQuestions(int index)
{
for (int i = 0; i < questions.size(); i++)
{
cout << "Question S" << (index + 1) << ": ";
cout << questions[i].getQuestion() << endl;
cout << questions[i].printOptions() << endl;
cout << "Correct Answer: " << questions[i].getAnswer() << endl << endl;
}
}
};
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;
}
};
char DisplayMenu();
string ConvertToupper(string str);
int main()
{
Examination exam;
char option;
int totalpoints = 0;
int totalAvailablePoints = 0;
option = DisplayMenu();
Student student;
while (option != 'Q')
{
switch (option)
{
case 'L':
{
string filename;
cout << "Enter the filename: ";
cin >> filename;
ifstream fin;
fin.open(filename.c_str());
while (!fin)
{
cout << "Error: Input file does not exists. Try again." << endl;
cout << "Enter the filename: ";
cin >> filename;
fin.open(filename.c_str());
}
exam.LoadQuestions(fin);
fin.close();
}
break;
case 'T':
{
string answer;
for (int i = 0; i;)
{
cout << endl;
exam.DisplayIthQuestion(i);
cout << "Enter correct answer: ";
cin >> answer;
answer = ConvertToupper(answer);
string correct = ConvertToupper(exam.getCorrectAnswer(i));
cout << "The correct answer is: " << correct << endl;
if (answer == correct)
{
student.SetPointsScored(student.GetPointsScored() + exam.getPointsValue(i));
cout << "Good job here!" << endl;
} else
{
cout << "Better luck next time...." << endl;
}
student.SetPointsAvailable(student.GetPointsAvailable() + exam.getPointsValue(i));
}
}
break;
case 'S':
{
cout << "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();
}
return 0;
}
string ConvertToupper(string str)
{
for (int i = 0; i;)
{
str[i] = toupper(str[i]);
}
return str;
}
char DisplayMenu()
{
char option;
while (true)
{
cout << endl << "\tL - Load an Exam" << endl;
cout << "\tT -Take an exam Exam" << endl;
cout << "\tS - Show exam results" << endl;
cout << "\tQ - Quit" << endl;
cout << "Enter an option: ";
cin >> option;
option = toupper(option);
if (option == 'L' || option == 'T' || option == 'S' || option == 'Q')
return option;
else
cout << "ERROR: Input a valid option." << endl;
}
}
#include <iostream>
#include <vector>
#include <fstream>
using namespace std;
class Question
{
private:
string question;
int value;
public:
Question() {};
Question(string theQuestion, int pointValue)
{
question = theQuestion;
value = pointValue;
}
string getQuestion()
{
return question;
}
int getValue()
{
return value;
}
virtual string printOptions() {
return "";
};
virtual string getAnswer() {
return "";
};
};
class QuestionMC: public Question
{
private:
string answer;
string options[3];
public:
QuestionMC(string theQuestion, int pointValue, string theAnswer): Question(theQuestion, pointValue)
{
answer = theAnswer;
for (int i = 0; i < 3; i++)
{
options[i] = "";
}
}
void addOption(string anOption)
{
for (int i = 0; i < 3; i++)
{
if (options[i] == "")
{
options[i] = anOption;
break;
}
}
}
string printOptions()
{
string str = "";
for (int i = 0; i < 3; i++)
{
if (options[i] != "")
{
str = str + (char)(65 + i) + ". " + options[i] + "\n";
} else
{
break;
}
}
return str;
}
string getAnswer()
{
return answer;
}
};
class QuestionTF: public Question
{
private:
string answer;
public:
QuestionTF(string theQuestion, int pointValue, string theAnswer): Question(theQuestion, pointValue)
{
answer = theAnswer;
}
string printOptions()
{
return "True or False";
}
string getAnswer()
{
return answer;
}
};
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;)
{
fin >> questiontype;
if (questiontype == "TF")
{
fin >> pointvalue;
fin >> extra;
getline(fin, questiontext);
fin >> correctanswer;
QuestionTF * questiontf = new QuestionTF(questiontext, pointvalue, correctanswer);
#include <vector>
getline(fin,correctanswer);
} else if (questiontype == "MC")
{
fin >> pointvalue;
fin.ignore();
getline(fin, questiontext);
int numberofoptions;
fin >> numberofoptions;
string * answers;
answers = new string[numberofoptions];
fin.ignore();
for (int i = 0; i<numberofoptions; i++)
{
getline(fin, answers[i]);
}
fin >> correctanswer;
QuestionMC * questionmc = new QuestionMC(questiontext, pointvalue, correctanswer);
for (int i = 0; i<numberofoptions; i++)
{
questionmc -> addOption(answers[i]);
}
}
}
}
int GetNumberOfQuestions()
{
return questions.size();
}
string getCorrectAnswer(int index)
{
return questions[index].getAnswer();
}
void DisplayIthQuestion(int index)
{
cout << "Question Number" << (index + 1) << ": ";
cout << questions[index].getQuestion() << endl;
cout << questions[index].printOptions() << endl;
}
int getPointsValue(int i) {
return questions[i].getValue();
}
void DisplayQuestions(int index)
{
for (int i = 0; i < questions.size(); i++)
{
cout << "Question S" << (index + 1) << ": ";
cout << questions[i].getQuestion() << endl;
cout << questions[i].printOptions() << endl;
cout << "Correct Answer: " << questions[i].getAnswer() << endl << endl;
}
}
};
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;
}
};
char DisplayMenu();
string ConvertToupper(string str);
int main()
{
Examination exam;
char option;
int totalpoints = 0;
int totalAvailablePoints = 0;
option = DisplayMenu();
Student student;
while (option != 'Q')
{
switch (option)
{
case 'L':
{
string filename;
cout << "Enter the filename: ";
cin >> filename;
ifstream fin;
fin.open(filename.c_str());
while (!fin)
{
cout << "Error: Input file does not exists. Try again." << endl;
cout << "Enter the filename: ";
cin >> filename;
fin.open(filename.c_str());
}
exam.LoadQuestions(fin);
fin.close();
}
break;
case 'T':
{
string answer;
for (int i = 0; i;)
{
cout << endl;
exam.DisplayIthQuestion(i);
cout << "Enter correct answer: ";
cin >> answer;
answer = ConvertToupper(answer);
string correct = ConvertToupper(exam.getCorrectAnswer(i));
cout << "The correct answer is: " << correct << endl;
if (answer == correct)
{
student.SetPointsScored(student.GetPointsScored() + exam.getPointsValue(i));
cout << "Good job here!" << endl;
} else
{
cout << "Better luck next time...." << endl;
}
student.SetPointsAvailable(student.GetPointsAvailable() + exam.getPointsValue(i));
}
}
break;
case 'S':
{
cout << "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();
}
return 0;
}
string ConvertToupper(string str)
{
for (int i = 0; i;)
{
str[i] = toupper(str[i]);
}
return str;
}
char DisplayMenu()
{
char option;
while (true)
{
cout << endl << "\tL - Load an Exam" << endl;
cout << "\tT -Take an exam Exam" << endl;
cout << "\tS - Show exam results" << endl;
cout << "\tQ - Quit" << endl;
cout << "Enter an option: ";
cin >> option;
option = toupper(option);
if (option == 'L' || option == 'T' || option == 'S' || option == 'Q')
return option;
else
cout << "ERROR: Input a valid option." << endl;
}
}
Hello dev1243,
This is going to take a little time to load up and check out.
Andy
PLEASE ALWAYS USE CODE TAGS (the <> formatting button), to the right of this box, when posting code. Along with the proper indenting it makes it easier to read your code and also easier to respond to your post. http://www.cplusplus.com/articles/jEywvCM9/ http://www.cplusplus.com/articles/z13hAqkS/ Hint: You can edit your post, highlight your code and press the <> formatting button. This will not automatically indent your code. That part is up to you. You can use the preview button at the bottom to see how it looks. I found the second link to be the most help. |
This is going to take a little time to load up and check out.
Andy
| cant get it to read the text files and display the txt help |
Here is your code indented:
|
|
Lines 48-51: These aren't necessary since string has a default constructor. But really, why use a fixed-length array for the options? Why not make options a vector<string> and then add_option() can just call
options.push_back()Line 67: Replace
65 with 'A' to make it clearer.Line 80: You could derive QuestionTF from QuestionMC and set two options to "True" and "False"
Line 103. Questions should be a vector<Question*>. That way it can store any type of question. Don't forget to create a destructor for Examination that will delete the questions. For this to work, you'll need to make
virtual Question::~Question().Lines 125 & 141: You create questions and then don't do anything with them. You want to store these in the questions vector, which will be possible once you make it a vector<Question*>
Lines 160,161: I'd create Question::display(ostream &) method and replace these lines with a call to
questions[index].display();Liens 170-172: Replace with
DisplayIthQuestion(i);
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