hoe to combine three vectors together

hello,

i want to ask a question, how i can create a quiz system that can generate a questions for me. for example quiz software to test knowledge of countries and their currencies

what is the currency of UK?
what is the currency of US?

The questions should be generated dynamically and the name of the country must come from a map which initialized. The student answers by typing the name of the currency and pressing ENTER key and the software shows another question with the name of a different country - this should continue until the software the iterated over all the countries in the map

Each time the student enters an answer you check the map to see if his/her answer is correct. The software should make a record of which questions were answered correctly and which questions were answered incorrectly.

Use a Vector to store answers which were answered incorrectly so that they can displayed in the report

i have started with this part of code:

Code:

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#include<map>
#include<iostream>
using namespace std;


int main(){


map<string, string> currency;
currency["china"]="yen";
currency["US"]="dolar";


map<string, string>:: iterator it;


for(it=currency.begin(); it!=currency.end(); it++){


cout<<"what is the currency of"<<(*it).first<<"?"<<"\n";
cout<<"\n";
cin>>(*it).second;
cout<<"\n";
}
cin.get();


}

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could you help me please, i stop in this point and i get confuse.

thanks,

Quote:

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Originally Posted by loyal

Code:

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cin>>(*it).second;

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this is clearly not what you want to do. it will overwrite the existing value. what you want to do is create a string variable in which to store the user's input, and then compare that to it->second.

i try this. i create a class that contains three vectors

the first vector to store the questions.

Code:

---

#include <iostream>
#include <vector>


using namespace std;
class Quiz{
           
      private:
        int countR;
        int countW;
        int result;
        string Ans;
       
        vector <string> Country;
        vector <string> Question;
        vector <string> Answers;
        vector <string> userAnsw;
        vector <string> ResultQuestions;
       
    public:
          Quiz();
          void inputanswer();
          void checkanswer();
};


 Quiz::Quiz(){
      Country.push_back("US");
      Country.push_back("UAE");
      Country.push_back("China");
      Answers.push_back("dollar");
      Answers.push_back("Derham");
      Answers.push_back("Yen");
}           




void Quiz::inputanswer(){
    for(int i=0; i<3; i++){
cout<< "what is the currency of "<<Country.at(i)<<" ?" << "\n";
cin>>Ans;
userAnsw.push_back(Ans);
}
cout<<"********************"<<endl;
cout<<" "<<"\n";
cout<<" "<<"\n";
cout<<" "<<"\n";
for(int i=3; i<userAnsw.size(); i++){
cout<<userAnsw.at(i)<< "\n";


}
   
}     


main(){
  Quiz q;
  q.inputanswer();
  cin.get();
   
      }

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now, i want to create the second and third vector that check for the answers, if the answer is correct or not and display the result as below:

=== Result of Currency Quiz ===
Total Questions : 10
Correct answers : 5
Wrong answers: 5
You scored 50% on this quiz.

The Questions which you answered incorrectly were
Q2. What is the currency of Singapore?
Q5. What is the currency of UK?
Q7. What is the currency of Malaysia?
Q8. What is the currency of Pakistan?
Q9. What is the currency of Australia?

Well next you should define your checkanswer() function.

The beginning of the code looks nice and neat and then the end of the code "forgets" indentation and then main doesn't even have a type. Whats going on?

main.cpp: In member function ‘void Quiz::inputanswer()’:
main.cpp:49:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
main.cpp: At global scope:
main.cpp:58:6: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type]

i make some changes on the code and try to solve it using Qt Create. But there is just three errors i try to solve it. Could you help me please

Code:

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#include<QtCore/QCoreApplication>
#include<QVector>
#include<QMap>
#include<QString>
#include<QDebug>

classQuiz{

private:
inti,countR,countW;

QMap<QString,QString>my_map;
QVector<QString>my_vec;

public:
Quiz();
voidstart();
};

Quiz::Quiz(){
}

voidQuiz::start(){
my_map["UK"]="Dollarl";
my_map["UAE"]="Derham";
my_map["China"]="Yen";

QVector<QString>::iteratormy_it;
QMap<QString,QString>::iteratorit;

i=1;
countR=0;
countW=0;

QStringans;

for(it=my_map.begin();it!=my_map.end();it++){
qDebug()<<"Q"<<i<<"whatisthefullformfor"+(*it).first<<"?\n";
cin>>ans;

if((*it).second==ans){
countR++;
}
else{
countW++;
}
i++;
}

qDebug()<<"ResultofITacronymsQuize"<<endl;
qDebug()<<"TotalQuestion:10"<<endl;

qDebug()<<"Correctanswers:"<<countR<<""<<endl;
qDebug()<<"Wronganswers:"<<countW<<""<<endl;

qDebug()<<"Youscored"<<countR*10<<"%onthisquize"<<endl;
system("pause");

}

intmain(intargc,char*argv[]){
QCoreApplicationa(argc,argv);
QuizQ;
Q.start();

}

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you really need to pick one way to do this and stick with it.