Thread: Vector Outputs Alien Language

Program:
I have 2 arrays: 1 for the correct answers to a quiz, 1 for the user. I then have a vector to hold the incorrect answers.


It keeps outputting what looks like alt characters, and I have no idea why.


Here is the code:

Code:

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


int main()
{
    const char a1[]={'a','d','b','b','c','b','a','b','c','d','a','c','d','b','d','c','c','a','d','b'};
    char a2[20];
    int i=0;
    int incorrect=0;
    vector<char> incorrectQuestions;


    cout<<"Drivers License Exam:\n";
    for(i=0;i<20;i++)
    {
        cout<<"Please enter the answer to question #"<<i+1<<"\n";
        cin>>a2[i];
        while(a2[i]!='a'&&a2[i]!='b'&&a2[i]!='c'&&a2[i]!='d'
            )
        {
            cout<<"Error: Please enter either a, b, c, or d:\n";
            cin>> a2[i];
        }
        if(a1[i]!=a2[i])
        {
            incorrect++;
            incorrectQuestions.push_back(i);
        }
    }


    if(incorrect>5)
    {
        cout<<"Sorry.. You failed the test.\n";
        cout<<"The number of correct answers are: "<<(20-incorrect)<<"\n";
        cout<<"The number of incorrect answers are: "<<incorrect<<"\n";
        cout<<"The incorrect questions are:\n";
        int numValues=incorrectQuestions.size();
        for(i=0;i<numValues;i++)
        {
            cout<<incorrectQuestions[i]<<"\n";
        }
    }
    else
    {
        cout<<"You passed the test!.\n";
        cout<<"The number of correct answers are: "<<(20-incorrect)<<"\n";
        cout<<"The number of incorrect answers are: "<<incorrect<<"\n";
        cout<<"The incorrect questions are:\n";
        int numValues=incorrectQuestions.size();
        for(i=0;i<numValues;i++)
        {
            cout<<incorrectQuestions[i]<<"\n";
        }
    }
    system("Pause");
    return 0;
}

Originally Posted by Aslaville

It just print what YOU saved in the vector:

Code:

if(a1[i]!=a2[i])       {
           incorrect++;
           incorrectQuestions.push_back(i);
       }
   }

I thought you wanted to have

Code:

 if(a1[i]!=a2[i])       {
           incorrect++;
           incorrectQuestions.push_back(a2[i]);
       }
   }

Yeah it is supposed to keep the question number(s) of the incorrect, not the contents. I figured it out though. I declared the vector as a char while i is an int.