[Aus10]

So here is the backstory in order to understand this issue!

I am using one function to read in questions and answer choices from a .txt file.
However, instead of just using the read in function to cout the text in the file...
I want to use a different function to cout a random question from the file.
How would I go about doing this?

My goal here is to randomly read in a question and its set of answer choices, one at a time, while including the A. B. C. D. in front of each answer choice. ( ABCD is not in the .txt file ).

Here is my code thus far
...

PHP Code


<?php 
#include <iostream>
#include <fstream>
#include <iomanip>
#include <string>
#include <ctime>
#include <cstdlib>

using namespace std;
// Function Prototypes
double read_questions();
double read_answers();
void show_question();

int main()
{
    read_questions();
    read_answers();
    show_question();
    return 0;
}

double read_questions()
{
       string question;
       string choice1;
       string choice2;
       string choice3;
       string choice4;
       string space;
       fstream fin;
       string input_arr[50][50];
       fin.open("questions.txt");

       for (int q = 0; q < 7; q++)
       {
           getline(fin, question);
           getline(fin, choice1);
           getline(fin, choice2);
           getline(fin, choice3);
           getline(fin, choice4);
           getline(fin, space);

           input_arr[q][0] = question;
           input_arr[q][1] =  "A. " + choice1;
           input_arr[q][2] =  "B. " + choice2;
           input_arr[q][3] =  "C. " + choice3;
           input_arr[q][4] =  "D. " + choice4;
           input_arr[q][5] = space;

            //cout << input_arr[q][0] << endl;
            //cout << input_arr[q][1] << endl;
            //cout << input_arr[q][2] << endl;
            //cout << input_arr[q][3] << endl;
            //cout << input_arr[q][4] << endl;
            //cout << input_arr[q][5] << endl;
     // I have these couts commented out b/c while this works perfectly,
    // this function is only supposed to read in the file, not output it.
    // My main issue is here, if I could somehow figure out how to
    // get this output, but in the show_question() function, while
    // still being completely random as to which question it chooses to output.
       }

}
//reads in the answers from file, storing to a 1D array of characters
double read_answers()
{
    fstream fin;
    char answer_arr[50];
    char answer;
    fin.open("answers.txt");

    for (int y = 0; y < 7; y++)
    {
        fin >> answer;
        answer_arr[y] = answer;
    }
}
//Displays a question and its responses, labeled A-D, optionally hiding a //specified response for the second try at a question.
//Its primary parameter is an array of strings that is one single //question/response set.
void show_question()
{

int random_number;

        // seeds rand (needed for getting random numbers)
        srand(time(NULL));

        // randomly generates a number 0 - 7 inclusively
        random_number = rand() % 7 + 0;

        cout << "You roll a " << random_number << ": ";




} 


Thanks!

[Annabelle Lee]

I am using one function to read in questions and answer choices from a .txt file.
However, instead of just using the read in function to cout the text in the file...
I want to use a different function to cout a random question from the file.
How would I go about doing this?

Thanks!

This is why you pass arguments to functions. Take in the file, pick a random number/line that you want to keep it. Pass it as an argument to a function to output it using cout. That's about it.

[Aus10]

I sort of understand, and tried it. However when you say take in the file, where should I do this? It seems I'm trying to pass a function as an argument into another function. A function into a function, I've been researching and can't seem to find examples. :/

[Annabelle Lee]

Basically you'll make two functions. Pseudocode follows. No need to pass a function to a function.

Reading Function
Get/open file
Read it in, stop at random line.
Save that line to a string/etc as you need.
Call Output_function(string you got of that line)
Close file
End function

Output_function
Take the string it got from argument
cout << string << endl;
// other stuff you have to output, options, etc.

[Aus10]

That clears alot up. Thank you very much for your help!