help please !

Question

hello I am a beginner in java and I want to solve a problem, I want to do a questionnaire question / answer but my program just shows the last entered value! solution or another suggestion thanks

import java.util.Scanner;

public class projet2 {
static Scanner sc= new Scanner(System.in);
public static void main(String[] args)
{

int x=1,n=3, res=0,ress=0,y=2;
String Q;

String []tab2=new String[x];
String []tab3=new String[y];
String []tab4=new String[1];

question2(tab2,tab3,tab4,n);
System.out.println();

afficher(tab2);
afficher(tab3);

}
//-----------------question----------------
public static void question2(String []tab,String[]tab2, String[]tab3,int n){
String Q; int res=0;
while(res<n){
for(int i=0;i<tab.length;i++) {
System.out.println(" question");
Q=sc.nextLine();
tab[i]=Q;
for(int j=0;j<tab2.length;j++){
System.out.println("Answer");
tab2[j]=sc.nextLine();
}
BR(tab3);
}
res++;
}
}
//-----------------quest----------------
public static void question(String []tab){
String Q;
for(int i=0;i<tab.length;i++){
System.out.println("Entrez une question");
Q=sc.nextLine();
tab[i]=Q;
}
}
//-----------------afficher----------------
public static void afficher(String []tab){
for(int i=0;i<tab.length;i++){
System.out.println(tab[i]);
}
}
//-----------------la bonne reponse----------------
public static void BR(String[]tab){
String Q;
for(int i=0;i<tab.length;i++){
System.out.println("true answer : ");
Q=sc.nextLine();
tab[i]=Q;
}
}
}

Answer 1

Note my input comment
https://code.sololearn.com/c8p0McifIrMm/?ref=app

Answer 2

You definitely broke it in many places. The only change that appears to worth the cost is putting the numbers on the prompts. Your changes to answers generates an exception anytime you have more than 2 questions. You no longer keep track of your good answers despite asking the user for them two times for each question.

Answer 3

hello, happy new year and thank you for your answer. I want to make a questionaire of several questions / answers and I chose 3 questions and 2 answers just to test my program my goal is to enter questions / answers and reads after tab [] it is to ask the question tab3 [] for the answers and tab4 [] it is to give the good answer among the answers seized

Answer 4

thank you, I am a beginner in java and I have not yet arrived at the class and objects.

Answer 5

What error and how did you change it?

Answer 6

From the looks of things, I'd guess you are overwriting your previous questions. You loop 3 times in question2 each time tossing the input from the previous loop to save this loops input.

Answer 7

How many total questions do you want? How many answers do they each have?
Based on your code, I'm guessing 3 questions with 2 answers each. If so, tab2 should have 3 elements and tab3 should have 6. tab4 appears to have another answer per question. Is it meant to be different or same as tab3 values? If same, instead enter number 0/1 indicating which one is right. If different, put in tab3 with 9 elements. To get to answers for question 0 to 2 loop for i = 0 and 1 multiply question number by 2 and add i. So tab2[2] is last question and tab3[4 and 5] are the answers.

Answer 8

Names matter. If you stay with arrays, name them so everyone knows what it contains. String questions = new String[maxQuestions] helps everyone reading your code.

Answer 9

You might wish to consider having multiple answer arrays or matrix.
answers[maxQuestions][maxAnswerPerQuestion] gives one slot per question for the answers with multiple answers allowed.

A empty string "" could allow 2 answers for one question and 6 for another.

Answer 10

yes I understand I'm trying to change my code and do what you tell me

Answer 11

import java.util.Scanner;

public class projet2 {
public static Scanner sc= new Scanner(System.in);
public static void main(String[] args)
{

int maxQuestion=1,maxAnswerPerQuestion=2, n=3;// n is number of question/answers

String[] question=new String[maxQuestion];
String[]answers=new String[maxAnswerPerQuestion];
String[]goodAnswer=new String[1];

question2(question,answers,goodAnswer,n);

System.out.println();

afficher(question);
afficher(answers);

}
//---------question----------------
public static void question2(String []tab,String[]tab2, String[]tab3,int n){
String Q; int res=0;
while(res<n){
for(int i=0;i<tab.length;i++) {
System.out.println(" question");
Q=sc.nextLine();
tab[i]=Q;
for(int j=0;j<tab2.length;j++){
System.out.println("Answer");
tab2[j]=sc.nextLine();
}
BR(tab3);
}
res++;
}
}
//---------quest----------------
public static void question(String []tab){
String Q;
for(int i=0;i<tab.length;i++){
System.out.println("Entrez une question");
Q=sc.nextLine();
tab[i]=Q;
}
}
//--------display----------------
public static void afficher(String []tab){
for(int i=0;i<tab.length;i++){
System.out.println(tab[i]);
}
}
//-------good answer-----------
public static void BR(String[]tab){
String Q;
for(int i=0;i<tab.length;i++){
System.out.println("good answer : ");
Q=sc.nextLine();
tab[i]=Q;
}
}
}
;

Answer 12

https://code.sololearn.com/cvUh4AzyrNsr/#java

Answer 13

thank you for your help, the code works very well and I made some changes.
but when I wanted to increase the number of questions, for example 15 or 20 questions he showed me an error !!

https://code.sololearn.com/cvUh4AzyrNsr/#java

Answer 14

My code followed your example of doing the output. You attempted to do it that way originally. I've updated it.

Answer 15

I suggest posting a link to your code. On app, there is a + insert that allows you to do so. Using web or app, you can paste web site link into post text entry. We can help easier if we don't have to create a copy of your code.

Next, give the inputs you are using and the outputs you get so we can duplicate your run.

Finally, list the outputs you expected so we know how you wanted the code to work.

This post has lots of suggestions for getting help.
https://www.sololearn.com/Discuss/333866/?ref=app

Answer 16

Happy New Year. You're welcome. What do you know of Java so far? Classes would make this easiest.

Answer 17

Do you understand my matrix answers array?

Answer 18

Third array int rightAnswer[maxQuestion] picks correct array index of answer.

Answer 19

please link code

Answer 20

I made changes on the display method
but the code you gave me shows all the questions you entered first and after the answers
on my code when I do 2 questions and 2 answers works fine but when I increase the number of questions it shows me an error and it shows me the following message

Exception in the "main" thread java.lang.ArrayIndexOutOfBoundsException: 4
to projectQCM.DemiProjectTest.main (DemiProjectTest.java:17)