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package week5;
import java.util.Random;
/**
* Class for multiple choice questions
*
* Note: for 2-choice questions the TCQuestion class should be used.
*
* @author Camil Staps, s4498062
*/
public class MCQuestion extends Question {
protected final String[] answers;
protected final int correctAnswer;
/**
* Construct a new instance
*
* @param question the question
* @param answers array of the answer
* @param correctAnswer index for answers pointing to the correct answer
* @param weight weight of the question
*/
public MCQuestion (String question, String[] answers, int correctAnswer, int weight) {
this.question = question;
this.answers = answers;
this.correctAnswer = correctAnswer;
setWeight(weight);
}
/** See the javadoc on the constructor above */
public MCQuestion (String question, String[] answers, int correctAnswer) {
this.question = question;
this.answers = answers;
this.correctAnswer = correctAnswer;
}
@Override
public boolean isCorrect(String answer) {
return correctAnswer == (answer.charAt(0) - 'A');
}
@Override
public String juisteAntwoord() {
return answers[correctAnswer];
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder(super.toString());
sb.append("\n");
int i = 0;
for (String a : answers) {
sb.append((char) ('A' + i++)).append(": ").append(a).append("\n");
}
sb.deleteCharAt(sb.length() - 1);
return sb.toString();
}
/**
* For this type of questions, duplicating randomizes the order of the answers.
*
* @return A new instance of the MCQuestion class with the same parameters, just another order of the answers.
*/
@Override
public Question duplicate() {
Random r = new Random();
int shift = r.nextInt(answers.length - 1) + 1;
String[] new_answers = new String[answers.length];
for (String a : answers) {
new_answers[shift++ % answers.length] = a;
}
int new_correctAnswer = (correctAnswer + shift) % answers.length;
return new MCQuestion(question, new_answers, new_correctAnswer, weight);
}
}
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