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Thread: Loops and arrays

  1. #1
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    Default Loops and arrays

    I have a problem with loops and arrays. I need to gather an int response between 1 and 5 and store it in to the however it will accept all ints plus after it reaches question 10 it just repeats.

     
    import java.util.*;
     
    public class Survey {
     
        Scanner in = new Scanner(System.in);
        private String surveyTitle;
        public static int currentID = 0; // holds the current respondent Id
        private static int respondentID = 0;
        private int responses[] = new int[10];
        private String questions[] = new String[10];
        public final static int MAX_RESPONSES = 10;
        public final static int MAX_QUESTIONS = 10;
        public final static int PRINT_ALL = -1;
     
        Survey() {
     
        }
     
        Survey(int questionNumber, int respondentId){
     
        }
     
        public int getCurrentID() {
            generateRespondentId();
            return currentID;
        } // end getCurrentID
     
        public void setCurrentID(int respondentID) {
            Survey.currentID = respondentID;
        }
     
        public void setSurveyTitle(String surveyTitle) {
            this.surveyTitle = surveyTitle;
        }
     
        public String getSurveyTitle() {
            return surveyTitle;
        }
     
        public final void enterQuestions() {
            for (int i = 0; i < questions.length; i++) {
                System.out.println("Please enter a question! ");
                questions[i] = in.nextLine();
            }
        }
     
        public final void displaySurveyResults(int min, int max) {
            // Random random = new Random();
            int[] frequency = new int[11];
            int[] responses = new int[10];
     
            System.out.println(surveyTitle + "\n\n");
     
            for (int i = 0; i < 10; i++) {
                //int randomNum = random.nextInt((max - min) + 1) + min;
                //responses[i] = randomNum;
            }
            for (int answer = 0; answer < responses.length; answer++) {
                try {
                    ++frequency[responses[answer]];
                } // emd try
                catch (ArrayIndexOutOfBoundsException e) {
                    System.out.println(e);
                    System.out.printf("   responses[%d] = %d\n\n", answer, responses[answer]);
                } //end catch
            } // end for
            System.out.printf("%s%15d\n\n", "Respondent's ID", getCurrentID());
            System.out.printf("%10s%10s\n", "Question", "Frequency");
     
            for (int qNumber = 1; qNumber < frequency.length; qNumber++) {
                System.out.printf("%6d%10d\n", qNumber, frequency[qNumber]);
            }
        }
     
        public int generateRespondentId() {
            String surveyTitleInput;
            int ID;
            ID = 0;
            int total = 0;
            ++ID;
     
            System.out.print("Please enter the survey title: ");
            surveyTitleInput = in.next();
     
            ID = ID++;
            currentID = ID;
     
            return currentID;
     
        } // end generateRespondentId() method
     
        // Print bar chart for each question
        public void displayQuestionStats() {
     
            System.out.println("Response Distibution:");
            int[] frequency = new int[11];
     
            for (int count = 0; count < frequency.length; count++) {
                if (count == 10) {
                    System.out.printf("%5d: ", 100);
                } else {
                    System.out.printf("%02d-%02d: ", count * 10, count * 10 + 9);
                }
                for (int stars = 0; stars < frequency[count]; stars++) {
                    System.out.print("*");
                }
                System.out.println();
            }
        }
     
        public void logResponse() {
            for(int i = 0; i < MAX_QUESTIONS; i++){
            presentQuestion(i);
            }
        }
     
        public int topRatedQuestion() {
            int topRated = responses[0];
            for (int response : responses) {
                if (response > topRated) {
                    topRated = response;
                }
            }
            return topRated;
        }
     
        public int lowRatedQuestion() {
            int lowRated = responses[0];
            for (int response : responses) {
                if (response < lowRated) {
                    lowRated = response;
                }
            }
            return lowRated;
        }
    This where I am having issues
         public void presentQuestion(int questionNumber) {
            int response = 0;
            for (int count = 0; count < MAX_QUESTIONS; count++) {
                System.out.println("Question number: " + (count + 1));
                System.out.println(questions[count]);
                response = in.nextInt();
                if(response >= 5 && response >= 1){
     
                responses[count] = response;
                } else if(response > 5 && response < 0){
                    System.out.print("Please enter a number between 1 and 5.");
                }
     
            }
        }
     
        public void presentQuestion(int questionNumber, int respondentID){
            int response = 0;
            respondentID = getCurrentID();
            for (int count = 0; count < questions.length; count++) {
                // System.out.println("Question number: " + (count + 1));
                System.out.println("Respondent number " + respondentID + " please answer "
                        + "guestion number " + (count + 1));
                System.out.println(questions[count]);
                if (response >= 1 && response <= 5){
                    response = in.nextInt();
                }
                responses[count] = response;
            }   
        }
    }

    This is the main class
     
    import java.util.*;
    public class SurveyTest {
     
     
        static Scanner in = new Scanner(System.in);
     
     
     
        public static void main(String[] args) {
     
            Survey survey = new Survey();
            survey.enterQuestions();
            survey.logResponse();
     
     
        }
    }


  2. #2
    Crazy Cat Lady KevinWorkman's Avatar
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    Default Re: Loops and arrays

    Time to step through this with a debugger, or at least add some print statements, to figure out what's going on. Where exactly does the code's execution differ from what you expect it to do?
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