-3
調査ファイルの末尾にあるreportSummary()メソッドのヘルプが必要です。私は、オンラインで見つけた指示を使って最初から調査プログラムを作成しています。私はこの時点までのすべての道ですが、私は何が欠けているか分かりません。java - レポートを表示して結果を処理する
現在のエラー（下記の回答からの助けを使用した後）：
C:\Users\Nael\Documents\NetBeansProjects\Survey\src\survey\Survey.java:156: error: illegal start of type
if (questions[i] instanceof (DoubleQuestions))
C:\Users\Nael\Documents\NetBeansProjects\Survey\src\survey\Survey.java:156: error: not a statement
if (questions[i] instanceof (DoubleQuestions))
C:\Users\Nael\Documents\NetBeansProjects\Survey\src\survey\Survey.java:156: error: ';' expected
if (questions[i] instanceof (DoubleQuestions))
C:\Users\Nael\Documents\NetBeansProjects\Survey\src\survey\Survey.java:186: error: class, interface, or enum expected
}
4 errors
C:\Users\Nael\Documents\NetBeansProjects\Survey\nbproject\build-impl.xml:930: The following error occurred while executing this line:
C:\Users\Nael\Documents\NetBeansProjects\Survey\nbproject\build-impl.xml:270: Compile failed; see the compiler error output for details.
Survey.java：
package survey;
import java.util.Scanner;
import java.io.Serializable;
public class Survey implements Serializable
{
private String surveyName;
private Question[] questions;
private int numQuestions;
private int maxResponses;
private boolean initialized;
public Survey(String n)
{
surveyName = n;
initialized = false;
}
//initialize() sets up the numQuestions, MaxResponses, and questions for the survey
public char Questions()
{
Scanner input = new Scanner(System.in);
System.out.println("Initializing survey \"" + surveyName + "\"\n");
//add a method for password validation!?!?!? yes!!! see the bank accounts lab
System.out.print("Enter max number of responses: ");
maxResponses = input.nextInt();
System.out.print("Enter number of questions: ");
numQuestions = input.nextInt();
input.nextLine(); //have to do this to "eat" the new line character or the next input won't work correctly
System.out.println();
questions = new Question[numQuestions];
char choice='c';
for(int i = 0; i < numQuestions;i++)
{
//output menu options
System.out.println();
System.out.println(" S - Create a String Question");
System.out.println(" N - Create a Integer Question");
System.out.println(" D - Create a Double Question");
//loop until a valid input is entered
System.out.print("Enter choice: ");
choice = input.next().charAt(0);
input.nextLine(); //still have to "eat" the current response
//if choice is one of the options, return it. Otherwise keep looping
if(choice == 'N' )
{
System.out.print("Enter text for question " + (i+1) + ": ");
//you will also need to ask what KIND of question - right now, defaults to integer question
questions[i] = new IntegerQuestion(input.nextLine(),maxResponses);
initialized = true;
}
else if(choice == 'S')
{
System.out.print("Enter text for question " + (i+1) + ": ");
//you will also need to ask what KIND of question - right now, defaults to integer question
questions[i] = new TextQuestion(input.nextLine(),maxResponses);
initialized = true;
}
else if(choice == 'D')
{
System.out.print("Enter text for question " + (i+1) + ": ");
//you will also need to ask what KIND of question - right now, defaults to integer question
questions[i] = new DoubleQuestions(input.nextDouble(),maxResponses);
initialized = true;
}
else
{
System.out.println("Invalid choice. Ensure a capital letter. Please re-enter.");
choice = '?';
}
}
return choice;
}
/*
run() gives the survey to a new survey taker, basically asks all the questions in the survey
*/
public void startSurvey()
{
if(initialized)
{
System.out.println("Welcome to the survey \"" + surveyName + "\"\n");
for(int i = 0;i < numQuestions; i ++)
{
questions[i].askQuestion();
}
System.out.println("Thank you for participating!");
}
else
{
System.out.println("Survey has not yet been setup. Please initialize first.");
}
}
/*
displayResults() displays the raw data for the survey
*/
public void Results()
{
System.out.println("Displaying data results for \"" + surveyName + "\"\n");
for(int i = 0;i < numQuestions; i ++)
{
questions[i].displayResults();
System.out.println();
}
}
/*
displayReportSummary() should run tests on your data
Examples could be: the most common response (median), the average response (mean), or display a graph of the results?
The choices are endless!
*/
public void reportSummary()
{
for(int i=0;< numQuestions; i ++)
{
if (questions[i] instanceof (DoubleQuestions)
{
DoubleQuestions temp = (DoubleQuestions) questions[i];
temp.doubleAverage();
System.out.println();
}
}
}
}
DoubleQuestion：
package survey;
import java.util.Scanner;
public class DoubleQuestions extends Question
{
private double[] responses;
public DoubleQuestions(double q, int m)
{
super(Double.toString(q),(m));
responses = new double[m];
}
@Override
public void askQuestion()
{
double response;
Scanner input = new Scanner(System.in);
System.out.print(question + " ");
input.nextLine(); //still have to "eat" the current response
response = input.nextDouble();
responses[numResponses] = response;
numResponses++;
}
@Override
public void displayResults()
{
System.out.println(question);
for(int i = 0; i < numResponses;i++)
System.out.println(responses[i]);
}
}
あなたの質問は正確ですか？また、不要なコードを削除して[MCVE]を作成してください – anacron
私の質問は 'reportSummary（）'にあります。私のコードは機能しません。 –
機能がないとはどういう意味ですか？ – Blasanka