Issue with trying to fix my printf statement

Question

I need to fix my addQuiz() in my student class. Then, with that class, I pull all the info into my main of prog2. I have everything working except two things. I need to get the formula fixed for my addQuiz() so it totals the amount of points entered, and fix the while statement in my main so that I can enter a word to tell the program that I am done entering my quizzes.

Here is my main file.

import java.util.Scanner;

public class Prog2 {

 public static void main(String[] args) {
  Scanner in = new Scanner(System.in);
  Student student = new Student();
  //creates array for quizzes
  double[] grades = new double[99];
  //counter for total number of quizzes
  int num = 0;

  //requests user to enter students name
  System.out.print("Enter name of student: ");
  String name = in .nextLine();

  //requests user to enter students quizzes
  System.out.print("Enter students quiz grades: ");
  int quiz = in .nextInt();

  while (quiz >= 1) {

   System.out.print("Enter students quiz grades: ");
   quiz = in .nextInt();
   grades[num] = quiz;
   num++;
  }
  //prints the name, total, and average of students grades
  System.out.println();
  System.out.println(name);
  System.out.printf("\nTotal: ", student.addQuiz(grades, num));
  System.out.printf("\nAverage: %1.2f", student.Average(grades, num));
 }
}

here is my student file:

    public class Student {
private String name;
private int total;
private int quiz;
static int num;

public Student() {
    super();    
}

public String getName(){
    return name;
}
public void setName(String name){
    this.name = name;
}
public int getTotal() {
    return total;
}
public void setTotal(int total) {
    this.total = total;
}
public int getQuiz() {
    return quiz;
}

public void setQuiz(int quiz) {
    this.quiz = quiz;
}

public static double addQuiz( double[] grades, int num){
    int totalQuiz = 0;
    for( int x = 0; x < num; x++){
        totalQuiz += grades[x];
    }
            return totalQuiz;
    }
public static double Average( double[] grades, int num){
    double sum = 0;
    for( int x = 0; x < num; x++){
        sum += grades [x];
    }
    return (double) sum / num;
}
}

Any help would be much appreciated!

see your friends question @ http://stackoverflow.com/questions/35352769/how-to-fix-my-counter-and-average-calculator/35352840#35352840 — Scary Wombat, Feb 12 '16 at 02:51
I did see that, yet it doesnt answer what issues i have as we are working on the same assignment. Since i do not have the ability to respond to peoples posts yet i am not capable of asking my own questions on that forum post. That is why i created my own. — T.Brown68, Feb 12 '16 at 02:57

score 0 · Answer 1 · answered Feb 12 '16 at 04:18

Your requirement is not clear but as I guess it should be something like this.

Prog2 class:

    public static void main(String[] args) {

    // requests user to enter students name
    System.out.print("Enter name of student: ");
    Scanner in = new Scanner(System.in);
    String name = in.nextLine();

    Student student = new Student(name);

    System.out.print("Enter number of quiz: ");
    int count = in.nextInt();

    for (int i = 0; i < count; i++) {
        // requests user to enter students quizzes
        System.out.print("Enter students quiz grades: ");
        int quiz = in.nextInt();
        student.addGrade(quiz);
    }

    // prints the name, total, and average of students grades
    System.out.println(name);
    System.out.println("Total: " + student.getTotal());
    System.out.println("Average: " + student.getAverage());
}

Student class:

    private String name;
private List<Double> grades = new ArrayList<Double>();

public Student(String name) {
    super();
    this.name= name;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public void addGrade(double grade) {
    this.grades.add(grade);
}

public double getTotal() {
    double total = 0;
    for (double grade : grades) {
        total += grade;
    }
    return total;
}

public double getAverage() {
    return (double) getTotal() / grades.size();
}

Accept the answer if it helps.

score 0 · Answer 2 · answered Feb 12 '16 at 04:18

Well for the stop condition you could try something like this

String stopFrase="stop";
String userInput="";
int quiz;
//Other code
for(;;) //This basically means loop until I stop you
{
  System.out.print("Enter students quiz grades type 'stop' to finish:");
  userInput=in.nextLine();
  if(userInput.equals(stopFrace))
  {
    break;//Stop the loop
  }
  quiz= Integer.parseInt(userInput);
  //The rest of your code
}

Your addQuiz() method seems fine, if you are not getting the desired result please check your parameters, specifically make sure that number matches the number of quiz entered.

Issue with trying to fix my printf statement

2 Answers2

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