CODEWITHSUNDEEP
javaarraysfor-loop
Cody Tapp
Cody Tapp

Reputation: 19

Having problems utilizing Arrays and for loops in a Java assignment

The program asks to "write a Java program that will first ask the user how many grades they want to enter. Then use a do..while loop to populate an array of that size with grades entered by the user. Then sort the array. In a for loop read through that array, display the grades and total the grades. After the loop, calculate the average of those grades and display that average."

The output is the issue. No matter what I do with the code, it will only output two of the inputs I have typed. If I chose to enter 4,5, or 10 grades. It will only show the lowest two. Although the total and the averages are correct. What is it that I am missing here?

Here is what I have written:

import java.util.Scanner;
import java.util.Arrays;

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

        int count;
        double inputGrade = 0;
        double gradeTotal = 0;
        double[] individualGrade; 

        System.out.println("Enter the number of students that are being graded.");
        int numberOfGrades = keyboard.nextInt();

        individualGrade = new double[numberOfGrades];
        count = 0;

        do
        {
            System.out.println("Enter the grade (from 0-100) for each student below.");
            inputGrade = keyboard.nextDouble();
            individualGrade[count] = inputGrade;            
            count++;
            gradeTotal+= inputGrade;

        } while(count < numberOfGrades);

            Arrays.sort(individualGrade);

            for(count = 0; count == individualGrade.length; count++);
            {
                // This next line is using gradeTotal as an array. However, there is no array by that name.
                // Check which array this should be.
                System.out.println("The grades entered are the following: \n" + inputGrade + "\n" + individualGrade[count]);
            }

            double gradeAverage = gradeTotal / numberOfGrades;
            System.out.println("The total of the grades is " + gradeTotal);
            System.out.println("The average of the grades entered is " + gradeAverage);

    }
}

Upvotes: 0

Views: 84

Answers (1)

Scary Wombat
Scary Wombat

Reputation: 44834

Two main problems

for(count = 0; count == individualGrade.length; count++);

this should not have a seimcolon and looping until this values is reached is correct.

for(count = 0; count < individualGrade.length; count++) 
{
    System.out.println("The grades entered are the following: \n" +
                         inputGrade + "\n" + individualGrade[count]);
}

Upvotes: 4

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