Read from a text file, then calculate min/max/mode/mean/median...?

**erichfx** · 01-31-2013, 07:59 PM

Hello, I am required to write a program that reads from a program a list of grades, then outputs the min/max/mode/median/mean of these grades. What am I genuinely confused with is where to start....? I understand the logic behind the mathematics calculations, however, I don't understand how to structure my program. I've created an array with a max amount of grades in the file being 500. Do I create new methods for each calculation (ie: public static int min ( ))? I'm confused, any guidance would be appreciated. Here is my code thus far.

Java Code:

import java.util.Scanner;
import java.io.*;
public class statistics
{
    public static void main (String [] args)
    {
        System.out.println("What file contains the data?");
        Scanner kbd = new Scanner(System.in);
        System.out.println("The maximum grade is: ");
        System.out.println("The minimum grade is: ");
        System.out.println("The mean grade is: ");
        System.out.println("The median grade is: ");
        System.out.println("The modal grade is: ");
    int [] grades = new int [500];
    int count = 0;
    try
    {
        input = new Scanner (new File(file));
    }
    catch(FileNotFoundException e)
    {
        System.err.println("Error blah blah blah");
        System.exit(0);
    }
    while(input.hasNext())
    {
        grades[count] = input.NextInt();
        System.out.println(grades[count]);
        count++;
    }
    input.close();
    Arrays.sort(grades, 0, count);
    }
}