Question

This assignment should be relatively easy. Write a program in any reasonably high-level language, that reads in numbers from a file, one per line, until it detects that a 0 (zero not an oh') has been entered The 0 does not count as part of the number series. After all numbers have been entered print out the number of items entered, the sum, the minimum value entered, the maximum value entered, and the arithmetic mean (one on each line), in the order listed here.

Answer 1

$\color{red}\underline{In\;Java:}$

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class NumbersFile {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter file name: ");  // ask for file name
        File file = new File(in.nextLine());    // read file name
        try {
            Scanner fin = new Scanner(file);    // open file
            int count = 0;  // create variables
            double min = 0, max = 0, total = 0, num;
            while (fin.hasNextInt()) {  // as long as there are number in file
                num = fin.nextInt();    // read numbers from file
                if (num == 0)   // if number read was 0, then stop processing
                    break;
                if (count == 0) {
                    min = num;
                    max = num;
                }
                // update min, max, total and count
                if (num > max) max = num;
                if (num < min) min = num;
                total += num;
                ++count;
            }
            // calculate arithmetic mean
            double mean = total / count;

            // display results
            System.out.println("Number of items read is " + count);
            System.out.println("The sum of numbers is " + total);
            System.out.println("The smallest of numbers is " + min);
            System.out.println("The largest of numbers is " + max);
            System.out.println("The arithmetic mean of numbers is " + mean);
            fin.close();
        } catch (FileNotFoundException e) {
            System.out.println(file.getAbsolutePath() + " is not found!");
        }
    }
}