Answered: Which Java program reads all integer…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Which Java program reads all integer numbers from a text file, and prints their average with 2 decimal places?

Assume the following statement is given:

Scanner fscan = new Scanner(new File("ints.txt"));

a. None of the others

b. int count = 0, sum = 0; while (fscan.hasNextInt()) { int n = fscan.nextInt(); count++; sum += n; } fscan.close(); System.out.printf("%f\n", sum / count);

c. int count = 0, sum = 0; while (fscan.hasNextInt()) { int n = fscan.nextInt(); count++; sum += n; } fscan.close(); System.out.printf("%.2f\n", (double)sum / count);

d. int count = 0, sum = 0; while (fscan.hasNextLine()) { int n = fscan.nextInt(); count++; sum += n; } fscan.close(); System.out.println((double)sum / count);

e. int count = 0, sum = 0; while (fscan.hasNext()) { int n = fscan.next(); count++; sum += n; } fscan.close(); System.out.printf("%.2f\n", (double)sum / count);

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