CONTROL STRUCTURES II: REPETITION - Java Programming: From Problem Analysis to Program Design - page 268

EXAMPLE 5-7

The following code uses an EOF-controlled while loop to find the sum of a set of
numbers:

static Scanner console = new Scanner(System.in);

int sum = 0;
int num;

while (console.hasNext())
{

num = console.nextInt(); //Get the next number
sum = sum + num; //Add the number to sum

}

System.out.printf("Sum = %d%n", sum);

EXAMPLE 5-8

Suppose we are given a file consisting of students' names and their test scores, a number
between 0 and 100 (inclusive). Each line in the file consists of a student name followed by
the test score. We want a program that outputs each student's name followed by the test
score and the grade. The program also needs to output the average test score for the class.
Consider the following program.
// This program reads data from a file consisting of students'
// names and their test scores. The program outputs each
// student's name followed by the test score and the grade. The
// program also outputs the average test score for all students.

import java.io.*; //Line 1

import java.util.*; //Line 2

public class ClassAverage //Line 3

{ //Line 4

public static void main(String[] args)
throws FileNotFoundException //Line 5

{ //Line 6

String firstName; //Line 7

String lastName; //Line 8

double testScore; //Line 9

char grade = ''; //Line 10

double classAverage; //Line 11

double sum = 0; //Line 12

int count = 0; //Line 13