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CSE142 Program Example handout #18
Input file hours.txt
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8 8 8 8 8
8 4 8 4 8 4 4
8 4 8 4 8
3 0 0 8 6 4 4
8 8
0 0 8 8
8 8 4 8 4
Program Output
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Total hours = 40
Total hours = 40
Total hours = 32
Total hours = 25
Total hours = 16
Total hours = 16
Total hours = 32
Mon hours = 43
Tue hours = 32
Wed hours = 36
Thu hours = 40
Fri hours = 34
Sat hours = 8
Sun hours = 8
Total hours = 201
Program file Hours.java
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// Stuart Reges
// 2/16/05
// This program reads an input file with information about hours worked and
// produces a list of total hours worked each week and total hours worked for
// each day of the week. Each line of the input file should contain
// information for one week and should have up to 7 integers representing how
// many hours were worked each day (Monday first, then Tuesday, through
// Sunday).
import java.io.*;
public class Hours {
public static final int DAYS = 7; // # of days in a week
public static void main(String[] args) throws FileNotFoundException {
Scanner input = new Scanner(new File("hours.txt"));
processFile(input);
}
// processes an input file of data about hours worked by an employee
public static void processFile(Scanner input) {
int[] total = new int[DAYS];
while (input.hasNextLine()) {
String text = input.nextLine();
Scanner data = new Scanner(text);
int[] next = transferFrom(data);
System.out.println("Total hours = " + sum(next));
addTo(total, next);
}
System.out.println();
print(total);
}
// constructs an array of DAYS integers initialized to 0 and transfers
// data from the given Scanner into the array in order; assumes the
// Scanner has no more than DAYS integers
public static int[] transferFrom(Scanner data) {
int[] result = new int[DAYS];
int i = 0;
while (data.hasNextInt()) {
result[i] = data.nextInt();
i++;
}
return result;
}
// returns the sum of the integers in the given array
public static int sum(int[] numbers) {
int sum = 0;
for (int i = 0; i < numbers.length; i++)
sum += numbers[i];
return sum;
}
// adds the values in next to their corresponding entries in total
public static void addTo(int[] total, int[] next) {
for (int i = 0; i < DAYS; i++)
total[i] += next[i];
}
// prints information about the totals including total hours for each
// day of the week and total hours overall
public static void print(int[] total) {
String[] dayNames = {"Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"};
for (int i = 0; i < DAYS; i++)
System.out.println(dayNames[i] + " hours = " + total[i]);
System.out.println("Total hours = " + sum(total));
}
}
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