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CSE142 Program Example handout #22
Input file section.txt
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1 1 1 1 1 1 1 1 1 1
1 1 1 0 1 0 1 1 0 1
1 0 1 1 1 1 0 1 1 1
0 1 1 0 1 1 0 1 1 1
1 1 0 1 1 0 1 0 0 0
1 1 1 0 0 1 0 0 0 1
1 0 1 0 0 1 0 0 1 1
1 0 1 0 1 0 0 1 0 1
Output file section.out
-----------------------
3 3 3 3 3 3 2 0 0 0
3 3 3 0 3 0 3 3 0 2
3 0 3 3 3 3 0 3 2 0
0 3 3 0 3 3 0 3 3 2
3 3 0 3 3 0 3 0 0 0
3 3 3 0 0 3 0 0 0 3
3 0 3 0 0 3 0 0 3 3
3 0 3 0 3 0 0 3 0 3
Program file Section.java
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// Stuart Reges
// 2/24/05
//
// This program converts an input file of section attendance scores from a
// boolean (0/1) form to a numerical form. A 0 means someone did not attend,
// a 1 means they did attend. Students get 3 points for each section they
// attend with a maximum of 20 points. The input file consists of input lines
// each of which have one student's attendance record in the 0/1 form. The
// output file lists the corresponding points for attendance. The output is
// also echoed to System.out.
import java.io.*;
import java.util.*;
public class Section {
public static final int SECTIONS = 10; // # of section scores per line
public static void main(String[] args) throws FileNotFoundException {
Scanner input = new Scanner(new File("section.txt"));
PrintStream output = new PrintStream(new File("section.out"));
processFile(input, output);
}
// processes the given input file, sending a report to the given output
public static void processFile(Scanner input, PrintStream output) {
while (input.hasNextLine()) {
String text = input.nextLine();
Scanner data = new Scanner(text);
int[] scores = new int[SECTIONS];
fillIn(scores, data);
report(output, scores);
report(System.out, scores);
}
}
// fills in the scores for a series of boolean (0/1) section scores
// stored in the given scanner, making sure that no student goes over
// 20 points
public static void fillIn(int[] scores, Scanner data) {
int sum = 0;
for (int i = 0; i < SECTIONS; i++) {
int next = data.nextInt();
if (next == 1 && sum < 18) {
scores[i] = 3;
} else if (next == 1 && sum == 18) {
scores[i] = 2;
} else {
scores[i] = 0;
}
sum += scores[i];
}
}
// reports a set of scores on a single line of output to the given
// print stream
public static void report(PrintStream output, int[] scores) {
for (int i = 0; i < SECTIONS; i++) {
output.print(scores[i] + " ");
}
output.println();
}
}
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