Lab01zad04

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;

public class Problem4 {
    public static void main(String[] args) throws IOException {
        BufferedReader br = null;
        PrintWriter writer = null;
        try {
            FileReader filer = new FileReader("rezultati.csv.txt");
            br = new BufferedReader(filer);
            writer = new PrintWriter("rezultati.tsv.txt");
            String line = br.readLine(), indeks = null;
            String[] predmeti = line.split(",");
            int brPredmeti = predmeti.length - 1, brStudenti = 0;
            int ocenkiV = 0, ocenkiA = 0, ocenkiK = 0, suma = 0;
            while(br.lines() != null) {
                line = br.readLine();
                if(line == null) break;
                else {
                String[] podatoci = line.split(",");
                indeks = podatoci[0];
                brStudenti++;
                ocenkiV += Integer.parseInt(podatoci[1]);
                ocenkiA += Integer.parseInt(podatoci[2]);
                ocenkiK += Integer.parseInt(podatoci[3]);
                suma = 0;
                for(int i = 1; i < podatoci.length; i++) {
                    suma += Integer.parseInt(podatoci[i]);
                }
                writer.println(indeks + "\t" + suma*1.0/brPredmeti);
                }
            }
            writer.println("Verojatnost i statistika: \t" + ocenkiV*1.0/brStudenti);
            writer.println("Algoritmi i podatocni strukturi: \t" + ocenkiA*1.0/brStudenti);
            writer.println("Kompjuterski mrezi: \t" + ocenkiK*1.0/brStudenti);
        }
        catch(FileNotFoundException f) {
            System.out.println("File not found!");
            return;
        }
        finally {
            br.close();
            writer.close();
        }
    }
}