Help with Java problem

[marioe47]

Alright this one problem is giving me the hardest time of not really knowing where to start first. It looks so simple but then again I'm new to java. Any help would be appreciated.

Write a complete Java program to take input from a file ("input.txt" using Scanner) that is in the following format:

88 71 93
82 92 81
56 14 62
94 95 96

To an output file ("output.txt" using Formatter) and to the screen (System.out), output in the following format (use '\t' for a tab and AV means average, calculated by your program):

P1 P2 P3 AV
S1 88 71 93 84
S2 82 92 81 85
S3 56 14 62 44
S4 94 95 96 95
AV 80 68 83

[Junky]

not really knowing where to start

Yes you do. You know how to write a class. You know how to write a method. Well thats a start. Next step is to read a single line from the file and display it to the screen. Once you have that working, read ALL lines from the file and print to screen. Then keep going taking it one step at a time.

[marioe47]

import java.io.File;
import java.util.Scanner;


public class project{
public static void main(String[] args) throws Exception {


Scanner sc = new Scanner( new File( "input.txt"));

int grades;

System.out.printf("\t%-10s%-12s%-12s%10s\n", "P1", "P2","P3","AV");

while ( input.hasNext()){
grades = input.nextInt();


}
}

}

This is what I have got now. But since the grades are broken down to each student and then each test I'm not sure how to get the student part to show and along with that I'm not entirely sure how to do the average from the data given by a file.

[Junky]

Your data looks perfect for a 2D array. What I would do is read each line, then split it, then convert each String "00" into an int 00 and insert into the 2D array. You cannot calculate the averages until you have read and stored all the data. So why worry about it yet? This is what I meant by doing things one step at a time.

[UJJAL DHAR]

here is an algorithm.just convert it in approprieate code

for i=0 to i<4
  for j=0 to j<3
    read a[i][j]     //a[][] is int
//input section ends here

print (P1 P2 P3 AV)

for i=0 to i<3{
   print(s,i+1)
  for j=0 to j<3
    print(a[i][j])
print(value of last colum like 84)
}
print(av)
for j=0 to j<3
   print (a[3][j])
print(value of last colum like 84)