[janeansley]

Code:

import java.util.Scanner;
import java.io.*;

public class TestCalculate
{
   public static void main( String args[] )
   throws java.io.IOException
   {

	   final double PCOUNT = infinity;
	   double a[]= new double[PCOUNT];
	   double i, y=0;

	   String filename, inLine;


	   //keyboard input stream
	   InputStreamReader isr = new InputStreamReader(System.in);
	   BufferedReader br = new BufferedReader(isr);

	   //get the input data
	   System.out.print( "Enter the txt file name: " );
	   filename = br.readLine();

	   //file input stream
	   BufferedReader fi = new BufferedReader(new FileReader(filename));

	   //read existing data and calculate
	   for(i=0; i++)
	   {
		   inLine = fi.readLine();
		   a[i] = Double.parseDouble(inLine);
		   y = ((4.2*a[i]/1010)-1.35);
	   }
	   fi.close();

	   //store the calculated value in another txt file
	   PrintWrite pw = new PrinWriter(new BufferedWriter(new FileWriter(filename)));

	   for(i=0; i++)
	   pw.println(y[i]);

	   System.out.print( "A calculated Output.txt file is created" );
	   pw.close();


   }

}

I have tried to create something here, I am not sure is correct as I am new still learning, but my program having errors. I have problem with the calculation and create the "Output.txt". Please correct me. Thanks.