import java.io.*;

class readText
{
public static void main(String[] args) {
	int sum = 0;
	int currentLine; // stores the integer of the current line
	try{
	         FileReader in = new FileReader(args[0]);
	         BufferedReader data = new BufferedReader(in);
	         // read the first line of input file
	         String s = data.readLine();
         	         while (s!=null) {
		  // get the int value of the current line
		  currentLine = (new Integer(s)).intValue();
		  System.out.println("current line: " + currentLine);
	  	  // add the current integer to sum
		  sum += currentLine;
		  // read the next line
		  s = data.readLine();
	         }
	         in.close();
	        data.close();
	}
	catch (NumberFormatException e){
	       // input file must have exactly one integer each line
	       System.out.println("Data format error in input file");
	}
	catch (IOException e){
	       System.out.println("Unable to read input file");
	}
	System.out.println("sum = " + sum);
}
}