See below.
Here is the complete program:
import java.io.*; import java.util.Scanner; class AddUpAll { public static void main ( String[] args ) throws IOException { int value; // the value of the current integer int limit; // the number of integers to add up int sum = 0; // initialize sum // Prompt for and open the input file Scanner user = new Scanner( System.in ); System.out.print("File name? "); String fileName = user.next().trim(); Scanner scan = new Scanner( new File(fileName) ); // get the number of integers to add up System.out.println("Enter how many integers:"); limit = scan.nextInt(); int count = 1; // initialize count while ( count <= limit ) { System.out.print("Enter a number: "); value = scan.nextInt(); sum = sum + value; // add to the sum count = count + 1; // increment count } System.out.println( "Grand Total: " + sum ); } }
Does the input file need to have one integer per line?