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Answer:

See below.

Complete Program

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 );
  }
}

QUESTION 5:

Does the input file need to have one integer per line?