12.
input: 6.7        This file has
input:         several input lines.
input:
input:   10 20         30   40
input:
input: test
6 total
14a.
0 total
14b.
input: 6.7
1 total
16.
import java.io.*;
import java.util.*;
public class printEntireFile
{
    public static void main(String [] args)
    throws FileNotFoundException
    {
        Scanner pikachu = new Scanner(System.in);
        System.out.print("Input your file name");
        String file = pikachu.next();
        Scanner input = new Scanner(new File("file");
        while(input.hasNextLine())
        {
            System.out.println(input.nextLine());
        }
    }
}