Question

Exercises

4. Using the IDE make a new project/program by changing SmallIO.java so that integers instead of Strings are entered by the user.

5. Change the program so that it only loops until the number -999 is entered by the user.

6. Modify the last program so that it (a) keeps and displays a running total and the average so far of the entered numbers (b) displays the largest and the smallest numbers so far of the entered numbers.

NOTE: PART 4 AND 5 HAS BEEN DONE. IN PART 6a TOTAL HAS BEEN DONE YOU HAVE TO CALCULATE AVERAGE AND DO PART B. BELOW IS THE PROGRAM CONTINUE DOING IT FROM WHERE I LEFT. THANKS

package tutorial1;

import java.util.Scanner;

/**
*
* @author ML
*/
public class Tutorial1 {

  
public static void main(String[] args) {
  
Scanner keyboard = new Scanner(System.in);
int a = 0; // initialise to empty string
int total = 0;
  
while (a != -999){
//an infinite loop, use Ctrl-C to quit
System.out.println("Enter a line:"); //prompt
a= keyboard.nextInt(); ///accepts an integer
System.out.println("Your number: " + a);
  
//method caLLS
total = totalaverage(a, total);
System.out.println("Your total is: " + total);
  
System.out.println(); // print a blank line
} //end of while
  
  
}//end of main
// keeps and displays a running total and the average so far of the entered numbers
public static int totalaverage(int a, int total)
{

return total + a ;

  
}
  
  
  
  
  
  
  
}

Answer 1

If you have any problem with the code feel free to comment.i have highlighted the edited codes.

Program

import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;

/**
*
* @author ML
*/
public class Test {

   public static void main(String[] args) {

       Scanner keyboard = new Scanner(System.in);
       int a = 0; // initialise to empty string
       int total = 0;

       // arraylist for holding as much valuye as possible
       ArrayList<Integer> list = new ArrayList<>();

       while (true) {
           // an infinite loop, use Ctrl-C to quit
           System.out.println("Enter a line:"); // prompt
           a = keyboard.nextInt(); /// accepts an integer

           if (a == -999)// quite condition
               break;

           System.out.println("Your number: " + a);

        list.add(a);

           // method caLLS
           total = totalaverage(a, total);
           System.out.println("Your total is: " + total);
           // showing the average in 2 decimal places
           System.out.printf("Average is: %.2f\n", (double) total / (double) list.size());
           // displaying max and min value
           System.out.println("Max value entered: " + Collections.max(list));
           System.out.println("Min value entered: " + Collections.min(list));

           System.out.println(); // print a blank line
       } // end of while

   }// end of main
// keeps and displays a running total and the average so far of the entered numbers

   public static int totalaverage(int a, int total) {

       return total + a;

   }

}

Output