/**
 * Lab 5, loops - Manipulate a user inputted int using various loops
 *
 * @author (Alec Campbell)
 * @version (10-18-2018)
 */

import java.util.Scanner; //Import Scanner for console input
public class Loops
{
  public static void main (String [] args)
  {
    // Program output header
    System.out.println("Programmer: Alec Campbell");
    System.out.println("Course:     COSC111, Fall 2018");
    System.out.println("Lab#:       5");
    System.out.println("Due date:   Oct. 18 2018\n");

    // Create new scanner object "keyIn"
    Scanner keyIn = new Scanner (System.in);

    // Repeat the process as many times as the user wishes
    String choice;
    do
    {
      // Ask user to input a whole number then assign it to a variable
      System.out.print("Enter a whole number: ");
      int userInt = keyIn.nextInt();

      // Check if userInt is even or odd and print result
      if (userInt % 2 == 0)
        System.out.printf("%d is even", userInt);
      else
        System.out.printf("%d is odd", userInt);

      // Output all numbers from 1 through userInt
      System.out.print("\n\n");
      System.out.printf("Numbers from 1 to %d are:\n", userInt);
      for (int i = 1; i <= userInt; i++)
        System.out.print(i + "\t");

      // Output the square of all odd numbers from 1 through userInt
      System.out.print("\n\n");
      System.out.printf("Square of odd numbers from 1 to %d are:\n", userInt);
      int counter = 1;
      while (counter <= userInt)
      {
        if (counter % 2 == 1)
          System.out.print((counter * counter) + "\t");
        counter++;
      }

      // Output the sum of all even numbers from 1 to userInt
      System.out.print("\n\n");
      System.out.printf("Sum of even numbers from 1 to %d is:\n", userInt);
      int sum_of_evens = 0;
      counter = 1;
      while (counter <= userInt)
      {
        if (counter % 2 == 0)
          sum_of_evens += counter;
        counter++;
      }
      System.out.print(sum_of_evens);

      // Outputs all numbers from 1 to userInt, only 5 numbers per line
      System.out.print("\n\n");
      System.out.printf("Numbers from 1 through %d (5 numbers per line):\n", userInt);
      for (int i = 1; i <= userInt; i++)
      {
        System.out.print(i + "\t");
        if (i % 5 == 0)
          System.out.print("\n");
      }
      // Modified program that allows the user to repeat the above steps
      // as many times as (s)he wishes.
      // Ask user if they wish to repeat the program
      System.out.print("\n\n");
      System.out.print("Do it again, yes (or no)?");
      choice = keyIn.next();
      System.out.print("\n");
    } while (choice.equalsIgnoreCase("yes"));
  }
}

/*
 * Programmer: Alec Campbell
 * Course:     COSC111, Fall 2018
 * Lab#:       5
 * Due date:   Oct. 18 2018
 *
 * Enter a whole number: 12
 * 12 is even
 *
 * Numbers from 1 to 12 are:
 * 1	2	3	4	5	6	7	8	9	10	11	12
 *
 * Square of odd numbers from 1 to 12 are:
 * 1	9	25	49	81	121
 *
 * Sum of even numbers from 1 to 12 is:
 * 42
 *
 * Numbers from 1 through 12 (5 numbers per line):
 * 1	2	3	4	5
 * 6	7	8	9	10
 * 11	12
 *
 * Do it again, yes (or no)?yes
 *
 * Enter a whole number: 9
 * 9 is odd
 *
 * Numbers from 1 to 9 are:
 * 1	2	3	4	5	6	7	8	9
 *
 * Square of odd numbers from 1 to 9 are:
 * 1	9	25	49	81
 *
 * Sum of even numbers from 1 to 9 is:
 * 20
 *
 * Numbers from 1 through 9 (5 numbers per line):
 * 1	2	3	4	5
 * 6	7	8	9
 *
 * Do it again, yes (or no)?no
 */